/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 21:59:00,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 21:59:00,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 21:59:00,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-10 21:59:00,932 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-10 21:59:00,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-10 21:59:00,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-10 21:59:00,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-10 21:59:00,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-10 21:59:00,937 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-10 21:59:00,938 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-10 21:59:00,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-10 21:59:00,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 21:59:00,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 21:59:00,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 21:59:00,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 21:59:00,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 21:59:00,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 21:59:00,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 21:59:00,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 21:59:00,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 21:59:00,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 21:59:00,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 21:59:00,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 21:59:00,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-10 21:59:00,950 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-10 21:59:00,950 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-10 21:59:00,950 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-10 21:59:00,951 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-10 21:59:00,951 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-10 21:59:00,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-10 21:59:00,952 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-10 21:59:00,952 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-10 21:59:00,953 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-10 21:59:00,954 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-10 21:59:00,954 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-10 21:59:00,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-10 21:59:00,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-10 21:59:00,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 21:59:00,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 21:59:00,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 21:59:00,960 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-10 21:59:00,984 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 21:59:00,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 21:59:00,985 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 21:59:00,985 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 21:59:00,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 21:59:00,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 21:59:00,986 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 21:59:00,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 21:59:00,986 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 21:59:00,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 21:59:00,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 21:59:00,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 21:59:00,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 21:59:00,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 21:59:00,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 21:59:00,987 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 21:59:00,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 21:59:00,987 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 21:59:00,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 21:59:00,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 21:59:00,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 21:59:00,988 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 21:59:00,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 21:59:00,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:59:00,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 21:59:00,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 21:59:00,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 21:59:00,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 21:59:00,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 21:59:00,989 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 21:59:00,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 21:59:00,989 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 21:59:01,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 21:59:01,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 21:59:01,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 21:59:01,261 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 21:59:01,275 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 21:59:01,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-trans.wvr.bpl [2021-03-10 21:59:01,276 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-trans.wvr.bpl' [2021-03-10 21:59:01,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 21:59:01,332 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 21:59:01,333 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 21:59:01,333 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 21:59:01,333 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 21:59:01,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:59:01" (1/1) ... [2021-03-10 21:59:01,350 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:59:01" (1/1) ... [2021-03-10 21:59:01,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 21:59:01,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 21:59:01,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 21:59:01,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 21:59:01,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:59:01" (1/1) ... [2021-03-10 21:59:01,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:59:01" (1/1) ... [2021-03-10 21:59:01,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:59:01" (1/1) ... [2021-03-10 21:59:01,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:59:01" (1/1) ... [2021-03-10 21:59:01,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:59:01" (1/1) ... [2021-03-10 21:59:01,375 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:59:01" (1/1) ... [2021-03-10 21:59:01,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:59:01" (1/1) ... [2021-03-10 21:59:01,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 21:59:01,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 21:59:01,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 21:59:01,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 21:59:01,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:59:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:59:01,451 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 21:59:01,451 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 21:59:01,452 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 21:59:01,452 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 21:59:01,452 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 21:59:01,452 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 21:59:01,452 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 21:59:01,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 21:59:01,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 21:59:01,453 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 21:59:01,453 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 21:59:01,453 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 21:59:01,454 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 21:59:01,824 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 21:59:01,824 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-03-10 21:59:01,825 INFO L202 PluginConnector]: Adding new model name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:59:01 BoogieIcfgContainer [2021-03-10 21:59:01,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 21:59:01,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 21:59:01,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 21:59:01,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 21:59:01,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:59:01" (1/2) ... [2021-03-10 21:59:01,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1093442 and model type name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 09:59:01, skipping insertion in model container [2021-03-10 21:59:01,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:59:01" (2/2) ... [2021-03-10 21:59:01,830 INFO L111 eAbstractionObserver]: Analyzing ICFG name-comparator-trans.wvr.bpl [2021-03-10 21:59:01,833 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 21:59:01,833 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 21:59:01,841 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 21:59:01,841 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 21:59:01,864 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-10 21:59:01,875 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-10 21:59:01,887 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 21:59:01,887 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 21:59:01,887 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 21:59:01,887 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 21:59:01,887 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 21:59:01,887 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 21:59:01,887 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 21:59:01,887 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 21:59:01,893 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-03-10 21:59:01,904 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:01,906 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:01,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:59:01,911 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:01,912 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:01,912 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:01,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:01,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1690757270, now seen corresponding path program 1 times [2021-03-10 21:59:01,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:01,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773889494] [2021-03-10 21:59:01,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:02,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773889494] [2021-03-10 21:59:02,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:59:02,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:59:02,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111270243] [2021-03-10 21:59:02,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:59:02,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:02,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:59:02,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:59:02,101 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 2.8703703703703702) internal successors, (310), 109 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:02,150 INFO L93 Difference]: Finished difference Result 192 states and 551 transitions. [2021-03-10 21:59:02,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:59:02,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:59:02,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:02,163 INFO L225 Difference]: With dead ends: 192 [2021-03-10 21:59:02,163 INFO L226 Difference]: Without dead ends: 129 [2021-03-10 21:59:02,164 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:59:02,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-03-10 21:59:02,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-03-10 21:59:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2021-03-10 21:59:02,213 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2021-03-10 21:59:02,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:02,214 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2021-03-10 21:59:02,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,214 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2021-03-10 21:59:02,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:59:02,216 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:02,216 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:02,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 21:59:02,217 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:02,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:02,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1970777821, now seen corresponding path program 1 times [2021-03-10 21:59:02,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:02,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026392321] [2021-03-10 21:59:02,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:02,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026392321] [2021-03-10 21:59:02,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12289644] [2021-03-10 21:59:02,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:02,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:59:02,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:02,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:59:02,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-03-10 21:59:02,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464048956] [2021-03-10 21:59:02,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:59:02,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:02,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:59:02,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:59:02,595 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:02,734 INFO L93 Difference]: Finished difference Result 202 states and 574 transitions. [2021-03-10 21:59:02,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:59:02,734 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:59:02,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:02,738 INFO L225 Difference]: With dead ends: 202 [2021-03-10 21:59:02,738 INFO L226 Difference]: Without dead ends: 202 [2021-03-10 21:59:02,739 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 145.0ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:59:02,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-03-10 21:59:02,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 160. [2021-03-10 21:59:02,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.8742138364779874) internal successors, (457), 159 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 457 transitions. [2021-03-10 21:59:02,763 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 457 transitions. Word has length 18 [2021-03-10 21:59:02,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:02,763 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 457 transitions. [2021-03-10 21:59:02,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:02,764 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 457 transitions. [2021-03-10 21:59:02,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:59:02,765 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:02,765 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:02,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-03-10 21:59:02,965 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:02,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:02,966 INFO L82 PathProgramCache]: Analyzing trace with hash -92460565, now seen corresponding path program 2 times [2021-03-10 21:59:02,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:02,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485731385] [2021-03-10 21:59:02,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:03,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485731385] [2021-03-10 21:59:03,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249797938] [2021-03-10 21:59:03,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:03,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-03-10 21:59:03,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:03,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:59:03,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:59:03,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 21:59:03,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-03-10 21:59:03,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743774723] [2021-03-10 21:59:03,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:59:03,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:03,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:59:03,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:59:03,150 INFO L87 Difference]: Start difference. First operand 160 states and 457 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:03,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:03,202 INFO L93 Difference]: Finished difference Result 252 states and 727 transitions. [2021-03-10 21:59:03,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:59:03,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:59:03,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:03,208 INFO L225 Difference]: With dead ends: 252 [2021-03-10 21:59:03,208 INFO L226 Difference]: Without dead ends: 165 [2021-03-10 21:59:03,208 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:59:03,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-03-10 21:59:03,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 158. [2021-03-10 21:59:03,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.910828025477707) internal successors, (457), 157 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:03,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 457 transitions. [2021-03-10 21:59:03,222 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 457 transitions. Word has length 18 [2021-03-10 21:59:03,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:03,222 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 457 transitions. [2021-03-10 21:59:03,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:03,222 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 457 transitions. [2021-03-10 21:59:03,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:03,225 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:03,225 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:03,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:03,439 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:03,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:03,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1791011915, now seen corresponding path program 1 times [2021-03-10 21:59:03,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:03,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530707559] [2021-03-10 21:59:03,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:03,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530707559] [2021-03-10 21:59:03,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867895967] [2021-03-10 21:59:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:03,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 21:59:03,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:03,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:03,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:03,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:03,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:03,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:03,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:03,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:03,949 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:03,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:03,953 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:03,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:03,959 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:03,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:03,964 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:03,966 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:03,967 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:03,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:03,973 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:03,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:03,978 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:03,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:03,985 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:04,041 INFO L628 ElimStorePlain]: treesize reduction 99, result has 40.4 percent of original size [2021-03-10 21:59:04,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:59:04,043 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:351, output treesize:67 [2021-03-10 21:59:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:04,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:04,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:59:04,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997150090] [2021-03-10 21:59:04,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:04,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:04,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:04,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:04,261 INFO L87 Difference]: Start difference. First operand 158 states and 457 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:04,860 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-03-10 21:59:05,006 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-03-10 21:59:05,163 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-03-10 21:59:05,324 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-03-10 21:59:05,708 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-03-10 21:59:05,874 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-03-10 21:59:06,042 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-03-10 21:59:06,171 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-03-10 21:59:06,295 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-03-10 21:59:06,464 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-03-10 21:59:06,738 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-03-10 21:59:06,876 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-03-10 21:59:07,015 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-03-10 21:59:07,155 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-03-10 21:59:07,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:07,193 INFO L93 Difference]: Finished difference Result 575 states and 1554 transitions. [2021-03-10 21:59:07,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:59:07,194 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:07,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:07,196 INFO L225 Difference]: With dead ends: 575 [2021-03-10 21:59:07,196 INFO L226 Difference]: Without dead ends: 428 [2021-03-10 21:59:07,196 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 2823.8ms TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:59:07,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-03-10 21:59:07,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 238. [2021-03-10 21:59:07,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.9367088607594938) internal successors, (696), 237 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:07,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 696 transitions. [2021-03-10 21:59:07,203 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 696 transitions. Word has length 19 [2021-03-10 21:59:07,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:07,203 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 696 transitions. [2021-03-10 21:59:07,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:07,203 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 696 transitions. [2021-03-10 21:59:07,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:07,204 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:07,204 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:07,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:07,419 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:07,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:07,419 INFO L82 PathProgramCache]: Analyzing trace with hash -730699061, now seen corresponding path program 2 times [2021-03-10 21:59:07,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:07,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933008098] [2021-03-10 21:59:07,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:07,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933008098] [2021-03-10 21:59:07,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127017747] [2021-03-10 21:59:07,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:07,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:07,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:07,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 21:59:07,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:07,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:07,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:07,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:07,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:07,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:07,698 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:07,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:07,704 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:07,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:07,708 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:07,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:07,715 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:07,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:07,719 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:07,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:07,723 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:07,769 INFO L628 ElimStorePlain]: treesize reduction 66, result has 50.4 percent of original size [2021-03-10 21:59:07,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:59:07,771 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:245, output treesize:67 [2021-03-10 21:59:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:07,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:07,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 14 [2021-03-10 21:59:07,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952505155] [2021-03-10 21:59:07,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:07,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:07,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:07,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:07,944 INFO L87 Difference]: Start difference. First operand 238 states and 696 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:08,463 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 21:59:08,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:08,623 INFO L93 Difference]: Finished difference Result 362 states and 1040 transitions. [2021-03-10 21:59:08,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:08,624 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:08,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:08,625 INFO L225 Difference]: With dead ends: 362 [2021-03-10 21:59:08,625 INFO L226 Difference]: Without dead ends: 307 [2021-03-10 21:59:08,626 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 635.3ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:59:08,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-03-10 21:59:08,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 253. [2021-03-10 21:59:08,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.9523809523809526) internal successors, (744), 252 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 744 transitions. [2021-03-10 21:59:08,633 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 744 transitions. Word has length 19 [2021-03-10 21:59:08,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:08,633 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 744 transitions. [2021-03-10 21:59:08,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:08,633 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 744 transitions. [2021-03-10 21:59:08,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:08,634 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:08,634 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:08,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:08,849 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:08,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:08,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1087878037, now seen corresponding path program 3 times [2021-03-10 21:59:08,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:08,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276632013] [2021-03-10 21:59:08,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:08,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276632013] [2021-03-10 21:59:08,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515902955] [2021-03-10 21:59:08,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:08,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:59:08,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:08,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 21:59:08,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:09,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:09,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:09,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:09,087 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:09,091 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,094 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:09,094 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:09,098 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:09,102 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,105 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:09,106 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 21:59:09,110 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,113 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:09,113 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:09,171 INFO L628 ElimStorePlain]: treesize reduction 68, result has 54.1 percent of original size [2021-03-10 21:59:09,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:59:09,172 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 1 variables, input treesize:317, output treesize:80 [2021-03-10 21:59:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:09,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:09,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 14 [2021-03-10 21:59:09,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106347523] [2021-03-10 21:59:09,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:09,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:09,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:09,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:09,389 INFO L87 Difference]: Start difference. First operand 253 states and 744 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:09,640 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 21:59:09,787 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 21:59:09,957 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-03-10 21:59:10,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:10,093 INFO L93 Difference]: Finished difference Result 376 states and 1077 transitions. [2021-03-10 21:59:10,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:10,094 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:10,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:10,095 INFO L225 Difference]: With dead ends: 376 [2021-03-10 21:59:10,095 INFO L226 Difference]: Without dead ends: 321 [2021-03-10 21:59:10,096 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 710.9ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:59:10,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-03-10 21:59:10,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 250. [2021-03-10 21:59:10,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.9397590361445785) internal successors, (732), 249 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:10,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 732 transitions. [2021-03-10 21:59:10,102 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 732 transitions. Word has length 19 [2021-03-10 21:59:10,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:10,102 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 732 transitions. [2021-03-10 21:59:10,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:10,102 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 732 transitions. [2021-03-10 21:59:10,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:10,103 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:10,103 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:10,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-03-10 21:59:10,318 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:10,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:10,318 INFO L82 PathProgramCache]: Analyzing trace with hash 27099947, now seen corresponding path program 4 times [2021-03-10 21:59:10,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:10,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787489181] [2021-03-10 21:59:10,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:10,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787489181] [2021-03-10 21:59:10,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191195669] [2021-03-10 21:59:10,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:10,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:59:10,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:10,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 21:59:10,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:10,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:10,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:10,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:10,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:10,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:10,579 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:10,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:10,583 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:10,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:10,586 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:10,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:10,590 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:10,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:10,594 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:10,677 INFO L628 ElimStorePlain]: treesize reduction 32, result has 77.0 percent of original size [2021-03-10 21:59:10,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 21:59:10,679 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:235, output treesize:107 [2021-03-10 21:59:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:10,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:10,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-03-10 21:59:10,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780990301] [2021-03-10 21:59:10,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:59:10,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:10,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:59:10,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:59:10,878 INFO L87 Difference]: Start difference. First operand 250 states and 732 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:11,155 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-10 21:59:11,371 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-03-10 21:59:11,495 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-10 21:59:11,691 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-03-10 21:59:11,873 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-03-10 21:59:12,044 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-03-10 21:59:12,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:12,092 INFO L93 Difference]: Finished difference Result 642 states and 1733 transitions. [2021-03-10 21:59:12,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:59:12,092 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:12,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:12,094 INFO L225 Difference]: With dead ends: 642 [2021-03-10 21:59:12,094 INFO L226 Difference]: Without dead ends: 521 [2021-03-10 21:59:12,095 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1175.1ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:59:12,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-03-10 21:59:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 265. [2021-03-10 21:59:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 3.037878787878788) internal successors, (802), 264 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:12,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 802 transitions. [2021-03-10 21:59:12,102 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 802 transitions. Word has length 19 [2021-03-10 21:59:12,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:12,102 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 802 transitions. [2021-03-10 21:59:12,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:12,103 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 802 transitions. [2021-03-10 21:59:12,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:12,103 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:12,103 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:12,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:12,317 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:12,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:12,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1446987595, now seen corresponding path program 5 times [2021-03-10 21:59:12,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:12,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779770868] [2021-03-10 21:59:12,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:12,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:12,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779770868] [2021-03-10 21:59:12,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725833773] [2021-03-10 21:59:12,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:12,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:12,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:12,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 21:59:12,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:12,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:12,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:12,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:12,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:12,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:12,584 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:12,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:12,587 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:12,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:12,591 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:12,627 INFO L628 ElimStorePlain]: treesize reduction 22, result has 72.2 percent of original size [2021-03-10 21:59:12,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:12,628 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:137, output treesize:57 [2021-03-10 21:59:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:12,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:12,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-03-10 21:59:12,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720696351] [2021-03-10 21:59:12,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:59:12,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:12,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:59:12,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:59:12,788 INFO L87 Difference]: Start difference. First operand 265 states and 802 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:13,427 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-03-10 21:59:13,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:13,598 INFO L93 Difference]: Finished difference Result 356 states and 1023 transitions. [2021-03-10 21:59:13,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:59:13,599 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:13,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:13,600 INFO L225 Difference]: With dead ends: 356 [2021-03-10 21:59:13,600 INFO L226 Difference]: Without dead ends: 301 [2021-03-10 21:59:13,600 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 844.8ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:59:13,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-03-10 21:59:13,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 275. [2021-03-10 21:59:13,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.0182481751824817) internal successors, (827), 274 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:13,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 827 transitions. [2021-03-10 21:59:13,620 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 827 transitions. Word has length 19 [2021-03-10 21:59:13,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:13,620 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 827 transitions. [2021-03-10 21:59:13,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:13,620 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 827 transitions. [2021-03-10 21:59:13,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:13,621 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:13,621 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:13,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:13,826 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:13,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:13,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1407466373, now seen corresponding path program 6 times [2021-03-10 21:59:13,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:13,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715536630] [2021-03-10 21:59:13,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:13,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715536630] [2021-03-10 21:59:13,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772718643] [2021-03-10 21:59:13,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:13,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:59:13,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:13,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:59:13,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:14,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:14,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:14,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,109 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:14,109 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:14,112 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 21:59:14,115 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,117 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:14,117 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,119 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:14,120 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:14,143 INFO L628 ElimStorePlain]: treesize reduction 18, result has 64.0 percent of original size [2021-03-10 21:59:14,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:14,143 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:158, output treesize:32 [2021-03-10 21:59:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:14,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:14,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 21:59:14,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346743168] [2021-03-10 21:59:14,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:59:14,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:14,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:59:14,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:59:14,204 INFO L87 Difference]: Start difference. First operand 275 states and 827 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:15,073 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-03-10 21:59:15,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:15,093 INFO L93 Difference]: Finished difference Result 446 states and 1286 transitions. [2021-03-10 21:59:15,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:59:15,093 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:15,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:15,095 INFO L225 Difference]: With dead ends: 446 [2021-03-10 21:59:15,095 INFO L226 Difference]: Without dead ends: 391 [2021-03-10 21:59:15,095 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 821.5ms TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:59:15,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-03-10 21:59:15,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 280. [2021-03-10 21:59:15,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.03584229390681) internal successors, (847), 279 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:15,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 847 transitions. [2021-03-10 21:59:15,101 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 847 transitions. Word has length 19 [2021-03-10 21:59:15,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:15,102 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 847 transitions. [2021-03-10 21:59:15,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:15,102 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 847 transitions. [2021-03-10 21:59:15,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:15,102 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:15,102 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:15,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:15,318 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:15,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:15,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1068923825, now seen corresponding path program 7 times [2021-03-10 21:59:15,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:15,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45419273] [2021-03-10 21:59:15,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:15,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45419273] [2021-03-10 21:59:15,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763618840] [2021-03-10 21:59:15,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:15,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:15,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:59:15,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:15,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:15,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:15,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:15,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:15,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:15,568 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:15,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:15,572 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:15,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:15,576 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:15,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:15,580 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:15,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:15,583 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:15,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:15,587 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:15,649 INFO L628 ElimStorePlain]: treesize reduction 75, result has 51.3 percent of original size [2021-03-10 21:59:15,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:59:15,650 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:269, output treesize:79 [2021-03-10 21:59:15,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:15,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:15,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-03-10 21:59:15,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351570081] [2021-03-10 21:59:15,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:59:15,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:15,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:59:15,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:59:15,787 INFO L87 Difference]: Start difference. First operand 280 states and 847 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:16,531 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-03-10 21:59:16,771 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-03-10 21:59:17,023 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-03-10 21:59:17,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:17,056 INFO L93 Difference]: Finished difference Result 475 states and 1368 transitions. [2021-03-10 21:59:17,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:59:17,056 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:17,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:17,058 INFO L225 Difference]: With dead ends: 475 [2021-03-10 21:59:17,058 INFO L226 Difference]: Without dead ends: 420 [2021-03-10 21:59:17,058 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1155.0ms TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:59:17,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-03-10 21:59:17,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 275. [2021-03-10 21:59:17,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 3.0182481751824817) internal successors, (827), 274 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:17,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 827 transitions. [2021-03-10 21:59:17,065 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 827 transitions. Word has length 19 [2021-03-10 21:59:17,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:17,065 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 827 transitions. [2021-03-10 21:59:17,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:17,065 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 827 transitions. [2021-03-10 21:59:17,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:17,066 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:17,066 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:17,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:17,283 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:17,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:17,284 INFO L82 PathProgramCache]: Analyzing trace with hash -2129701915, now seen corresponding path program 8 times [2021-03-10 21:59:17,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:17,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9800924] [2021-03-10 21:59:17,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:17,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9800924] [2021-03-10 21:59:17,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616084670] [2021-03-10 21:59:17,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:17,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:17,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:17,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 21:59:17,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:17,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:17,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:17,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:17,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:17,519 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:17,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:17,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 21:59:17,523 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:17,526 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:17,526 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:17,529 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:17,529 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:17,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:17,533 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:17,536 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:17,536 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:17,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:17,540 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:17,542 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:17,543 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:17,545 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:17,546 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:17,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:17,549 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:17,551 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:17,552 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:17,601 INFO L628 ElimStorePlain]: treesize reduction 29, result has 70.7 percent of original size [2021-03-10 21:59:17,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:59:17,602 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 1 variables, input treesize:415, output treesize:70 [2021-03-10 21:59:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:17,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:17,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 21:59:17,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933663296] [2021-03-10 21:59:17,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:59:17,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:17,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:59:17,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:59:17,785 INFO L87 Difference]: Start difference. First operand 275 states and 827 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:18,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:18,822 INFO L93 Difference]: Finished difference Result 571 states and 1606 transitions. [2021-03-10 21:59:18,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:59:18,822 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:18,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:18,824 INFO L225 Difference]: With dead ends: 571 [2021-03-10 21:59:18,824 INFO L226 Difference]: Without dead ends: 468 [2021-03-10 21:59:18,824 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 999.4ms TimeCoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:59:18,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-03-10 21:59:18,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 288. [2021-03-10 21:59:18,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 3.034843205574913) internal successors, (871), 287 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:18,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 871 transitions. [2021-03-10 21:59:18,831 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 871 transitions. Word has length 19 [2021-03-10 21:59:18,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:18,831 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 871 transitions. [2021-03-10 21:59:18,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:18,831 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 871 transitions. [2021-03-10 21:59:18,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:18,832 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:18,832 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:19,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:19,047 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:19,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:19,047 INFO L82 PathProgramCache]: Analyzing trace with hash 2108373869, now seen corresponding path program 9 times [2021-03-10 21:59:19,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:19,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335253088] [2021-03-10 21:59:19,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:19,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:19,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335253088] [2021-03-10 21:59:19,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863710255] [2021-03-10 21:59:19,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:19,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:59:19,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:19,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 21:59:19,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:19,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:19,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:19,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:19,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:19,322 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:19,323 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:19,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:19,326 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:19,328 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:19,329 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:19,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 21:59:19,333 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:19,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:19,335 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:19,339 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:19,340 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:19,341 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:19,342 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:19,380 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.1 percent of original size [2021-03-10 21:59:19,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:59:19,381 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:255, output treesize:58 [2021-03-10 21:59:19,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:19,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:19,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-03-10 21:59:19,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859891094] [2021-03-10 21:59:19,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:59:19,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:19,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:59:19,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:19,570 INFO L87 Difference]: Start difference. First operand 288 states and 871 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:20,187 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-10 21:59:20,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:20,744 INFO L93 Difference]: Finished difference Result 565 states and 1535 transitions. [2021-03-10 21:59:20,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:59:20,744 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:20,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:20,746 INFO L225 Difference]: With dead ends: 565 [2021-03-10 21:59:20,746 INFO L226 Difference]: Without dead ends: 451 [2021-03-10 21:59:20,746 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1097.3ms TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:59:20,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-03-10 21:59:20,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 294. [2021-03-10 21:59:20,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.044368600682594) internal successors, (892), 293 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:20,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 892 transitions. [2021-03-10 21:59:20,752 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 892 transitions. Word has length 19 [2021-03-10 21:59:20,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:20,752 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 892 transitions. [2021-03-10 21:59:20,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:20,752 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 892 transitions. [2021-03-10 21:59:20,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:20,753 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:20,753 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:20,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:20,959 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:20,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:20,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1359026097, now seen corresponding path program 10 times [2021-03-10 21:59:20,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:20,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502742263] [2021-03-10 21:59:20,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:21,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502742263] [2021-03-10 21:59:21,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154065886] [2021-03-10 21:59:21,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:21,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:59:21,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:21,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:59:21,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:21,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:21,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:21,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 21:59:21,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:21,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:21,165 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:21,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:21,169 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:21,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:21,174 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:21,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:21,178 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:21,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:21,182 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:21,184 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:21,185 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:21,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:21,188 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:21,191 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:21,192 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:21,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:21,196 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:21,265 INFO L628 ElimStorePlain]: treesize reduction 96, result has 45.1 percent of original size [2021-03-10 21:59:21,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:59:21,266 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:384, output treesize:79 [2021-03-10 21:59:21,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:21,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:21,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 21:59:21,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858421800] [2021-03-10 21:59:21,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:59:21,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:21,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:59:21,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:59:21,385 INFO L87 Difference]: Start difference. First operand 294 states and 892 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:21,690 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-03-10 21:59:21,970 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-03-10 21:59:22,100 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-03-10 21:59:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:22,228 INFO L93 Difference]: Finished difference Result 644 states and 1836 transitions. [2021-03-10 21:59:22,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:59:22,228 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:22,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:22,230 INFO L225 Difference]: With dead ends: 644 [2021-03-10 21:59:22,230 INFO L226 Difference]: Without dead ends: 578 [2021-03-10 21:59:22,230 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 829.7ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:59:22,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-03-10 21:59:22,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 304. [2021-03-10 21:59:22,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.075907590759076) internal successors, (932), 303 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:22,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 932 transitions. [2021-03-10 21:59:22,238 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 932 transitions. Word has length 19 [2021-03-10 21:59:22,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:22,238 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 932 transitions. [2021-03-10 21:59:22,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:22,238 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 932 transitions. [2021-03-10 21:59:22,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:22,239 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:22,239 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:22,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-03-10 21:59:22,455 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:22,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:22,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1516053551, now seen corresponding path program 11 times [2021-03-10 21:59:22,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:22,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003788243] [2021-03-10 21:59:22,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:22,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:22,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003788243] [2021-03-10 21:59:22,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294902379] [2021-03-10 21:59:22,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:22,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:22,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:22,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 21:59:22,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:22,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:22,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:22,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:22,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:22,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:22,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:22,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:22,689 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:22,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:22,691 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:22,728 INFO L628 ElimStorePlain]: treesize reduction 22, result has 72.2 percent of original size [2021-03-10 21:59:22,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:22,728 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:137, output treesize:57 [2021-03-10 21:59:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:22,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:22,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 21:59:22,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234043483] [2021-03-10 21:59:22,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:59:22,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:22,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:59:22,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:59:22,882 INFO L87 Difference]: Start difference. First operand 304 states and 932 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:23,782 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-03-10 21:59:24,047 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-03-10 21:59:24,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:24,184 INFO L93 Difference]: Finished difference Result 694 states and 1944 transitions. [2021-03-10 21:59:24,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:59:24,184 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:24,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:24,186 INFO L225 Difference]: With dead ends: 694 [2021-03-10 21:59:24,186 INFO L226 Difference]: Without dead ends: 544 [2021-03-10 21:59:24,187 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1316.2ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:59:24,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-03-10 21:59:24,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 324. [2021-03-10 21:59:24,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.086687306501548) internal successors, (997), 323 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:24,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 997 transitions. [2021-03-10 21:59:24,193 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 997 transitions. Word has length 19 [2021-03-10 21:59:24,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:24,193 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 997 transitions. [2021-03-10 21:59:24,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:24,193 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 997 transitions. [2021-03-10 21:59:24,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:59:24,194 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:24,194 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:24,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-03-10 21:59:24,407 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:24,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:24,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1718135655, now seen corresponding path program 12 times [2021-03-10 21:59:24,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:24,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986610039] [2021-03-10 21:59:24,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:24,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986610039] [2021-03-10 21:59:24,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339075946] [2021-03-10 21:59:24,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:24,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:59:24,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:24,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 21:59:24,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:24,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:24,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:24,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 21:59:24,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:24,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 21:59:24,637 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:24,640 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:24,640 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:24,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:24,644 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:24,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 21:59:24,648 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:24,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:24,650 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:24,652 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:24,653 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:24,691 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.1 percent of original size [2021-03-10 21:59:24,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 21:59:24,692 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:231, output treesize:58 [2021-03-10 21:59:24,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:24,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:24,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 21:59:24,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232109498] [2021-03-10 21:59:24,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:59:24,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:24,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:59:24,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:59:24,834 INFO L87 Difference]: Start difference. First operand 324 states and 997 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:25,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:25,838 INFO L93 Difference]: Finished difference Result 581 states and 1644 transitions. [2021-03-10 21:59:25,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:59:25,838 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:59:25,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:25,840 INFO L225 Difference]: With dead ends: 581 [2021-03-10 21:59:25,840 INFO L226 Difference]: Without dead ends: 453 [2021-03-10 21:59:25,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 926.0ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:59:25,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-03-10 21:59:25,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 324. [2021-03-10 21:59:25,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.071207430340557) internal successors, (992), 323 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:25,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 992 transitions. [2021-03-10 21:59:25,846 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 992 transitions. Word has length 19 [2021-03-10 21:59:25,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:25,846 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 992 transitions. [2021-03-10 21:59:25,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:25,846 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 992 transitions. [2021-03-10 21:59:25,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:25,847 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:25,847 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:26,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:26,055 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:26,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:26,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1346948354, now seen corresponding path program 13 times [2021-03-10 21:59:26,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:26,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336229002] [2021-03-10 21:59:26,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:26,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:26,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336229002] [2021-03-10 21:59:26,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414663364] [2021-03-10 21:59:26,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:26,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:26,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:26,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:26,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:26,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:26,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:26,211 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 21:59:26,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:26,211 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 21:59:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:26,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:26,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 21:59:26,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122815959] [2021-03-10 21:59:26,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:26,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:26,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:26,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:26,251 INFO L87 Difference]: Start difference. First operand 324 states and 992 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:26,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:26,465 INFO L93 Difference]: Finished difference Result 520 states and 1533 transitions. [2021-03-10 21:59:26,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:26,466 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:26,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:26,468 INFO L225 Difference]: With dead ends: 520 [2021-03-10 21:59:26,468 INFO L226 Difference]: Without dead ends: 468 [2021-03-10 21:59:26,468 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 160.9ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:26,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-03-10 21:59:26,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 320. [2021-03-10 21:59:26,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.09717868338558) internal successors, (988), 319 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:26,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 988 transitions. [2021-03-10 21:59:26,474 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 988 transitions. Word has length 20 [2021-03-10 21:59:26,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:26,474 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 988 transitions. [2021-03-10 21:59:26,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:26,474 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 988 transitions. [2021-03-10 21:59:26,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:26,474 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:26,475 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:26,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-03-10 21:59:26,688 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:26,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:26,689 INFO L82 PathProgramCache]: Analyzing trace with hash -983050181, now seen corresponding path program 14 times [2021-03-10 21:59:26,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:26,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369080686] [2021-03-10 21:59:26,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:26,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369080686] [2021-03-10 21:59:26,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887028161] [2021-03-10 21:59:26,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:26,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:26,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:26,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:59:26,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:26,837 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:26,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:26,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:26,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:26,847 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-03-10 21:59:26,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:26,847 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-03-10 21:59:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:26,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:26,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 21:59:26,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840160464] [2021-03-10 21:59:26,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:59:26,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:26,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:59:26,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:59:26,871 INFO L87 Difference]: Start difference. First operand 320 states and 988 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:27,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:27,078 INFO L93 Difference]: Finished difference Result 549 states and 1593 transitions. [2021-03-10 21:59:27,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:27,078 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:27,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:27,081 INFO L225 Difference]: With dead ends: 549 [2021-03-10 21:59:27,081 INFO L226 Difference]: Without dead ends: 549 [2021-03-10 21:59:27,081 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 184.4ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:27,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-03-10 21:59:27,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 338. [2021-03-10 21:59:27,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.0949554896142435) internal successors, (1043), 337 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:27,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1043 transitions. [2021-03-10 21:59:27,087 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1043 transitions. Word has length 20 [2021-03-10 21:59:27,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:27,088 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 1043 transitions. [2021-03-10 21:59:27,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:27,088 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1043 transitions. [2021-03-10 21:59:27,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:27,088 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:27,088 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:27,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:27,295 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:27,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:27,296 INFO L82 PathProgramCache]: Analyzing trace with hash -2056135561, now seen corresponding path program 15 times [2021-03-10 21:59:27,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:27,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879455219] [2021-03-10 21:59:27,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:27,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879455219] [2021-03-10 21:59:27,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296123951] [2021-03-10 21:59:27,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:27,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:59:27,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:27,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 21:59:27,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:27,451 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:27,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:27,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:27,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:27,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:27,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:27,456 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:21, output treesize:6 [2021-03-10 21:59:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:27,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:27,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:59:27,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647690773] [2021-03-10 21:59:27,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:59:27,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:27,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:59:27,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:59:27,503 INFO L87 Difference]: Start difference. First operand 338 states and 1043 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:27,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:27,733 INFO L93 Difference]: Finished difference Result 581 states and 1659 transitions. [2021-03-10 21:59:27,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:27,733 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:27,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:27,735 INFO L225 Difference]: With dead ends: 581 [2021-03-10 21:59:27,735 INFO L226 Difference]: Without dead ends: 581 [2021-03-10 21:59:27,736 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 231.5ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:27,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-03-10 21:59:27,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 341. [2021-03-10 21:59:27,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.1) internal successors, (1054), 340 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:27,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1054 transitions. [2021-03-10 21:59:27,743 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1054 transitions. Word has length 20 [2021-03-10 21:59:27,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:27,743 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 1054 transitions. [2021-03-10 21:59:27,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:27,743 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1054 transitions. [2021-03-10 21:59:27,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:27,744 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:27,744 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:27,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-03-10 21:59:27,958 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:27,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:27,959 INFO L82 PathProgramCache]: Analyzing trace with hash 177971933, now seen corresponding path program 16 times [2021-03-10 21:59:27,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:27,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763425766] [2021-03-10 21:59:27,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:28,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763425766] [2021-03-10 21:59:28,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365971498] [2021-03-10 21:59:28,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:28,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:59:28,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:28,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:28,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:28,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:28,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:28,110 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-03-10 21:59:28,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:28,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-03-10 21:59:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:28,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:28,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 21:59:28,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42212994] [2021-03-10 21:59:28,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:59:28,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:28,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:59:28,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:59:28,133 INFO L87 Difference]: Start difference. First operand 341 states and 1054 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:28,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:28,349 INFO L93 Difference]: Finished difference Result 545 states and 1571 transitions. [2021-03-10 21:59:28,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:28,350 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:28,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:28,351 INFO L225 Difference]: With dead ends: 545 [2021-03-10 21:59:28,351 INFO L226 Difference]: Without dead ends: 539 [2021-03-10 21:59:28,352 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 203.4ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:28,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-03-10 21:59:28,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 341. [2021-03-10 21:59:28,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0911764705882354) internal successors, (1051), 340 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:28,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1051 transitions. [2021-03-10 21:59:28,359 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1051 transitions. Word has length 20 [2021-03-10 21:59:28,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:28,359 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 1051 transitions. [2021-03-10 21:59:28,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:28,359 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1051 transitions. [2021-03-10 21:59:28,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:28,360 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:28,360 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:28,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-03-10 21:59:28,561 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:28,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:28,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1528996053, now seen corresponding path program 17 times [2021-03-10 21:59:28,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:28,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957169883] [2021-03-10 21:59:28,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:28,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957169883] [2021-03-10 21:59:28,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321187509] [2021-03-10 21:59:28,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:28,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:28,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:28,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:28,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:28,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:28,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:28,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:59:28,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111654598] [2021-03-10 21:59:28,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:59:28,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:28,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:59:28,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:59:28,787 INFO L87 Difference]: Start difference. First operand 341 states and 1051 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:29,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:29,013 INFO L93 Difference]: Finished difference Result 530 states and 1537 transitions. [2021-03-10 21:59:29,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:29,013 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:29,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:29,015 INFO L225 Difference]: With dead ends: 530 [2021-03-10 21:59:29,015 INFO L226 Difference]: Without dead ends: 530 [2021-03-10 21:59:29,015 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:29,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-03-10 21:59:29,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 347. [2021-03-10 21:59:29,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.101156069364162) internal successors, (1073), 346 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:29,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1073 transitions. [2021-03-10 21:59:29,021 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1073 transitions. Word has length 20 [2021-03-10 21:59:29,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:29,021 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 1073 transitions. [2021-03-10 21:59:29,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:29,022 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1073 transitions. [2021-03-10 21:59:29,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:29,022 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:29,022 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:29,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-03-10 21:59:29,235 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:29,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:29,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1272063521, now seen corresponding path program 18 times [2021-03-10 21:59:29,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:29,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085213333] [2021-03-10 21:59:29,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:29,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085213333] [2021-03-10 21:59:29,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930449101] [2021-03-10 21:59:29,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:29,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:59:29,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:29,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:29,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:29,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:29,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:29,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:59:29,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682955977] [2021-03-10 21:59:29,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:59:29,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:29,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:59:29,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:59:29,434 INFO L87 Difference]: Start difference. First operand 347 states and 1073 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:29,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:29,725 INFO L93 Difference]: Finished difference Result 536 states and 1544 transitions. [2021-03-10 21:59:29,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:59:29,726 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:29,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:29,727 INFO L225 Difference]: With dead ends: 536 [2021-03-10 21:59:29,727 INFO L226 Difference]: Without dead ends: 530 [2021-03-10 21:59:29,728 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 288.6ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:59:29,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-03-10 21:59:29,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 344. [2021-03-10 21:59:29,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.0962099125364433) internal successors, (1062), 343 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:29,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1062 transitions. [2021-03-10 21:59:29,734 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1062 transitions. Word has length 20 [2021-03-10 21:59:29,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:29,734 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 1062 transitions. [2021-03-10 21:59:29,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:29,734 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1062 transitions. [2021-03-10 21:59:29,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:29,735 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:29,736 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:29,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-03-10 21:59:29,952 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:29,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:29,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1809919099, now seen corresponding path program 19 times [2021-03-10 21:59:29,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:29,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138088233] [2021-03-10 21:59:29,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:29,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:30,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:30,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138088233] [2021-03-10 21:59:30,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144524370] [2021-03-10 21:59:30,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:30,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:30,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:30,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:30,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:59:30,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35642972] [2021-03-10 21:59:30,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:59:30,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:30,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:59:30,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:59:30,155 INFO L87 Difference]: Start difference. First operand 344 states and 1062 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:30,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:30,381 INFO L93 Difference]: Finished difference Result 494 states and 1449 transitions. [2021-03-10 21:59:30,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:30,381 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:30,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:30,383 INFO L225 Difference]: With dead ends: 494 [2021-03-10 21:59:30,383 INFO L226 Difference]: Without dead ends: 482 [2021-03-10 21:59:30,383 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 247.3ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:30,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-03-10 21:59:30,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 344. [2021-03-10 21:59:30,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.087463556851312) internal successors, (1059), 343 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:30,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1059 transitions. [2021-03-10 21:59:30,388 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1059 transitions. Word has length 20 [2021-03-10 21:59:30,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:30,388 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 1059 transitions. [2021-03-10 21:59:30,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:30,388 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1059 transitions. [2021-03-10 21:59:30,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:30,389 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:30,389 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:30,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:30,598 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:30,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:30,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1880172963, now seen corresponding path program 20 times [2021-03-10 21:59:30,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:30,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232209925] [2021-03-10 21:59:30,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:30,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232209925] [2021-03-10 21:59:30,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192002996] [2021-03-10 21:59:30,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:30,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:30,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:30,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:30,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:30,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:30,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:59:30,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823716205] [2021-03-10 21:59:30,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:59:30,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:30,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:59:30,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:59:30,826 INFO L87 Difference]: Start difference. First operand 344 states and 1059 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:31,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:31,123 INFO L93 Difference]: Finished difference Result 584 states and 1674 transitions. [2021-03-10 21:59:31,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:31,123 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:31,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:31,125 INFO L225 Difference]: With dead ends: 584 [2021-03-10 21:59:31,125 INFO L226 Difference]: Without dead ends: 584 [2021-03-10 21:59:31,125 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 310.9ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:31,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-03-10 21:59:31,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 353. [2021-03-10 21:59:31,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.102272727272727) internal successors, (1092), 352 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:31,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1092 transitions. [2021-03-10 21:59:31,132 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1092 transitions. Word has length 20 [2021-03-10 21:59:31,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:31,132 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 1092 transitions. [2021-03-10 21:59:31,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:31,132 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1092 transitions. [2021-03-10 21:59:31,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:31,133 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:31,133 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:31,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:31,345 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:31,345 INFO L82 PathProgramCache]: Analyzing trace with hash 386265241, now seen corresponding path program 21 times [2021-03-10 21:59:31,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:31,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095931641] [2021-03-10 21:59:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:31,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095931641] [2021-03-10 21:59:31,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328535150] [2021-03-10 21:59:31,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:31,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:59:31,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:31,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:31,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:31,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:31,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:31,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:59:31,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258764558] [2021-03-10 21:59:31,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:59:31,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:31,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:59:31,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:59:31,545 INFO L87 Difference]: Start difference. First operand 353 states and 1092 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:31,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:31,902 INFO L93 Difference]: Finished difference Result 590 states and 1681 transitions. [2021-03-10 21:59:31,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:59:31,902 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:31,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:31,904 INFO L225 Difference]: With dead ends: 590 [2021-03-10 21:59:31,904 INFO L226 Difference]: Without dead ends: 584 [2021-03-10 21:59:31,905 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 358.4ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:59:31,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-03-10 21:59:31,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 350. [2021-03-10 21:59:31,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.097421203438395) internal successors, (1081), 349 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:31,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1081 transitions. [2021-03-10 21:59:31,911 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1081 transitions. Word has length 20 [2021-03-10 21:59:31,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:31,911 INFO L480 AbstractCegarLoop]: Abstraction has 350 states and 1081 transitions. [2021-03-10 21:59:31,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:31,911 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1081 transitions. [2021-03-10 21:59:31,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:31,912 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:31,912 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:32,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-03-10 21:59:32,127 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:32,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:32,127 INFO L82 PathProgramCache]: Analyzing trace with hash 924120819, now seen corresponding path program 22 times [2021-03-10 21:59:32,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:32,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568219114] [2021-03-10 21:59:32,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:32,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568219114] [2021-03-10 21:59:32,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59699407] [2021-03-10 21:59:32,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:32,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:59:32,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:32,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:32,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:32,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:32,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:59:32,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158150716] [2021-03-10 21:59:32,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:59:32,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:32,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:59:32,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:59:32,321 INFO L87 Difference]: Start difference. First operand 350 states and 1081 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:32,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:32,616 INFO L93 Difference]: Finished difference Result 554 states and 1599 transitions. [2021-03-10 21:59:32,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:32,616 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:32,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:32,618 INFO L225 Difference]: With dead ends: 554 [2021-03-10 21:59:32,618 INFO L226 Difference]: Without dead ends: 542 [2021-03-10 21:59:32,618 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 303.4ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:32,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-03-10 21:59:32,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 347. [2021-03-10 21:59:32,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.092485549132948) internal successors, (1070), 346 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:32,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1070 transitions. [2021-03-10 21:59:32,624 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1070 transitions. Word has length 20 [2021-03-10 21:59:32,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:32,624 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 1070 transitions. [2021-03-10 21:59:32,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:32,624 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1070 transitions. [2021-03-10 21:59:32,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:32,625 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:32,625 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:32,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:32,839 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:32,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:32,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1511866141, now seen corresponding path program 23 times [2021-03-10 21:59:32,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:32,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919839235] [2021-03-10 21:59:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:32,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919839235] [2021-03-10 21:59:32,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797924329] [2021-03-10 21:59:32,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:32,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:32,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:32,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:32,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:33,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:33,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:33,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 21:59:33,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083567249] [2021-03-10 21:59:33,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:59:33,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:33,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:59:33,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:59:33,013 INFO L87 Difference]: Start difference. First operand 347 states and 1070 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:33,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:33,280 INFO L93 Difference]: Finished difference Result 545 states and 1575 transitions. [2021-03-10 21:59:33,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:33,280 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:33,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:33,282 INFO L225 Difference]: With dead ends: 545 [2021-03-10 21:59:33,282 INFO L226 Difference]: Without dead ends: 527 [2021-03-10 21:59:33,282 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 255.3ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:33,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-03-10 21:59:33,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 347. [2021-03-10 21:59:33,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.0838150289017343) internal successors, (1067), 346 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1067 transitions. [2021-03-10 21:59:33,287 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1067 transitions. Word has length 20 [2021-03-10 21:59:33,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:33,287 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 1067 transitions. [2021-03-10 21:59:33,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:33,288 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1067 transitions. [2021-03-10 21:59:33,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:33,288 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:33,288 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:33,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:33,503 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:33,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:33,504 INFO L82 PathProgramCache]: Analyzing trace with hash 426307966, now seen corresponding path program 24 times [2021-03-10 21:59:33,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:33,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135669554] [2021-03-10 21:59:33,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:33,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135669554] [2021-03-10 21:59:33,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281124984] [2021-03-10 21:59:33,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:33,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:59:33,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:33,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:33,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:33,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:33,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:33,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:33,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:33,661 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 21:59:33,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:33,661 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 21:59:33,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:33,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:33,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 21:59:33,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489846801] [2021-03-10 21:59:33,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:33,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:33,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:33,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:33,711 INFO L87 Difference]: Start difference. First operand 347 states and 1067 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:33,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:33,919 INFO L93 Difference]: Finished difference Result 502 states and 1514 transitions. [2021-03-10 21:59:33,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:33,920 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:33,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:33,921 INFO L225 Difference]: With dead ends: 502 [2021-03-10 21:59:33,921 INFO L226 Difference]: Without dead ends: 450 [2021-03-10 21:59:33,921 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 169.5ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:33,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-03-10 21:59:33,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 350. [2021-03-10 21:59:33,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.0916905444126073) internal successors, (1079), 349 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:33,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1079 transitions. [2021-03-10 21:59:33,926 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1079 transitions. Word has length 20 [2021-03-10 21:59:33,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:33,927 INFO L480 AbstractCegarLoop]: Abstraction has 350 states and 1079 transitions. [2021-03-10 21:59:33,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:33,927 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1079 transitions. [2021-03-10 21:59:33,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:33,928 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:33,928 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:34,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:34,139 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:34,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:34,139 INFO L82 PathProgramCache]: Analyzing trace with hash 155880641, now seen corresponding path program 25 times [2021-03-10 21:59:34,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:34,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936893368] [2021-03-10 21:59:34,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:34,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936893368] [2021-03-10 21:59:34,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244241839] [2021-03-10 21:59:34,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:34,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:34,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:34,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:34,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:34,322 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-03-10 21:59:34,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:34,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-03-10 21:59:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:34,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:34,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 21:59:34,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819925968] [2021-03-10 21:59:34,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:59:34,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:34,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:59:34,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:59:34,333 INFO L87 Difference]: Start difference. First operand 350 states and 1079 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:34,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:34,500 INFO L93 Difference]: Finished difference Result 567 states and 1639 transitions. [2021-03-10 21:59:34,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:34,500 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:34,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:34,502 INFO L225 Difference]: With dead ends: 567 [2021-03-10 21:59:34,502 INFO L226 Difference]: Without dead ends: 567 [2021-03-10 21:59:34,502 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:59:34,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-03-10 21:59:34,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 345. [2021-03-10 21:59:34,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.0843023255813953) internal successors, (1061), 344 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:34,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1061 transitions. [2021-03-10 21:59:34,515 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1061 transitions. Word has length 20 [2021-03-10 21:59:34,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:34,515 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 1061 transitions. [2021-03-10 21:59:34,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:34,515 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1061 transitions. [2021-03-10 21:59:34,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:34,519 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:34,519 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:34,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:34,734 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:34,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:34,734 INFO L82 PathProgramCache]: Analyzing trace with hash -917204739, now seen corresponding path program 26 times [2021-03-10 21:59:34,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:34,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144699046] [2021-03-10 21:59:34,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:34,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:34,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144699046] [2021-03-10 21:59:34,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859761347] [2021-03-10 21:59:34,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:34,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:34,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:34,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:34,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:34,912 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:34,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:34,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:34,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:34,920 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-03-10 21:59:34,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:34,921 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-03-10 21:59:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:34,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:34,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:59:34,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764569138] [2021-03-10 21:59:34,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:59:34,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:34,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:59:34,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:59:34,943 INFO L87 Difference]: Start difference. First operand 345 states and 1061 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:35,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:35,133 INFO L93 Difference]: Finished difference Result 599 states and 1705 transitions. [2021-03-10 21:59:35,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:35,133 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:35,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:35,135 INFO L225 Difference]: With dead ends: 599 [2021-03-10 21:59:35,135 INFO L226 Difference]: Without dead ends: 599 [2021-03-10 21:59:35,135 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 180.4ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:35,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-03-10 21:59:35,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 342. [2021-03-10 21:59:35,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.070381231671554) internal successors, (1047), 341 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:35,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1047 transitions. [2021-03-10 21:59:35,140 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1047 transitions. Word has length 20 [2021-03-10 21:59:35,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:35,140 INFO L480 AbstractCegarLoop]: Abstraction has 342 states and 1047 transitions. [2021-03-10 21:59:35,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:35,140 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1047 transitions. [2021-03-10 21:59:35,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:35,141 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:35,141 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:35,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-03-10 21:59:35,355 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:35,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:35,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1316902755, now seen corresponding path program 27 times [2021-03-10 21:59:35,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:35,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495427760] [2021-03-10 21:59:35,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:35,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495427760] [2021-03-10 21:59:35,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454496884] [2021-03-10 21:59:35,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:35,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:59:35,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:35,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:35,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:35,519 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:35,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:35,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:35,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:35,528 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-03-10 21:59:35,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 21:59:35,529 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-03-10 21:59:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:35,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:35,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:59:35,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652449079] [2021-03-10 21:59:35,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:59:35,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:35,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:59:35,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:59:35,551 INFO L87 Difference]: Start difference. First operand 342 states and 1047 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:35,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:35,747 INFO L93 Difference]: Finished difference Result 563 states and 1617 transitions. [2021-03-10 21:59:35,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:35,747 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:35,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:35,749 INFO L225 Difference]: With dead ends: 563 [2021-03-10 21:59:35,749 INFO L226 Difference]: Without dead ends: 557 [2021-03-10 21:59:35,749 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 176.9ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:35,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-03-10 21:59:35,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 334. [2021-03-10 21:59:35,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.0720720720720722) internal successors, (1023), 333 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:35,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1023 transitions. [2021-03-10 21:59:35,754 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1023 transitions. Word has length 20 [2021-03-10 21:59:35,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:35,755 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 1023 transitions. [2021-03-10 21:59:35,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:35,755 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1023 transitions. [2021-03-10 21:59:35,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:35,755 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:35,755 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:35,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-03-10 21:59:35,963 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:35,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:35,963 INFO L82 PathProgramCache]: Analyzing trace with hash -390065231, now seen corresponding path program 28 times [2021-03-10 21:59:35,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:35,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197179095] [2021-03-10 21:59:35,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:36,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197179095] [2021-03-10 21:59:36,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566900989] [2021-03-10 21:59:36,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:36,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:59:36,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:36,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:36,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:36,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:36,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:36,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841551920] [2021-03-10 21:59:36,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:36,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:36,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:36,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:36,178 INFO L87 Difference]: Start difference. First operand 334 states and 1023 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:36,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:36,361 INFO L93 Difference]: Finished difference Result 532 states and 1533 transitions. [2021-03-10 21:59:36,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:36,361 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:36,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:36,363 INFO L225 Difference]: With dead ends: 532 [2021-03-10 21:59:36,363 INFO L226 Difference]: Without dead ends: 532 [2021-03-10 21:59:36,363 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 210.9ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:36,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-03-10 21:59:36,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 340. [2021-03-10 21:59:36,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0825958702064895) internal successors, (1045), 339 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:36,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1045 transitions. [2021-03-10 21:59:36,368 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1045 transitions. Word has length 20 [2021-03-10 21:59:36,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:36,368 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 1045 transitions. [2021-03-10 21:59:36,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:36,368 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1045 transitions. [2021-03-10 21:59:36,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:36,369 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:36,369 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:36,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:36,583 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:36,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:36,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1883972953, now seen corresponding path program 29 times [2021-03-10 21:59:36,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:36,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197606571] [2021-03-10 21:59:36,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:36,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:36,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197606571] [2021-03-10 21:59:36,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166665965] [2021-03-10 21:59:36,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:36,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:36,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:36,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:36,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:36,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:36,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:36,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:36,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427649600] [2021-03-10 21:59:36,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:36,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:36,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:36,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:36,819 INFO L87 Difference]: Start difference. First operand 340 states and 1045 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:37,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:37,055 INFO L93 Difference]: Finished difference Result 538 states and 1540 transitions. [2021-03-10 21:59:37,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:59:37,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:37,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:37,057 INFO L225 Difference]: With dead ends: 538 [2021-03-10 21:59:37,057 INFO L226 Difference]: Without dead ends: 532 [2021-03-10 21:59:37,058 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 262.4ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:59:37,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-03-10 21:59:37,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 337. [2021-03-10 21:59:37,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.0773809523809526) internal successors, (1034), 336 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:37,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1034 transitions. [2021-03-10 21:59:37,063 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1034 transitions. Word has length 20 [2021-03-10 21:59:37,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:37,063 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 1034 transitions. [2021-03-10 21:59:37,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:37,063 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1034 transitions. [2021-03-10 21:59:37,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:37,063 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:37,063 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:37,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-03-10 21:59:37,278 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:37,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:37,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1346117375, now seen corresponding path program 30 times [2021-03-10 21:59:37,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:37,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222860295] [2021-03-10 21:59:37,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:37,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:37,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:37,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222860295] [2021-03-10 21:59:37,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916190799] [2021-03-10 21:59:37,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:37,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:59:37,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:37,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:37,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:37,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:37,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:37,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:37,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296558777] [2021-03-10 21:59:37,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:37,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:37,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:37,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:37,512 INFO L87 Difference]: Start difference. First operand 337 states and 1034 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:37,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:37,733 INFO L93 Difference]: Finished difference Result 496 states and 1445 transitions. [2021-03-10 21:59:37,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:37,733 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:37,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:37,735 INFO L225 Difference]: With dead ends: 496 [2021-03-10 21:59:37,735 INFO L226 Difference]: Without dead ends: 484 [2021-03-10 21:59:37,735 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 229.1ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:37,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-03-10 21:59:37,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 329. [2021-03-10 21:59:37,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.0792682926829267) internal successors, (1010), 328 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:37,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1010 transitions. [2021-03-10 21:59:37,740 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1010 transitions. Word has length 20 [2021-03-10 21:59:37,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:37,740 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 1010 transitions. [2021-03-10 21:59:37,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:37,740 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1010 transitions. [2021-03-10 21:59:37,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:37,740 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:37,740 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:37,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-03-10 21:59:37,955 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:37,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:37,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1184106974, now seen corresponding path program 31 times [2021-03-10 21:59:37,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:37,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236923099] [2021-03-10 21:59:37,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:37,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:38,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236923099] [2021-03-10 21:59:38,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545251455] [2021-03-10 21:59:38,000 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:38,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:38,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:38,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:38,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:38,121 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.7 percent of original size [2021-03-10 21:59:38,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 21:59:38,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:38,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:38,131 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:38,149 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-03-10 21:59:38,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:38,150 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:54, output treesize:20 [2021-03-10 21:59:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:38,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:38,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 21:59:38,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977368230] [2021-03-10 21:59:38,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:38,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:38,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:38,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:38,208 INFO L87 Difference]: Start difference. First operand 329 states and 1010 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:38,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:38,490 INFO L93 Difference]: Finished difference Result 522 states and 1544 transitions. [2021-03-10 21:59:38,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:38,490 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:38,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:38,492 INFO L225 Difference]: With dead ends: 522 [2021-03-10 21:59:38,492 INFO L226 Difference]: Without dead ends: 470 [2021-03-10 21:59:38,492 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 225.8ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:38,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-03-10 21:59:38,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 334. [2021-03-10 21:59:38,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.108108108108108) internal successors, (1035), 333 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:38,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1035 transitions. [2021-03-10 21:59:38,497 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1035 transitions. Word has length 20 [2021-03-10 21:59:38,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:38,497 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 1035 transitions. [2021-03-10 21:59:38,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:38,497 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1035 transitions. [2021-03-10 21:59:38,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:38,497 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:38,497 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:38,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:38,712 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:38,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:38,712 INFO L82 PathProgramCache]: Analyzing trace with hash -2101485159, now seen corresponding path program 32 times [2021-03-10 21:59:38,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:38,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595514571] [2021-03-10 21:59:38,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:38,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595514571] [2021-03-10 21:59:38,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823409999] [2021-03-10 21:59:38,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:38,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:38,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:38,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:38,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:38,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 21:59:38,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:38,965 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.4 percent of original size [2021-03-10 21:59:38,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 21:59:38,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:38,997 INFO L628 ElimStorePlain]: treesize reduction 8, result has 83.3 percent of original size [2021-03-10 21:59:39,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:39,000 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:39,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:39,003 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:39,020 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 21:59:39,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:39,020 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:61, output treesize:20 [2021-03-10 21:59:39,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:39,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:39,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:59:39,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388193664] [2021-03-10 21:59:39,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:59:39,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:39,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:59:39,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:59:39,065 INFO L87 Difference]: Start difference. First operand 334 states and 1035 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:39,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:39,450 INFO L93 Difference]: Finished difference Result 661 states and 1899 transitions. [2021-03-10 21:59:39,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:59:39,459 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:39,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:39,461 INFO L225 Difference]: With dead ends: 661 [2021-03-10 21:59:39,462 INFO L226 Difference]: Without dead ends: 661 [2021-03-10 21:59:39,462 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 369.1ms TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:59:39,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-03-10 21:59:39,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 346. [2021-03-10 21:59:39,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.118840579710145) internal successors, (1076), 345 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:39,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1076 transitions. [2021-03-10 21:59:39,467 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1076 transitions. Word has length 20 [2021-03-10 21:59:39,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:39,467 INFO L480 AbstractCegarLoop]: Abstraction has 346 states and 1076 transitions. [2021-03-10 21:59:39,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:39,467 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1076 transitions. [2021-03-10 21:59:39,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:39,468 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:39,468 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:39,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-03-10 21:59:39,669 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:39,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:39,670 INFO L82 PathProgramCache]: Analyzing trace with hash -942841629, now seen corresponding path program 33 times [2021-03-10 21:59:39,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:39,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738396136] [2021-03-10 21:59:39,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:39,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738396136] [2021-03-10 21:59:39,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171655509] [2021-03-10 21:59:39,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:39,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:59:39,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:39,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:39,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:39,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 21:59:39,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:39,873 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2021-03-10 21:59:39,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:39,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:39,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:39,879 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:39,895 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 21:59:39,895 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 21:59:39,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:39,896 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-03-10 21:59:39,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:39,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:39,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:59:39,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688049163] [2021-03-10 21:59:39,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:59:39,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:39,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:59:39,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:59:39,938 INFO L87 Difference]: Start difference. First operand 346 states and 1076 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:40,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:40,229 INFO L93 Difference]: Finished difference Result 713 states and 2020 transitions. [2021-03-10 21:59:40,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:40,229 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:40,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:40,231 INFO L225 Difference]: With dead ends: 713 [2021-03-10 21:59:40,231 INFO L226 Difference]: Without dead ends: 713 [2021-03-10 21:59:40,231 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 269.3ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:40,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-03-10 21:59:40,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 352. [2021-03-10 21:59:40,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.1367521367521367) internal successors, (1101), 351 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:40,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1101 transitions. [2021-03-10 21:59:40,237 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1101 transitions. Word has length 20 [2021-03-10 21:59:40,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:40,237 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 1101 transitions. [2021-03-10 21:59:40,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:40,237 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1101 transitions. [2021-03-10 21:59:40,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:40,237 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:40,238 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:40,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:40,438 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:40,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:40,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1858217945, now seen corresponding path program 34 times [2021-03-10 21:59:40,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:40,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811641873] [2021-03-10 21:59:40,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:40,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811641873] [2021-03-10 21:59:40,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315047740] [2021-03-10 21:59:40,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:40,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:59:40,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:40,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:40,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:40,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 21:59:40,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:40,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:40,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:40,617 INFO L628 ElimStorePlain]: treesize reduction 11, result has 71.1 percent of original size [2021-03-10 21:59:40,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:40,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:40,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:40,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:40,628 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-03-10 21:59:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:40,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:40,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:59:40,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837928279] [2021-03-10 21:59:40,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:59:40,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:40,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:59:40,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:59:40,669 INFO L87 Difference]: Start difference. First operand 352 states and 1101 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:40,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:40,906 INFO L93 Difference]: Finished difference Result 670 states and 1911 transitions. [2021-03-10 21:59:40,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:40,906 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:40,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:40,907 INFO L225 Difference]: With dead ends: 670 [2021-03-10 21:59:40,907 INFO L226 Difference]: Without dead ends: 664 [2021-03-10 21:59:40,908 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 236.1ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:59:40,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-03-10 21:59:40,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 350. [2021-03-10 21:59:40,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.1232091690544412) internal successors, (1090), 349 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:40,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1090 transitions. [2021-03-10 21:59:40,913 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1090 transitions. Word has length 20 [2021-03-10 21:59:40,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:40,913 INFO L480 AbstractCegarLoop]: Abstraction has 350 states and 1090 transitions. [2021-03-10 21:59:40,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:40,914 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1090 transitions. [2021-03-10 21:59:40,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:40,914 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:40,914 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:41,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:41,115 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:41,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:41,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1690972674, now seen corresponding path program 35 times [2021-03-10 21:59:41,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:41,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665259042] [2021-03-10 21:59:41,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:41,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665259042] [2021-03-10 21:59:41,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477049617] [2021-03-10 21:59:41,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:41,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:59:41,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:41,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:41,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:41,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:41,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:41,246 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:41,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:41,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 21:59:41,249 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:41,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:41,251 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:41,268 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-03-10 21:59:41,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:41,269 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-03-10 21:59:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:41,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:41,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 21:59:41,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818658908] [2021-03-10 21:59:41,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:41,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:41,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:41,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:41,320 INFO L87 Difference]: Start difference. First operand 350 states and 1090 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:41,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:41,578 INFO L93 Difference]: Finished difference Result 455 states and 1360 transitions. [2021-03-10 21:59:41,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:41,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:41,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:41,579 INFO L225 Difference]: With dead ends: 455 [2021-03-10 21:59:41,579 INFO L226 Difference]: Without dead ends: 393 [2021-03-10 21:59:41,579 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:41,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-03-10 21:59:41,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 341. [2021-03-10 21:59:41,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.085294117647059) internal successors, (1049), 340 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:41,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1049 transitions. [2021-03-10 21:59:41,584 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1049 transitions. Word has length 20 [2021-03-10 21:59:41,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:41,584 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 1049 transitions. [2021-03-10 21:59:41,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:41,584 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1049 transitions. [2021-03-10 21:59:41,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:41,584 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:41,585 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:41,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:41,785 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:41,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:41,785 INFO L82 PathProgramCache]: Analyzing trace with hash -282908061, now seen corresponding path program 36 times [2021-03-10 21:59:41,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:41,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113464118] [2021-03-10 21:59:41,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:41,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113464118] [2021-03-10 21:59:41,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302667069] [2021-03-10 21:59:41,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:41,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:59:41,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:41,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:41,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:41,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 21:59:41,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:41,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:41,944 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:41,964 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-03-10 21:59:41,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:41,966 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:41,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:41,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:41,974 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-03-10 21:59:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:42,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:42,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:42,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342212329] [2021-03-10 21:59:42,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:42,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:42,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:42,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:42,023 INFO L87 Difference]: Start difference. First operand 341 states and 1049 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:42,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:42,278 INFO L93 Difference]: Finished difference Result 614 states and 1777 transitions. [2021-03-10 21:59:42,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:42,278 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:42,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:42,279 INFO L225 Difference]: With dead ends: 614 [2021-03-10 21:59:42,279 INFO L226 Difference]: Without dead ends: 614 [2021-03-10 21:59:42,279 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 234.2ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:42,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-03-10 21:59:42,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 331. [2021-03-10 21:59:42,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 3.084848484848485) internal successors, (1018), 330 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:42,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1018 transitions. [2021-03-10 21:59:42,284 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1018 transitions. Word has length 20 [2021-03-10 21:59:42,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:42,285 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 1018 transitions. [2021-03-10 21:59:42,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:42,285 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1018 transitions. [2021-03-10 21:59:42,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:42,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:42,285 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:42,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:42,486 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:42,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:42,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1350143331, now seen corresponding path program 37 times [2021-03-10 21:59:42,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:42,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628336201] [2021-03-10 21:59:42,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:42,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628336201] [2021-03-10 21:59:42,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520482148] [2021-03-10 21:59:42,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:42,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:42,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:42,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:42,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:42,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:42,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:42,714 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.0 percent of original size [2021-03-10 21:59:42,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:42,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:42,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:42,720 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:42,749 INFO L628 ElimStorePlain]: treesize reduction 10, result has 77.3 percent of original size [2021-03-10 21:59:42,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 21:59:42,752 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:42,770 INFO L628 ElimStorePlain]: treesize reduction 8, result has 71.4 percent of original size [2021-03-10 21:59:42,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:42,771 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:85, output treesize:20 [2021-03-10 21:59:42,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:42,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:42,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:42,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140803623] [2021-03-10 21:59:42,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:42,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:42,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:42,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:42,839 INFO L87 Difference]: Start difference. First operand 331 states and 1018 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:43,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:43,245 INFO L93 Difference]: Finished difference Result 610 states and 1761 transitions. [2021-03-10 21:59:43,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:59:43,245 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:43,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:43,246 INFO L225 Difference]: With dead ends: 610 [2021-03-10 21:59:43,246 INFO L226 Difference]: Without dead ends: 610 [2021-03-10 21:59:43,246 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 388.8ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:59:43,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-03-10 21:59:43,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 334. [2021-03-10 21:59:43,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.1021021021021022) internal successors, (1033), 333 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:43,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1033 transitions. [2021-03-10 21:59:43,251 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1033 transitions. Word has length 20 [2021-03-10 21:59:43,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:43,252 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 1033 transitions. [2021-03-10 21:59:43,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:43,252 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1033 transitions. [2021-03-10 21:59:43,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:43,252 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:43,252 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:43,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:43,453 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:43,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:43,453 INFO L82 PathProgramCache]: Analyzing trace with hash -606993625, now seen corresponding path program 38 times [2021-03-10 21:59:43,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:43,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478853033] [2021-03-10 21:59:43,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:43,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478853033] [2021-03-10 21:59:43,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719803677] [2021-03-10 21:59:43,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:43,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:43,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:43,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:43,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:43,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 21:59:43,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:43,647 INFO L628 ElimStorePlain]: treesize reduction 30, result has 57.1 percent of original size [2021-03-10 21:59:43,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:43,650 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:43,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:43,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:43,664 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:43,680 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 21:59:43,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:43,681 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-03-10 21:59:43,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:43,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:43,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:43,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268821863] [2021-03-10 21:59:43,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:43,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:43,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:43,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:43,746 INFO L87 Difference]: Start difference. First operand 334 states and 1033 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:44,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:44,029 INFO L93 Difference]: Finished difference Result 548 states and 1618 transitions. [2021-03-10 21:59:44,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:44,030 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:44,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:44,031 INFO L225 Difference]: With dead ends: 548 [2021-03-10 21:59:44,031 INFO L226 Difference]: Without dead ends: 548 [2021-03-10 21:59:44,031 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 276.1ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:44,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-03-10 21:59:44,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 334. [2021-03-10 21:59:44,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.1021021021021022) internal successors, (1033), 333 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:44,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1033 transitions. [2021-03-10 21:59:44,035 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1033 transitions. Word has length 20 [2021-03-10 21:59:44,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:44,036 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 1033 transitions. [2021-03-10 21:59:44,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:44,036 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1033 transitions. [2021-03-10 21:59:44,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:44,036 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:44,036 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:44,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:44,239 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:44,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:44,240 INFO L82 PathProgramCache]: Analyzing trace with hash 681956465, now seen corresponding path program 39 times [2021-03-10 21:59:44,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:44,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56051823] [2021-03-10 21:59:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:44,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56051823] [2021-03-10 21:59:44,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571578607] [2021-03-10 21:59:44,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:44,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:59:44,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:44,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:44,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:44,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:44,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:44,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:44,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:44,472 INFO L628 ElimStorePlain]: treesize reduction 14, result has 78.1 percent of original size [2021-03-10 21:59:44,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 21:59:44,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:44,500 INFO L628 ElimStorePlain]: treesize reduction 24, result has 45.5 percent of original size [2021-03-10 21:59:44,500 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 21:59:44,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:44,501 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-03-10 21:59:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:44,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:44,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:44,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424645421] [2021-03-10 21:59:44,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:44,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:44,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:44,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:44,583 INFO L87 Difference]: Start difference. First operand 334 states and 1033 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:44,904 INFO L93 Difference]: Finished difference Result 658 states and 1902 transitions. [2021-03-10 21:59:44,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:44,911 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:44,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:44,912 INFO L225 Difference]: With dead ends: 658 [2021-03-10 21:59:44,912 INFO L226 Difference]: Without dead ends: 658 [2021-03-10 21:59:44,912 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 332.0ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:44,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-03-10 21:59:44,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 342. [2021-03-10 21:59:44,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.134897360703812) internal successors, (1069), 341 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:44,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1069 transitions. [2021-03-10 21:59:44,918 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1069 transitions. Word has length 20 [2021-03-10 21:59:44,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:44,918 INFO L480 AbstractCegarLoop]: Abstraction has 342 states and 1069 transitions. [2021-03-10 21:59:44,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:44,918 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1069 transitions. [2021-03-10 21:59:44,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:44,919 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:44,919 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:45,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-03-10 21:59:45,131 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:45,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:45,131 INFO L82 PathProgramCache]: Analyzing trace with hash -811951257, now seen corresponding path program 40 times [2021-03-10 21:59:45,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:45,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598951343] [2021-03-10 21:59:45,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:45,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598951343] [2021-03-10 21:59:45,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958010605] [2021-03-10 21:59:45,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:45,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:59:45,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:45,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:45,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:45,293 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:45,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:45,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:45,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:45,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:45,299 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:45,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:45,302 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:45,332 INFO L628 ElimStorePlain]: treesize reduction 14, result has 70.8 percent of original size [2021-03-10 21:59:45,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 21:59:45,335 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:45,353 INFO L628 ElimStorePlain]: treesize reduction 8, result has 71.4 percent of original size [2021-03-10 21:59:45,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:45,354 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:90, output treesize:20 [2021-03-10 21:59:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:45,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:45,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:45,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486558295] [2021-03-10 21:59:45,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:45,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:45,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:45,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:45,429 INFO L87 Difference]: Start difference. First operand 342 states and 1069 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:45,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:45,724 INFO L93 Difference]: Finished difference Result 644 states and 1851 transitions. [2021-03-10 21:59:45,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:45,726 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:45,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:45,727 INFO L225 Difference]: With dead ends: 644 [2021-03-10 21:59:45,727 INFO L226 Difference]: Without dead ends: 638 [2021-03-10 21:59:45,728 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 321.7ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:45,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-03-10 21:59:45,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 345. [2021-03-10 21:59:45,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.113372093023256) internal successors, (1071), 344 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:45,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1071 transitions. [2021-03-10 21:59:45,734 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1071 transitions. Word has length 20 [2021-03-10 21:59:45,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:45,734 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 1071 transitions. [2021-03-10 21:59:45,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:45,734 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1071 transitions. [2021-03-10 21:59:45,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:45,734 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:45,734 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:45,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-03-10 21:59:45,943 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:45,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:45,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1433356903, now seen corresponding path program 41 times [2021-03-10 21:59:45,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:45,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707204998] [2021-03-10 21:59:45,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:45,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:45,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707204998] [2021-03-10 21:59:46,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95076483] [2021-03-10 21:59:46,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:46,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:59:46,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:46,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:46,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:46,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 21:59:46,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:46,170 INFO L628 ElimStorePlain]: treesize reduction 39, result has 50.6 percent of original size [2021-03-10 21:59:46,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:46,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:46,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:46,182 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:46,198 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 21:59:46,199 INFO L518 ElimStorePlain]: Eliminatee v_prenex_15 vanished before elimination [2021-03-10 21:59:46,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:46,199 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:85, output treesize:20 [2021-03-10 21:59:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:46,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:46,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:46,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170707000] [2021-03-10 21:59:46,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:46,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:46,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:46,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:46,280 INFO L87 Difference]: Start difference. First operand 345 states and 1071 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:46,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:46,719 INFO L93 Difference]: Finished difference Result 689 states and 1966 transitions. [2021-03-10 21:59:46,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:59:46,719 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:46,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:46,721 INFO L225 Difference]: With dead ends: 689 [2021-03-10 21:59:46,721 INFO L226 Difference]: Without dead ends: 689 [2021-03-10 21:59:46,721 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 428.6ms TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:59:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-03-10 21:59:46,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 338. [2021-03-10 21:59:46,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.1246290801186944) internal successors, (1053), 337 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:46,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1053 transitions. [2021-03-10 21:59:46,726 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1053 transitions. Word has length 20 [2021-03-10 21:59:46,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:46,727 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 1053 transitions. [2021-03-10 21:59:46,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:46,727 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1053 transitions. [2021-03-10 21:59:46,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:46,727 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:46,727 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:46,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-03-10 21:59:46,928 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:46,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:46,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1569267993, now seen corresponding path program 42 times [2021-03-10 21:59:46,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:46,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606230621] [2021-03-10 21:59:46,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:46,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606230621] [2021-03-10 21:59:46,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894003658] [2021-03-10 21:59:46,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:47,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:59:47,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:47,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:47,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:47,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:47,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:47,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 21:59:47,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:47,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:59:47,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 21:59:47,139 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:47,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:47,142 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:47,161 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-03-10 21:59:47,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:47,161 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-03-10 21:59:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:47,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:47,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:47,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787243320] [2021-03-10 21:59:47,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:47,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:47,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:47,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:47,239 INFO L87 Difference]: Start difference. First operand 338 states and 1053 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:47,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:47,515 INFO L93 Difference]: Finished difference Result 623 states and 1818 transitions. [2021-03-10 21:59:47,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:47,515 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:47,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:47,516 INFO L225 Difference]: With dead ends: 623 [2021-03-10 21:59:47,516 INFO L226 Difference]: Without dead ends: 623 [2021-03-10 21:59:47,517 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 313.3ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:47,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-03-10 21:59:47,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 335. [2021-03-10 21:59:47,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.1077844311377247) internal successors, (1038), 334 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:47,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1038 transitions. [2021-03-10 21:59:47,522 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1038 transitions. Word has length 20 [2021-03-10 21:59:47,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:47,522 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 1038 transitions. [2021-03-10 21:59:47,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:47,522 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1038 transitions. [2021-03-10 21:59:47,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:47,522 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:47,522 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:47,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-03-10 21:59:47,723 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:47,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:47,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1454093431, now seen corresponding path program 43 times [2021-03-10 21:59:47,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:47,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96032121] [2021-03-10 21:59:47,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:47,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96032121] [2021-03-10 21:59:47,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301490378] [2021-03-10 21:59:47,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:47,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:47,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:47,882 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 21:59:47,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:47,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:47,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:47,929 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.6 percent of original size [2021-03-10 21:59:47,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 21:59:47,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:47,958 INFO L628 ElimStorePlain]: treesize reduction 17, result has 66.0 percent of original size [2021-03-10 21:59:47,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:47,960 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:47,977 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 21:59:47,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:47,977 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-03-10 21:59:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:48,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:48,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:48,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570953418] [2021-03-10 21:59:48,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:48,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:48,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:48,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:48,051 INFO L87 Difference]: Start difference. First operand 335 states and 1038 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:48,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:48,450 INFO L93 Difference]: Finished difference Result 595 states and 1720 transitions. [2021-03-10 21:59:48,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:59:48,450 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:48,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:48,451 INFO L225 Difference]: With dead ends: 595 [2021-03-10 21:59:48,451 INFO L226 Difference]: Without dead ends: 589 [2021-03-10 21:59:48,451 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 401.6ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:59:48,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-03-10 21:59:48,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 345. [2021-03-10 21:59:48,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.0959302325581395) internal successors, (1065), 344 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:48,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1065 transitions. [2021-03-10 21:59:48,457 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1065 transitions. Word has length 20 [2021-03-10 21:59:48,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:48,457 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 1065 transitions. [2021-03-10 21:59:48,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1065 transitions. [2021-03-10 21:59:48,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:48,457 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:48,458 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:48,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:48,671 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:48,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:48,671 INFO L82 PathProgramCache]: Analyzing trace with hash -461330495, now seen corresponding path program 44 times [2021-03-10 21:59:48,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:48,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940461639] [2021-03-10 21:59:48,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:48,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:48,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940461639] [2021-03-10 21:59:48,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126392063] [2021-03-10 21:59:48,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:48,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:48,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:48,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:48,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:48,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 21:59:48,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:48,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:48,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:48,889 INFO L628 ElimStorePlain]: treesize reduction 15, result has 77.3 percent of original size [2021-03-10 21:59:48,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 21:59:48,892 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:48,921 INFO L628 ElimStorePlain]: treesize reduction 9, result has 79.5 percent of original size [2021-03-10 21:59:48,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 21:59:48,924 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 21:59:48,942 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-03-10 21:59:48,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 21:59:48,942 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:85, output treesize:20 [2021-03-10 21:59:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:49,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:49,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:49,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452073447] [2021-03-10 21:59:49,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:49,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:49,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:49,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:49,024 INFO L87 Difference]: Start difference. First operand 345 states and 1065 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:49,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:49,280 INFO L93 Difference]: Finished difference Result 566 states and 1666 transitions. [2021-03-10 21:59:49,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:49,280 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:49,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:49,281 INFO L225 Difference]: With dead ends: 566 [2021-03-10 21:59:49,281 INFO L226 Difference]: Without dead ends: 566 [2021-03-10 21:59:49,281 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 288.3ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:49,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-03-10 21:59:49,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 337. [2021-03-10 21:59:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.1041666666666665) internal successors, (1043), 336 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:49,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1043 transitions. [2021-03-10 21:59:49,286 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1043 transitions. Word has length 20 [2021-03-10 21:59:49,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:49,286 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 1043 transitions. [2021-03-10 21:59:49,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:49,286 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1043 transitions. [2021-03-10 21:59:49,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:49,287 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:49,287 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:49,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:49,489 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:49,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:49,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1560931869, now seen corresponding path program 45 times [2021-03-10 21:59:49,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:49,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375303292] [2021-03-10 21:59:49,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:49,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375303292] [2021-03-10 21:59:49,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836732932] [2021-03-10 21:59:49,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:49,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:59:49,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:49,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:49,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:49,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:49,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:49,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383773403] [2021-03-10 21:59:49,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:49,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:49,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:49,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:49,735 INFO L87 Difference]: Start difference. First operand 337 states and 1043 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:49,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:49,987 INFO L93 Difference]: Finished difference Result 543 states and 1592 transitions. [2021-03-10 21:59:49,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:49,987 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:49,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:49,988 INFO L225 Difference]: With dead ends: 543 [2021-03-10 21:59:49,988 INFO L226 Difference]: Without dead ends: 543 [2021-03-10 21:59:49,988 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 286.7ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:49,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-03-10 21:59:49,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 344. [2021-03-10 21:59:49,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.119533527696793) internal successors, (1070), 343 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:49,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1070 transitions. [2021-03-10 21:59:49,993 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1070 transitions. Word has length 20 [2021-03-10 21:59:49,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:49,993 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 1070 transitions. [2021-03-10 21:59:49,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:49,993 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1070 transitions. [2021-03-10 21:59:49,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:49,994 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:49,994 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:50,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:50,194 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:50,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:50,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1240127705, now seen corresponding path program 46 times [2021-03-10 21:59:50,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:50,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186777944] [2021-03-10 21:59:50,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:50,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186777944] [2021-03-10 21:59:50,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251412597] [2021-03-10 21:59:50,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:50,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:59:50,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:50,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:50,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:50,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:50,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:50,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891642133] [2021-03-10 21:59:50,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:50,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:50,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:50,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:50,437 INFO L87 Difference]: Start difference. First operand 344 states and 1070 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:50,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:50,765 INFO L93 Difference]: Finished difference Result 549 states and 1599 transitions. [2021-03-10 21:59:50,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:59:50,765 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:50,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:50,767 INFO L225 Difference]: With dead ends: 549 [2021-03-10 21:59:50,767 INFO L226 Difference]: Without dead ends: 543 [2021-03-10 21:59:50,767 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 345.8ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:59:50,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-03-10 21:59:50,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 341. [2021-03-10 21:59:50,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.114705882352941) internal successors, (1059), 340 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:50,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1059 transitions. [2021-03-10 21:59:50,772 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1059 transitions. Word has length 20 [2021-03-10 21:59:50,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:50,772 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 1059 transitions. [2021-03-10 21:59:50,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:50,772 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1059 transitions. [2021-03-10 21:59:50,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:50,773 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:50,773 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:50,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-03-10 21:59:50,986 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:50,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:50,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1777983283, now seen corresponding path program 47 times [2021-03-10 21:59:50,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:50,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463890294] [2021-03-10 21:59:50,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:51,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463890294] [2021-03-10 21:59:51,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113455200] [2021-03-10 21:59:51,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:51,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:51,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:51,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:51,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:51,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:51,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:51,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608357276] [2021-03-10 21:59:51,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:51,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:51,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:51,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:51,234 INFO L87 Difference]: Start difference. First operand 341 states and 1059 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:51,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:51,548 INFO L93 Difference]: Finished difference Result 513 states and 1517 transitions. [2021-03-10 21:59:51,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:51,548 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:51,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:51,549 INFO L225 Difference]: With dead ends: 513 [2021-03-10 21:59:51,549 INFO L226 Difference]: Without dead ends: 501 [2021-03-10 21:59:51,549 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 332.4ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:51,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-03-10 21:59:51,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 338. [2021-03-10 21:59:51,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.1097922848664687) internal successors, (1048), 337 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:51,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1048 transitions. [2021-03-10 21:59:51,553 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1048 transitions. Word has length 20 [2021-03-10 21:59:51,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:51,553 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 1048 transitions. [2021-03-10 21:59:51,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:51,554 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1048 transitions. [2021-03-10 21:59:51,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:51,554 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:51,554 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:51,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-03-10 21:59:51,755 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:51,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:51,755 INFO L82 PathProgramCache]: Analyzing trace with hash 257645229, now seen corresponding path program 48 times [2021-03-10 21:59:51,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:51,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633173064] [2021-03-10 21:59:51,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:51,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:51,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633173064] [2021-03-10 21:59:51,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086089245] [2021-03-10 21:59:51,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:51,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:59:51,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:51,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:51,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:52,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:52,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:52,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81998638] [2021-03-10 21:59:52,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:52,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:52,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:52,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:52,011 INFO L87 Difference]: Start difference. First operand 338 states and 1048 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:52,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:52,382 INFO L93 Difference]: Finished difference Result 627 states and 1802 transitions. [2021-03-10 21:59:52,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:59:52,383 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:52,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:52,384 INFO L225 Difference]: With dead ends: 627 [2021-03-10 21:59:52,384 INFO L226 Difference]: Without dead ends: 627 [2021-03-10 21:59:52,385 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 405.0ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:59:52,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-03-10 21:59:52,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 346. [2021-03-10 21:59:52,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.1420289855072463) internal successors, (1084), 345 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:52,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1084 transitions. [2021-03-10 21:59:52,391 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1084 transitions. Word has length 20 [2021-03-10 21:59:52,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:52,391 INFO L480 AbstractCegarLoop]: Abstraction has 346 states and 1084 transitions. [2021-03-10 21:59:52,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:52,391 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1084 transitions. [2021-03-10 21:59:52,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:52,392 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:52,392 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:52,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-03-10 21:59:52,607 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:52,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:52,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1236262493, now seen corresponding path program 49 times [2021-03-10 21:59:52,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:52,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599645314] [2021-03-10 21:59:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:52,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599645314] [2021-03-10 21:59:52,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971722637] [2021-03-10 21:59:52,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:52,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:52,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:52,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:52,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:52,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:52,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655337136] [2021-03-10 21:59:52,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:52,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:52,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:52,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:52,876 INFO L87 Difference]: Start difference. First operand 346 states and 1084 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:53,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:53,320 INFO L93 Difference]: Finished difference Result 633 states and 1803 transitions. [2021-03-10 21:59:53,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:59:53,321 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:53,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:53,322 INFO L225 Difference]: With dead ends: 633 [2021-03-10 21:59:53,322 INFO L226 Difference]: Without dead ends: 627 [2021-03-10 21:59:53,322 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 463.9ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:59:53,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-03-10 21:59:53,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 349. [2021-03-10 21:59:53,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1206896551724137) internal successors, (1086), 348 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:53,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1086 transitions. [2021-03-10 21:59:53,327 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1086 transitions. Word has length 20 [2021-03-10 21:59:53,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:53,328 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 1086 transitions. [2021-03-10 21:59:53,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:53,328 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1086 transitions. [2021-03-10 21:59:53,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:53,328 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:53,328 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:53,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable548 [2021-03-10 21:59:53,543 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:53,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:53,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1009045667, now seen corresponding path program 50 times [2021-03-10 21:59:53,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:53,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941107838] [2021-03-10 21:59:53,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:53,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941107838] [2021-03-10 21:59:53,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595390607] [2021-03-10 21:59:53,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:53,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:53,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:53,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:53,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:53,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:53,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:53,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108591802] [2021-03-10 21:59:53,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:53,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:53,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:53,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:53,806 INFO L87 Difference]: Start difference. First operand 349 states and 1086 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:54,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:54,141 INFO L93 Difference]: Finished difference Result 624 states and 1789 transitions. [2021-03-10 21:59:54,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:59:54,141 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:54,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:54,142 INFO L225 Difference]: With dead ends: 624 [2021-03-10 21:59:54,142 INFO L226 Difference]: Without dead ends: 624 [2021-03-10 21:59:54,142 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 382.9ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:59:54,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-03-10 21:59:54,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 342. [2021-03-10 21:59:54,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.131964809384164) internal successors, (1068), 341 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:54,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1068 transitions. [2021-03-10 21:59:54,148 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1068 transitions. Word has length 20 [2021-03-10 21:59:54,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:54,148 INFO L480 AbstractCegarLoop]: Abstraction has 342 states and 1068 transitions. [2021-03-10 21:59:54,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:54,148 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1068 transitions. [2021-03-10 21:59:54,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:54,148 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:54,149 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:54,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2021-03-10 21:59:54,349 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:54,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:54,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1993579229, now seen corresponding path program 51 times [2021-03-10 21:59:54,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:54,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369431863] [2021-03-10 21:59:54,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:54,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:54,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369431863] [2021-03-10 21:59:54,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904763783] [2021-03-10 21:59:54,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:54,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:59:54,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:54,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:54,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:54,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:54,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:54,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653985819] [2021-03-10 21:59:54,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:54,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:54,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:54,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:54,599 INFO L87 Difference]: Start difference. First operand 342 states and 1068 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:54,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:54,825 INFO L93 Difference]: Finished difference Result 558 states and 1641 transitions. [2021-03-10 21:59:54,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:54,826 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:54,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:54,827 INFO L225 Difference]: With dead ends: 558 [2021-03-10 21:59:54,827 INFO L226 Difference]: Without dead ends: 558 [2021-03-10 21:59:54,827 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 231.9ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:54,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-03-10 21:59:54,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 339. [2021-03-10 21:59:54,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.1153846153846154) internal successors, (1053), 338 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:54,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1053 transitions. [2021-03-10 21:59:54,832 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1053 transitions. Word has length 20 [2021-03-10 21:59:54,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:54,832 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 1053 transitions. [2021-03-10 21:59:54,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:54,832 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1053 transitions. [2021-03-10 21:59:54,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:54,833 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:54,833 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:55,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-03-10 21:59:55,033 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:55,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1029782195, now seen corresponding path program 52 times [2021-03-10 21:59:55,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:55,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625335914] [2021-03-10 21:59:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:55,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625335914] [2021-03-10 21:59:55,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170658725] [2021-03-10 21:59:55,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:55,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:59:55,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:55,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:55,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:55,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:55,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:55,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850997961] [2021-03-10 21:59:55,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:55,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:55,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:55,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:55,270 INFO L87 Difference]: Start difference. First operand 339 states and 1053 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:55,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:55,784 INFO L93 Difference]: Finished difference Result 601 states and 1730 transitions. [2021-03-10 21:59:55,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:59:55,784 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:55,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:55,785 INFO L225 Difference]: With dead ends: 601 [2021-03-10 21:59:55,785 INFO L226 Difference]: Without dead ends: 595 [2021-03-10 21:59:55,786 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 503.4ms TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:59:55,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-03-10 21:59:55,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 349. [2021-03-10 21:59:55,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.103448275862069) internal successors, (1080), 348 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:55,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1080 transitions. [2021-03-10 21:59:55,791 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1080 transitions. Word has length 20 [2021-03-10 21:59:55,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:55,791 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 1080 transitions. [2021-03-10 21:59:55,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:55,791 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1080 transitions. [2021-03-10 21:59:55,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:55,791 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:55,791 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:56,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-03-10 21:59:56,006 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:56,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:56,006 INFO L82 PathProgramCache]: Analyzing trace with hash -885641731, now seen corresponding path program 53 times [2021-03-10 21:59:56,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:56,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923417649] [2021-03-10 21:59:56,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:56,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923417649] [2021-03-10 21:59:56,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044011081] [2021-03-10 21:59:56,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:56,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:59:56,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:56,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:56,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:56,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:56,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:56,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095931601] [2021-03-10 21:59:56,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:56,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:56,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:56,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:56,234 INFO L87 Difference]: Start difference. First operand 349 states and 1080 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:56,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:56,635 INFO L93 Difference]: Finished difference Result 572 states and 1676 transitions. [2021-03-10 21:59:56,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:59:56,635 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:56,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:56,636 INFO L225 Difference]: With dead ends: 572 [2021-03-10 21:59:56,636 INFO L226 Difference]: Without dead ends: 572 [2021-03-10 21:59:56,637 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 362.8ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:59:56,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-03-10 21:59:56,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 338. [2021-03-10 21:59:56,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.1097922848664687) internal successors, (1048), 337 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:56,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1048 transitions. [2021-03-10 21:59:56,641 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1048 transitions. Word has length 20 [2021-03-10 21:59:56,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:56,642 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 1048 transitions. [2021-03-10 21:59:56,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:56,642 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1048 transitions. [2021-03-10 21:59:56,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:56,642 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:56,642 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:56,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:56,858 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:56,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:56,858 INFO L82 PathProgramCache]: Analyzing trace with hash -989075421, now seen corresponding path program 54 times [2021-03-10 21:59:56,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:56,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38891077] [2021-03-10 21:59:56,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:56,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38891077] [2021-03-10 21:59:56,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281048023] [2021-03-10 21:59:56,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:56,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:59:56,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:56,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:56,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:57,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:57,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:57,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661282568] [2021-03-10 21:59:57,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:57,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:57,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:57,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:57,114 INFO L87 Difference]: Start difference. First operand 338 states and 1048 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:57,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:57,422 INFO L93 Difference]: Finished difference Result 504 states and 1493 transitions. [2021-03-10 21:59:57,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:57,422 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:57,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:57,423 INFO L225 Difference]: With dead ends: 504 [2021-03-10 21:59:57,423 INFO L226 Difference]: Without dead ends: 492 [2021-03-10 21:59:57,423 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 344.8ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:57,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-03-10 21:59:57,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 340. [2021-03-10 21:59:57,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.106194690265487) internal successors, (1053), 339 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1053 transitions. [2021-03-10 21:59:57,427 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1053 transitions. Word has length 20 [2021-03-10 21:59:57,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:57,427 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 1053 transitions. [2021-03-10 21:59:57,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:57,428 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1053 transitions. [2021-03-10 21:59:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:57,428 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:57,428 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:57,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-03-10 21:59:57,629 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:57,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:57,629 INFO L82 PathProgramCache]: Analyzing trace with hash -237674983, now seen corresponding path program 55 times [2021-03-10 21:59:57,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:57,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132377404] [2021-03-10 21:59:57,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:57,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132377404] [2021-03-10 21:59:57,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119924576] [2021-03-10 21:59:57,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:57,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:57,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:57,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:57,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:57,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10903670] [2021-03-10 21:59:57,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:57,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:57,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:57,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:57,858 INFO L87 Difference]: Start difference. First operand 340 states and 1053 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:58,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:58,233 INFO L93 Difference]: Finished difference Result 529 states and 1545 transitions. [2021-03-10 21:59:58,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:59:58,233 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:58,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:58,234 INFO L225 Difference]: With dead ends: 529 [2021-03-10 21:59:58,234 INFO L226 Difference]: Without dead ends: 523 [2021-03-10 21:59:58,234 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 394.1ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:59:58,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-03-10 21:59:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 350. [2021-03-10 21:59:58,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.0945558739255015) internal successors, (1080), 349 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1080 transitions. [2021-03-10 21:59:58,239 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1080 transitions. Word has length 20 [2021-03-10 21:59:58,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:58,239 INFO L480 AbstractCegarLoop]: Abstraction has 350 states and 1080 transitions. [2021-03-10 21:59:58,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:58,240 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1080 transitions. [2021-03-10 21:59:58,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:58,240 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:58,240 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:58,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:58,448 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:58,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:58,448 INFO L82 PathProgramCache]: Analyzing trace with hash 2141868387, now seen corresponding path program 56 times [2021-03-10 21:59:58,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:58,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494545231] [2021-03-10 21:59:58,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:58,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494545231] [2021-03-10 21:59:58,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283597608] [2021-03-10 21:59:58,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:58,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:59:58,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:58,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:58,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:58,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:58,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:58,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226105649] [2021-03-10 21:59:58,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:58,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:58,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:58,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:58,695 INFO L87 Difference]: Start difference. First operand 350 states and 1080 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:58,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:58,962 INFO L93 Difference]: Finished difference Result 500 states and 1491 transitions. [2021-03-10 21:59:58,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:58,963 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:58,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:58,964 INFO L225 Difference]: With dead ends: 500 [2021-03-10 21:59:58,964 INFO L226 Difference]: Without dead ends: 500 [2021-03-10 21:59:58,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 312.6ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:59:58,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-03-10 21:59:58,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 340. [2021-03-10 21:59:58,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.106194690265487) internal successors, (1053), 339 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:58,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1053 transitions. [2021-03-10 21:59:58,970 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1053 transitions. Word has length 20 [2021-03-10 21:59:58,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:58,970 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 1053 transitions. [2021-03-10 21:59:58,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:58,970 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1053 transitions. [2021-03-10 21:59:58,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:58,971 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:58,971 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:59:59,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable620 [2021-03-10 21:59:59,186 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:59:59,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:59:59,186 INFO L82 PathProgramCache]: Analyzing trace with hash -56954447, now seen corresponding path program 57 times [2021-03-10 21:59:59,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:59:59,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160983276] [2021-03-10 21:59:59,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:59:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:59:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:59,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160983276] [2021-03-10 21:59:59,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151862420] [2021-03-10 21:59:59,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:59:59,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:59:59,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:59:59,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 21:59:59,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:59:59,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:59:59,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:59:59,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 21:59:59,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481159628] [2021-03-10 21:59:59,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:59:59,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:59:59,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:59:59,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:59:59,433 INFO L87 Difference]: Start difference. First operand 340 states and 1053 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:59,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:59:59,856 INFO L93 Difference]: Finished difference Result 696 states and 2030 transitions. [2021-03-10 21:59:59,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:59:59,857 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:59:59,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:59:59,858 INFO L225 Difference]: With dead ends: 696 [2021-03-10 21:59:59,858 INFO L226 Difference]: Without dead ends: 696 [2021-03-10 21:59:59,858 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 428.7ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:59:59,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-03-10 21:59:59,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 350. [2021-03-10 21:59:59,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.1260744985673354) internal successors, (1091), 349 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:59,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1091 transitions. [2021-03-10 21:59:59,864 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1091 transitions. Word has length 20 [2021-03-10 21:59:59,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:59:59,864 INFO L480 AbstractCegarLoop]: Abstraction has 350 states and 1091 transitions. [2021-03-10 21:59:59,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:59:59,864 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1091 transitions. [2021-03-10 21:59:59,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:59:59,864 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:59:59,864 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:00,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-03-10 22:00:00,065 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:00,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:00,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1550862169, now seen corresponding path program 58 times [2021-03-10 22:00:00,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:00,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974641562] [2021-03-10 22:00:00,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:00,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:00,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974641562] [2021-03-10 22:00:00,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640847812] [2021-03-10 22:00:00,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:00,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:00,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:00,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:00,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:00,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:00,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:00:00,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179974387] [2021-03-10 22:00:00,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:00:00,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:00,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:00:00,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:00,308 INFO L87 Difference]: Start difference. First operand 350 states and 1091 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:00,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:00,809 INFO L93 Difference]: Finished difference Result 702 states and 2037 transitions. [2021-03-10 22:00:00,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:00:00,809 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:00,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:00,810 INFO L225 Difference]: With dead ends: 702 [2021-03-10 22:00:00,810 INFO L226 Difference]: Without dead ends: 696 [2021-03-10 22:00:00,810 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 529.6ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:00:00,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-03-10 22:00:00,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 347. [2021-03-10 22:00:00,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.121387283236994) internal successors, (1080), 346 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:00,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1080 transitions. [2021-03-10 22:00:00,816 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1080 transitions. Word has length 20 [2021-03-10 22:00:00,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:00,816 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 1080 transitions. [2021-03-10 22:00:00,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:00,816 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1080 transitions. [2021-03-10 22:00:00,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:00,817 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:00,817 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:01,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-03-10 22:00:01,018 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:01,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:01,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1013006591, now seen corresponding path program 59 times [2021-03-10 22:00:01,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:01,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913559747] [2021-03-10 22:00:01,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:01,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913559747] [2021-03-10 22:00:01,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284688140] [2021-03-10 22:00:01,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:01,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:01,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:01,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:01,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:01,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:01,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:00:01,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286196984] [2021-03-10 22:00:01,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:00:01,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:01,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:00:01,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:01,265 INFO L87 Difference]: Start difference. First operand 347 states and 1080 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:01,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:01,696 INFO L93 Difference]: Finished difference Result 666 states and 1955 transitions. [2021-03-10 22:00:01,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:01,696 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:01,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:01,697 INFO L225 Difference]: With dead ends: 666 [2021-03-10 22:00:01,697 INFO L226 Difference]: Without dead ends: 654 [2021-03-10 22:00:01,697 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 462.7ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:01,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-03-10 22:00:01,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 344. [2021-03-10 22:00:01,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.116618075801749) internal successors, (1069), 343 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:01,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1069 transitions. [2021-03-10 22:00:01,702 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1069 transitions. Word has length 20 [2021-03-10 22:00:01,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:01,702 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 1069 transitions. [2021-03-10 22:00:01,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:01,703 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1069 transitions. [2021-03-10 22:00:01,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:01,703 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:01,703 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:01,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-03-10 22:00:01,904 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:01,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:01,904 INFO L82 PathProgramCache]: Analyzing trace with hash -425261269, now seen corresponding path program 60 times [2021-03-10 22:00:01,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:01,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304846232] [2021-03-10 22:00:01,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:01,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304846232] [2021-03-10 22:00:01,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632191838] [2021-03-10 22:00:01,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:02,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:00:02,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:02,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:02,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:02,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:02,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:02,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897032955] [2021-03-10 22:00:02,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:02,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:02,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:02,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:02,141 INFO L87 Difference]: Start difference. First operand 344 states and 1069 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:02,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:02,513 INFO L93 Difference]: Finished difference Result 698 states and 2015 transitions. [2021-03-10 22:00:02,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:02,513 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:02,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:02,514 INFO L225 Difference]: With dead ends: 698 [2021-03-10 22:00:02,514 INFO L226 Difference]: Without dead ends: 680 [2021-03-10 22:00:02,514 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 407.8ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:02,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-03-10 22:00:02,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 341. [2021-03-10 22:00:02,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.111764705882353) internal successors, (1058), 340 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:02,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1058 transitions. [2021-03-10 22:00:02,520 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1058 transitions. Word has length 20 [2021-03-10 22:00:02,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:02,520 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 1058 transitions. [2021-03-10 22:00:02,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:02,520 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1058 transitions. [2021-03-10 22:00:02,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:02,521 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:02,521 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:02,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2021-03-10 22:00:02,723 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:02,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:02,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2098424725, now seen corresponding path program 61 times [2021-03-10 22:00:02,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:02,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126626100] [2021-03-10 22:00:02,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:02,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126626100] [2021-03-10 22:00:02,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153663063] [2021-03-10 22:00:02,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:02,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:02,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:02,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:02,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:00:02,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144231786] [2021-03-10 22:00:02,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:00:02,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:02,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:00:02,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:02,996 INFO L87 Difference]: Start difference. First operand 341 states and 1058 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:03,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:03,319 INFO L93 Difference]: Finished difference Result 635 states and 1869 transitions. [2021-03-10 22:00:03,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:03,320 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:03,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:03,321 INFO L225 Difference]: With dead ends: 635 [2021-03-10 22:00:03,321 INFO L226 Difference]: Without dead ends: 635 [2021-03-10 22:00:03,321 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 380.9ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:03,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-03-10 22:00:03,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 348. [2021-03-10 22:00:03,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.126801152737752) internal successors, (1085), 347 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:03,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1085 transitions. [2021-03-10 22:00:03,326 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1085 transitions. Word has length 20 [2021-03-10 22:00:03,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:03,326 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 1085 transitions. [2021-03-10 22:00:03,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:03,326 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1085 transitions. [2021-03-10 22:00:03,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:03,327 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:03,327 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:03,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:03,531 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:03,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:03,531 INFO L82 PathProgramCache]: Analyzing trace with hash 702634849, now seen corresponding path program 62 times [2021-03-10 22:00:03,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:03,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80464939] [2021-03-10 22:00:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:03,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80464939] [2021-03-10 22:00:03,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719948791] [2021-03-10 22:00:03,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:03,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:03,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:03,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:03,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:03,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:03,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:00:03,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982976748] [2021-03-10 22:00:03,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:00:03,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:03,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:00:03,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:03,855 INFO L87 Difference]: Start difference. First operand 348 states and 1085 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:04,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:04,396 INFO L93 Difference]: Finished difference Result 641 states and 1876 transitions. [2021-03-10 22:00:04,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:00:04,397 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:04,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:04,398 INFO L225 Difference]: With dead ends: 641 [2021-03-10 22:00:04,398 INFO L226 Difference]: Without dead ends: 635 [2021-03-10 22:00:04,398 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 566.1ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:00:04,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-03-10 22:00:04,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 345. [2021-03-10 22:00:04,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.122093023255814) internal successors, (1074), 344 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:04,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1074 transitions. [2021-03-10 22:00:04,403 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1074 transitions. Word has length 20 [2021-03-10 22:00:04,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:04,403 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 1074 transitions. [2021-03-10 22:00:04,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:04,403 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1074 transitions. [2021-03-10 22:00:04,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:04,404 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:04,404 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:04,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-03-10 22:00:04,619 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:04,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:04,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1240490427, now seen corresponding path program 63 times [2021-03-10 22:00:04,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:04,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533951562] [2021-03-10 22:00:04,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:04,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533951562] [2021-03-10 22:00:04,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402530340] [2021-03-10 22:00:04,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:04,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:00:04,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:04,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:04,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:04,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:04,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:04,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:00:04,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899684985] [2021-03-10 22:00:04,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:00:04,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:04,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:00:04,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:04,865 INFO L87 Difference]: Start difference. First operand 345 states and 1074 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:05,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:05,205 INFO L93 Difference]: Finished difference Result 605 states and 1794 transitions. [2021-03-10 22:00:05,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:05,205 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:05,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:05,206 INFO L225 Difference]: With dead ends: 605 [2021-03-10 22:00:05,206 INFO L226 Difference]: Without dead ends: 593 [2021-03-10 22:00:05,206 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 385.5ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:05,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-03-10 22:00:05,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 342. [2021-03-10 22:00:05,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.1173020527859236) internal successors, (1063), 341 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:05,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1063 transitions. [2021-03-10 22:00:05,211 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1063 transitions. Word has length 20 [2021-03-10 22:00:05,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:05,211 INFO L480 AbstractCegarLoop]: Abstraction has 342 states and 1063 transitions. [2021-03-10 22:00:05,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:05,211 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1063 transitions. [2021-03-10 22:00:05,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:05,212 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:05,212 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:05,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-03-10 22:00:05,428 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:05,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:05,429 INFO L82 PathProgramCache]: Analyzing trace with hash -279847627, now seen corresponding path program 64 times [2021-03-10 22:00:05,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:05,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823728371] [2021-03-10 22:00:05,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:05,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823728371] [2021-03-10 22:00:05,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270687636] [2021-03-10 22:00:05,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:05,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:05,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:05,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:05,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:05,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:05,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:00:05,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805497631] [2021-03-10 22:00:05,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:00:05,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:05,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:00:05,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:05,676 INFO L87 Difference]: Start difference. First operand 342 states and 1063 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:06,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:06,319 INFO L93 Difference]: Finished difference Result 710 states and 2054 transitions. [2021-03-10 22:00:06,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:06,320 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:06,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:06,321 INFO L225 Difference]: With dead ends: 710 [2021-03-10 22:00:06,321 INFO L226 Difference]: Without dead ends: 710 [2021-03-10 22:00:06,321 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 647.4ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:00:06,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-03-10 22:00:06,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 350. [2021-03-10 22:00:06,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.1489971346704873) internal successors, (1099), 349 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:06,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1099 transitions. [2021-03-10 22:00:06,327 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1099 transitions. Word has length 20 [2021-03-10 22:00:06,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:06,327 INFO L480 AbstractCegarLoop]: Abstraction has 350 states and 1099 transitions. [2021-03-10 22:00:06,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:06,327 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1099 transitions. [2021-03-10 22:00:06,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:06,328 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:06,328 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:06,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable696 [2021-03-10 22:00:06,528 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:06,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:06,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1773755349, now seen corresponding path program 65 times [2021-03-10 22:00:06,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:06,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783019280] [2021-03-10 22:00:06,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:06,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783019280] [2021-03-10 22:00:06,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621392202] [2021-03-10 22:00:06,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:06,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:06,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:06,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:06,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:06,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:06,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:00:06,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060534620] [2021-03-10 22:00:06,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:00:06,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:06,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:00:06,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:06,775 INFO L87 Difference]: Start difference. First operand 350 states and 1099 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:07,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:07,395 INFO L93 Difference]: Finished difference Result 716 states and 2055 transitions. [2021-03-10 22:00:07,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:00:07,395 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:07,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:07,396 INFO L225 Difference]: With dead ends: 716 [2021-03-10 22:00:07,396 INFO L226 Difference]: Without dead ends: 710 [2021-03-10 22:00:07,396 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 628.4ms TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:00:07,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-03-10 22:00:07,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 353. [2021-03-10 22:00:07,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.127840909090909) internal successors, (1101), 352 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:07,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1101 transitions. [2021-03-10 22:00:07,401 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1101 transitions. Word has length 20 [2021-03-10 22:00:07,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:07,402 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 1101 transitions. [2021-03-10 22:00:07,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:07,402 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1101 transitions. [2021-03-10 22:00:07,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:07,402 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:07,402 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:07,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:07,603 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:07,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:07,603 INFO L82 PathProgramCache]: Analyzing trace with hash 471552811, now seen corresponding path program 66 times [2021-03-10 22:00:07,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:07,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557274200] [2021-03-10 22:00:07,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:07,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:07,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557274200] [2021-03-10 22:00:07,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896367982] [2021-03-10 22:00:07,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:07,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:00:07,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:07,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:07,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:07,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:07,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:00:07,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188431904] [2021-03-10 22:00:07,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:00:07,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:07,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:00:07,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:07,865 INFO L87 Difference]: Start difference. First operand 353 states and 1101 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:08,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:08,202 INFO L93 Difference]: Finished difference Result 678 states and 1975 transitions. [2021-03-10 22:00:08,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:08,203 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:08,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:08,204 INFO L225 Difference]: With dead ends: 678 [2021-03-10 22:00:08,204 INFO L226 Difference]: Without dead ends: 678 [2021-03-10 22:00:08,204 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 373.2ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:08,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-03-10 22:00:08,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 346. [2021-03-10 22:00:08,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.139130434782609) internal successors, (1083), 345 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:08,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1083 transitions. [2021-03-10 22:00:08,209 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1083 transitions. Word has length 20 [2021-03-10 22:00:08,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:08,209 INFO L480 AbstractCegarLoop]: Abstraction has 346 states and 1083 transitions. [2021-03-10 22:00:08,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:08,209 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1083 transitions. [2021-03-10 22:00:08,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:08,210 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:08,210 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:08,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable719,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:08,411 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:08,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:08,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1763895211, now seen corresponding path program 67 times [2021-03-10 22:00:08,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:08,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406408762] [2021-03-10 22:00:08,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:08,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406408762] [2021-03-10 22:00:08,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564677709] [2021-03-10 22:00:08,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:08,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:08,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:08,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:08,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:00:08,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441254047] [2021-03-10 22:00:08,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:00:08,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:08,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:00:08,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:08,657 INFO L87 Difference]: Start difference. First operand 346 states and 1083 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:08,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:08,993 INFO L93 Difference]: Finished difference Result 641 states and 1893 transitions. [2021-03-10 22:00:08,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:08,993 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:08,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:08,994 INFO L225 Difference]: With dead ends: 641 [2021-03-10 22:00:08,995 INFO L226 Difference]: Without dead ends: 641 [2021-03-10 22:00:08,995 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 353.4ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:08,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-03-10 22:00:08,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 343. [2021-03-10 22:00:08,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.1228070175438596) internal successors, (1068), 342 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:09,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1068 transitions. [2021-03-10 22:00:09,000 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1068 transitions. Word has length 20 [2021-03-10 22:00:09,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:09,000 INFO L480 AbstractCegarLoop]: Abstraction has 343 states and 1068 transitions. [2021-03-10 22:00:09,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:09,000 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1068 transitions. [2021-03-10 22:00:09,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:09,000 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:09,000 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:09,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:09,201 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:09,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:09,201 INFO L82 PathProgramCache]: Analyzing trace with hash 492289339, now seen corresponding path program 68 times [2021-03-10 22:00:09,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:09,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945520141] [2021-03-10 22:00:09,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:09,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945520141] [2021-03-10 22:00:09,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438536177] [2021-03-10 22:00:09,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:09,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:09,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:09,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:09,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:09,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:09,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:09,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:00:09,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709788682] [2021-03-10 22:00:09,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:00:09,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:09,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:00:09,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:09,474 INFO L87 Difference]: Start difference. First operand 343 states and 1068 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:10,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:10,200 INFO L93 Difference]: Finished difference Result 678 states and 1967 transitions. [2021-03-10 22:00:10,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:00:10,200 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:10,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:10,201 INFO L225 Difference]: With dead ends: 678 [2021-03-10 22:00:10,201 INFO L226 Difference]: Without dead ends: 672 [2021-03-10 22:00:10,201 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 756.8ms TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:00:10,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-03-10 22:00:10,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 353. [2021-03-10 22:00:10,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.1107954545454546) internal successors, (1095), 352 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:10,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1095 transitions. [2021-03-10 22:00:10,206 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1095 transitions. Word has length 20 [2021-03-10 22:00:10,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:10,207 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 1095 transitions. [2021-03-10 22:00:10,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:10,207 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1095 transitions. [2021-03-10 22:00:10,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:10,207 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:10,207 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:10,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable734 [2021-03-10 22:00:10,408 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:10,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:10,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1423134587, now seen corresponding path program 69 times [2021-03-10 22:00:10,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:10,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948896248] [2021-03-10 22:00:10,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:10,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948896248] [2021-03-10 22:00:10,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015968365] [2021-03-10 22:00:10,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:10,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:00:10,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:10,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:00:10,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:10,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:10,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,646 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:10,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,649 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:10,650 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,652 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:10,652 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:10,656 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,658 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:10,658 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,661 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:10,661 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:10,665 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:10,668 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,670 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:10,670 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:10,673 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:10,716 INFO L628 ElimStorePlain]: treesize reduction 21, result has 70.0 percent of original size [2021-03-10 22:00:10,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:00:10,717 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:258, output treesize:49 [2021-03-10 22:00:10,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:10,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:10,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:00:10,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30993820] [2021-03-10 22:00:10,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:00:10,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:10,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:00:10,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:00:10,814 INFO L87 Difference]: Start difference. First operand 353 states and 1095 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:11,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:11,403 INFO L93 Difference]: Finished difference Result 655 states and 1928 transitions. [2021-03-10 22:00:11,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:11,415 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:11,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:11,416 INFO L225 Difference]: With dead ends: 655 [2021-03-10 22:00:11,416 INFO L226 Difference]: Without dead ends: 655 [2021-03-10 22:00:11,416 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 593.7ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:00:11,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-03-10 22:00:11,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 342. [2021-03-10 22:00:11,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.1173020527859236) internal successors, (1063), 341 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:11,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1063 transitions. [2021-03-10 22:00:11,421 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1063 transitions. Word has length 20 [2021-03-10 22:00:11,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:11,421 INFO L480 AbstractCegarLoop]: Abstraction has 342 states and 1063 transitions. [2021-03-10 22:00:11,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:11,421 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1063 transitions. [2021-03-10 22:00:11,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:11,422 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:11,422 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:11,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:11,637 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:11,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:11,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1526568277, now seen corresponding path program 70 times [2021-03-10 22:00:11,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:11,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642488150] [2021-03-10 22:00:11,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:11,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:11,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642488150] [2021-03-10 22:00:11,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205283089] [2021-03-10 22:00:11,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:11,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:11,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:11,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:11,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:11,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:11,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:00:11,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800576268] [2021-03-10 22:00:11,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:00:11,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:11,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:00:11,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:11,883 INFO L87 Difference]: Start difference. First operand 342 states and 1063 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:12,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:12,281 INFO L93 Difference]: Finished difference Result 597 states and 1772 transitions. [2021-03-10 22:00:12,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:12,281 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:12,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:12,282 INFO L225 Difference]: With dead ends: 597 [2021-03-10 22:00:12,282 INFO L226 Difference]: Without dead ends: 585 [2021-03-10 22:00:12,282 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 411.9ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:12,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-03-10 22:00:12,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 344. [2021-03-10 22:00:12,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.1137026239067054) internal successors, (1068), 343 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:12,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1068 transitions. [2021-03-10 22:00:12,287 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1068 transitions. Word has length 20 [2021-03-10 22:00:12,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:12,287 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 1068 transitions. [2021-03-10 22:00:12,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:12,287 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1068 transitions. [2021-03-10 22:00:12,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:12,288 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:12,288 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:12,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-03-10 22:00:12,488 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:12,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:12,488 INFO L82 PathProgramCache]: Analyzing trace with hash -775167839, now seen corresponding path program 71 times [2021-03-10 22:00:12,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:12,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495889571] [2021-03-10 22:00:12,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:12,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495889571] [2021-03-10 22:00:12,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461411491] [2021-03-10 22:00:12,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:12,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:12,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:12,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:00:12,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:12,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:12,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:12,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:12,762 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:12,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:12,771 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:12,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:12,774 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:12,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:12,776 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:12,802 INFO L628 ElimStorePlain]: treesize reduction 20, result has 58.3 percent of original size [2021-03-10 22:00:12,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:12,803 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:89, output treesize:28 [2021-03-10 22:00:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:12,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:12,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:00:12,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164398706] [2021-03-10 22:00:12,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:00:12,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:12,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:00:12,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:00:12,864 INFO L87 Difference]: Start difference. First operand 344 states and 1068 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:13,382 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-10 22:00:13,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:13,398 INFO L93 Difference]: Finished difference Result 622 states and 1824 transitions. [2021-03-10 22:00:13,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:13,398 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:13,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:13,399 INFO L225 Difference]: With dead ends: 622 [2021-03-10 22:00:13,399 INFO L226 Difference]: Without dead ends: 616 [2021-03-10 22:00:13,399 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 590.5ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:00:13,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-03-10 22:00:13,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 354. [2021-03-10 22:00:13,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.101983002832861) internal successors, (1095), 353 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:13,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1095 transitions. [2021-03-10 22:00:13,404 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1095 transitions. Word has length 20 [2021-03-10 22:00:13,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:13,404 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 1095 transitions. [2021-03-10 22:00:13,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:13,405 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1095 transitions. [2021-03-10 22:00:13,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:13,405 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:13,405 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:13,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable768,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:13,606 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:13,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:13,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1604375531, now seen corresponding path program 72 times [2021-03-10 22:00:13,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:13,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778570923] [2021-03-10 22:00:13,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:13,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778570923] [2021-03-10 22:00:13,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990675337] [2021-03-10 22:00:13,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:13,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:00:13,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:13,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:13,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:13,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:13,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:00:13,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869440757] [2021-03-10 22:00:13,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:00:13,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:13,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:00:13,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:13,872 INFO L87 Difference]: Start difference. First operand 354 states and 1095 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:14,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:14,292 INFO L93 Difference]: Finished difference Result 593 states and 1770 transitions. [2021-03-10 22:00:14,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:14,294 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:14,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:14,295 INFO L225 Difference]: With dead ends: 593 [2021-03-10 22:00:14,295 INFO L226 Difference]: Without dead ends: 593 [2021-03-10 22:00:14,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 456.9ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:14,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-03-10 22:00:14,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 341. [2021-03-10 22:00:14,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.111764705882353) internal successors, (1058), 340 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1058 transitions. [2021-03-10 22:00:14,299 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1058 transitions. Word has length 20 [2021-03-10 22:00:14,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:14,299 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 1058 transitions. [2021-03-10 22:00:14,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:14,299 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1058 transitions. [2021-03-10 22:00:14,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:14,300 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:14,300 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:14,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable776 [2021-03-10 22:00:14,501 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:14,501 INFO L82 PathProgramCache]: Analyzing trace with hash -304735173, now seen corresponding path program 73 times [2021-03-10 22:00:14,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:14,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531580000] [2021-03-10 22:00:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:14,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531580000] [2021-03-10 22:00:14,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823209955] [2021-03-10 22:00:14,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:14,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:14,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:14,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:14,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:14,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121048641] [2021-03-10 22:00:14,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:14,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:14,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:14,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:14,759 INFO L87 Difference]: Start difference. First operand 341 states and 1058 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:15,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:15,116 INFO L93 Difference]: Finished difference Result 620 states and 1810 transitions. [2021-03-10 22:00:15,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:15,117 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:15,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:15,117 INFO L225 Difference]: With dead ends: 620 [2021-03-10 22:00:15,117 INFO L226 Difference]: Without dead ends: 602 [2021-03-10 22:00:15,118 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 384.6ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:15,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-03-10 22:00:15,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 343. [2021-03-10 22:00:15,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.108187134502924) internal successors, (1063), 342 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:15,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1063 transitions. [2021-03-10 22:00:15,122 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1063 transitions. Word has length 20 [2021-03-10 22:00:15,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:15,122 INFO L480 AbstractCegarLoop]: Abstraction has 343 states and 1063 transitions. [2021-03-10 22:00:15,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:15,123 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1063 transitions. [2021-03-10 22:00:15,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:15,123 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:15,123 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:15,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable788,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:15,324 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:15,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:15,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1707620929, now seen corresponding path program 74 times [2021-03-10 22:00:15,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:15,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470599637] [2021-03-10 22:00:15,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:15,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470599637] [2021-03-10 22:00:15,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404629886] [2021-03-10 22:00:15,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:15,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:15,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:15,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:15,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:15,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:15,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:00:15,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490267580] [2021-03-10 22:00:15,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:00:15,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:15,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:00:15,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:15,568 INFO L87 Difference]: Start difference. First operand 343 states and 1063 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:15,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:15,959 INFO L93 Difference]: Finished difference Result 579 states and 1724 transitions. [2021-03-10 22:00:15,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:15,960 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:15,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:15,961 INFO L225 Difference]: With dead ends: 579 [2021-03-10 22:00:15,961 INFO L226 Difference]: Without dead ends: 567 [2021-03-10 22:00:15,961 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 425.4ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:15,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-03-10 22:00:15,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 345. [2021-03-10 22:00:15,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.104651162790698) internal successors, (1068), 344 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:15,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1068 transitions. [2021-03-10 22:00:15,966 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1068 transitions. Word has length 20 [2021-03-10 22:00:15,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:15,966 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 1068 transitions. [2021-03-10 22:00:15,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:15,966 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1068 transitions. [2021-03-10 22:00:15,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:15,967 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:15,967 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:16,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-03-10 22:00:16,167 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:16,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:16,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1835945929, now seen corresponding path program 75 times [2021-03-10 22:00:16,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:16,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635139295] [2021-03-10 22:00:16,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:16,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:16,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635139295] [2021-03-10 22:00:16,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682958724] [2021-03-10 22:00:16,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:16,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:00:16,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:16,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:16,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:16,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:16,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:00:16,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564553972] [2021-03-10 22:00:16,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:00:16,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:16,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:00:16,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:16,410 INFO L87 Difference]: Start difference. First operand 345 states and 1068 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:17,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:17,003 INFO L93 Difference]: Finished difference Result 602 states and 1769 transitions. [2021-03-10 22:00:17,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:17,004 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:17,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:17,004 INFO L225 Difference]: With dead ends: 602 [2021-03-10 22:00:17,004 INFO L226 Difference]: Without dead ends: 596 [2021-03-10 22:00:17,005 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 626.7ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:00:17,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-03-10 22:00:17,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 355. [2021-03-10 22:00:17,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.093220338983051) internal successors, (1095), 354 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:17,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1095 transitions. [2021-03-10 22:00:17,010 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1095 transitions. Word has length 20 [2021-03-10 22:00:17,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:17,010 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1095 transitions. [2021-03-10 22:00:17,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:17,010 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1095 transitions. [2021-03-10 22:00:17,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:17,011 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:17,011 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:17,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable802 [2021-03-10 22:00:17,223 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:17,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:17,223 INFO L82 PathProgramCache]: Analyzing trace with hash 543597441, now seen corresponding path program 76 times [2021-03-10 22:00:17,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:17,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025787448] [2021-03-10 22:00:17,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:17,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025787448] [2021-03-10 22:00:17,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453535272] [2021-03-10 22:00:17,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:17,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:17,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:17,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:17,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:17,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:17,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:00:17,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816094529] [2021-03-10 22:00:17,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:00:17,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:17,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:00:17,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:17,462 INFO L87 Difference]: Start difference. First operand 355 states and 1095 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:17,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:17,894 INFO L93 Difference]: Finished difference Result 573 states and 1715 transitions. [2021-03-10 22:00:17,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:17,894 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:17,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:17,895 INFO L225 Difference]: With dead ends: 573 [2021-03-10 22:00:17,895 INFO L226 Difference]: Without dead ends: 573 [2021-03-10 22:00:17,895 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 444.6ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:17,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-03-10 22:00:17,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 343. [2021-03-10 22:00:17,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.108187134502924) internal successors, (1063), 342 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:17,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1063 transitions. [2021-03-10 22:00:17,900 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1063 transitions. Word has length 20 [2021-03-10 22:00:17,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:17,900 INFO L480 AbstractCegarLoop]: Abstraction has 343 states and 1063 transitions. [2021-03-10 22:00:17,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:17,900 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1063 transitions. [2021-03-10 22:00:17,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:17,901 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:17,901 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:18,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable812,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:18,101 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:18,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:18,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1576251784, now seen corresponding path program 77 times [2021-03-10 22:00:18,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:18,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61848959] [2021-03-10 22:00:18,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:18,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:18,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61848959] [2021-03-10 22:00:18,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029974640] [2021-03-10 22:00:18,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:18,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:18,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:18,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:00:18,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:18,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:18,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,221 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:18,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:18,224 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,239 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:00:18,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:00:18,239 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:63, output treesize:20 [2021-03-10 22:00:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:18,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:18,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:00:18,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763275778] [2021-03-10 22:00:18,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:00:18,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:18,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:00:18,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:00:18,276 INFO L87 Difference]: Start difference. First operand 343 states and 1063 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:18,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:18,406 INFO L93 Difference]: Finished difference Result 457 states and 1394 transitions. [2021-03-10 22:00:18,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:00:18,406 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:18,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:18,407 INFO L225 Difference]: With dead ends: 457 [2021-03-10 22:00:18,407 INFO L226 Difference]: Without dead ends: 414 [2021-03-10 22:00:18,407 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:18,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-03-10 22:00:18,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 350. [2021-03-10 22:00:18,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.1174785100286533) internal successors, (1088), 349 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:18,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1088 transitions. [2021-03-10 22:00:18,411 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1088 transitions. Word has length 20 [2021-03-10 22:00:18,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:18,411 INFO L480 AbstractCegarLoop]: Abstraction has 350 states and 1088 transitions. [2021-03-10 22:00:18,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:18,411 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1088 transitions. [2021-03-10 22:00:18,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:18,412 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:18,412 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:18,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable823,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:18,612 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:18,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:18,612 INFO L82 PathProgramCache]: Analyzing trace with hash -350392803, now seen corresponding path program 78 times [2021-03-10 22:00:18,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:18,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585676386] [2021-03-10 22:00:18,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:18,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585676386] [2021-03-10 22:00:18,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431396634] [2021-03-10 22:00:18,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:18,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:00:18,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:18,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:18,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:18,771 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:18,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:18,774 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:18,780 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-03-10 22:00:18,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:00:18,780 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-03-10 22:00:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:18,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:18,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:18,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622372981] [2021-03-10 22:00:18,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:18,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:18,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:18,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:18,798 INFO L87 Difference]: Start difference. First operand 350 states and 1088 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:18,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:18,897 INFO L93 Difference]: Finished difference Result 449 states and 1342 transitions. [2021-03-10 22:00:18,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:18,897 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:18,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:18,898 INFO L225 Difference]: With dead ends: 449 [2021-03-10 22:00:18,898 INFO L226 Difference]: Without dead ends: 449 [2021-03-10 22:00:18,898 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:18,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-03-10 22:00:18,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 360. [2021-03-10 22:00:18,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.103064066852368) internal successors, (1114), 359 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:18,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1114 transitions. [2021-03-10 22:00:18,902 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1114 transitions. Word has length 20 [2021-03-10 22:00:18,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:18,902 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 1114 transitions. [2021-03-10 22:00:18,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:18,902 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1114 transitions. [2021-03-10 22:00:18,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:18,903 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:18,903 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:19,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable829,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:19,104 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:19,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:19,104 INFO L82 PathProgramCache]: Analyzing trace with hash 808250727, now seen corresponding path program 79 times [2021-03-10 22:00:19,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:19,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935114583] [2021-03-10 22:00:19,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:19,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935114583] [2021-03-10 22:00:19,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600132669] [2021-03-10 22:00:19,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:19,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:19,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:19,247 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:19,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:19,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:19,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:19,256 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-03-10 22:00:19,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:00:19,256 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-03-10 22:00:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:19,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:19,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:00:19,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643300641] [2021-03-10 22:00:19,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:00:19,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:19,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:00:19,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:00:19,278 INFO L87 Difference]: Start difference. First operand 360 states and 1114 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:19,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:19,441 INFO L93 Difference]: Finished difference Result 501 states and 1463 transitions. [2021-03-10 22:00:19,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:19,441 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:19,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:19,442 INFO L225 Difference]: With dead ends: 501 [2021-03-10 22:00:19,442 INFO L226 Difference]: Without dead ends: 501 [2021-03-10 22:00:19,442 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:00:19,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-03-10 22:00:19,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 363. [2021-03-10 22:00:19,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.1077348066298343) internal successors, (1125), 362 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:19,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1125 transitions. [2021-03-10 22:00:19,447 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1125 transitions. Word has length 20 [2021-03-10 22:00:19,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:19,447 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 1125 transitions. [2021-03-10 22:00:19,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:19,447 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1125 transitions. [2021-03-10 22:00:19,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:19,448 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:19,448 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:19,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable835,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:19,648 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:19,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:19,648 INFO L82 PathProgramCache]: Analyzing trace with hash -685656995, now seen corresponding path program 80 times [2021-03-10 22:00:19,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:19,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123090382] [2021-03-10 22:00:19,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:19,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123090382] [2021-03-10 22:00:19,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452369318] [2021-03-10 22:00:19,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:19,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:19,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:19,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:00:19,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:19,792 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:19,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:19,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:19,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:19,800 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-03-10 22:00:19,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:00:19,801 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-03-10 22:00:19,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:19,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:19,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:00:19,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058742337] [2021-03-10 22:00:19,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:00:19,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:19,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:00:19,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:00:19,832 INFO L87 Difference]: Start difference. First operand 363 states and 1125 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:19,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:19,976 INFO L93 Difference]: Finished difference Result 458 states and 1360 transitions. [2021-03-10 22:00:19,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:19,976 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:19,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:19,977 INFO L225 Difference]: With dead ends: 458 [2021-03-10 22:00:19,977 INFO L226 Difference]: Without dead ends: 452 [2021-03-10 22:00:19,977 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:19,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-03-10 22:00:19,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 355. [2021-03-10 22:00:19,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.110169491525424) internal successors, (1101), 354 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:19,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1101 transitions. [2021-03-10 22:00:19,981 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1101 transitions. Word has length 20 [2021-03-10 22:00:19,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:19,982 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1101 transitions. [2021-03-10 22:00:19,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:19,982 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1101 transitions. [2021-03-10 22:00:19,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:19,982 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:19,982 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:20,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable845,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:20,183 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:20,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:20,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1902342315, now seen corresponding path program 81 times [2021-03-10 22:00:20,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:20,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267537041] [2021-03-10 22:00:20,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:20,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267537041] [2021-03-10 22:00:20,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592827104] [2021-03-10 22:00:20,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:20,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:00:20,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:20,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:20,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:20,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:20,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:20,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258901871] [2021-03-10 22:00:20,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:20,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:20,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:20,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:20,384 INFO L87 Difference]: Start difference. First operand 355 states and 1101 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:20,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:20,574 INFO L93 Difference]: Finished difference Result 427 states and 1276 transitions. [2021-03-10 22:00:20,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:20,575 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:20,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:20,576 INFO L225 Difference]: With dead ends: 427 [2021-03-10 22:00:20,576 INFO L226 Difference]: Without dead ends: 427 [2021-03-10 22:00:20,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:00:20,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-03-10 22:00:20,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 361. [2021-03-10 22:00:20,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 3.1194444444444445) internal successors, (1123), 360 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1123 transitions. [2021-03-10 22:00:20,580 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1123 transitions. Word has length 20 [2021-03-10 22:00:20,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:20,580 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 1123 transitions. [2021-03-10 22:00:20,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:20,580 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1123 transitions. [2021-03-10 22:00:20,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:20,581 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:20,581 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:20,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable853,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:20,781 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:20,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:20,781 INFO L82 PathProgramCache]: Analyzing trace with hash 408434593, now seen corresponding path program 82 times [2021-03-10 22:00:20,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:20,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187853283] [2021-03-10 22:00:20,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:20,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:20,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187853283] [2021-03-10 22:00:20,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020806858] [2021-03-10 22:00:20,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:20,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:20,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:20,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:20,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:20,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:20,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:20,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531970784] [2021-03-10 22:00:20,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:20,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:20,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:20,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:20,963 INFO L87 Difference]: Start difference. First operand 361 states and 1123 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:21,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:21,134 INFO L93 Difference]: Finished difference Result 433 states and 1283 transitions. [2021-03-10 22:00:21,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:00:21,134 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:21,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:21,135 INFO L225 Difference]: With dead ends: 433 [2021-03-10 22:00:21,135 INFO L226 Difference]: Without dead ends: 427 [2021-03-10 22:00:21,135 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:21,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-03-10 22:00:21,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 358. [2021-03-10 22:00:21,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.11484593837535) internal successors, (1112), 357 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:21,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1112 transitions. [2021-03-10 22:00:21,139 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1112 transitions. Word has length 20 [2021-03-10 22:00:21,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:21,139 INFO L480 AbstractCegarLoop]: Abstraction has 358 states and 1112 transitions. [2021-03-10 22:00:21,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:21,139 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1112 transitions. [2021-03-10 22:00:21,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:21,140 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:21,140 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:21,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable864 [2021-03-10 22:00:21,341 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:21,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:21,341 INFO L82 PathProgramCache]: Analyzing trace with hash 946290171, now seen corresponding path program 83 times [2021-03-10 22:00:21,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:21,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100049644] [2021-03-10 22:00:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:21,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100049644] [2021-03-10 22:00:21,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347227156] [2021-03-10 22:00:21,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:21,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:21,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:21,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:21,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:21,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:21,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:21,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410785428] [2021-03-10 22:00:21,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:21,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:21,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:21,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:21,539 INFO L87 Difference]: Start difference. First operand 358 states and 1112 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:21,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:21,764 INFO L93 Difference]: Finished difference Result 391 states and 1188 transitions. [2021-03-10 22:00:21,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:21,764 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:21,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:21,764 INFO L225 Difference]: With dead ends: 391 [2021-03-10 22:00:21,765 INFO L226 Difference]: Without dead ends: 379 [2021-03-10 22:00:21,765 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 210.3ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:00:21,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-03-10 22:00:21,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 350. [2021-03-10 22:00:21,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.1174785100286533) internal successors, (1088), 349 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:21,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1088 transitions. [2021-03-10 22:00:21,769 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1088 transitions. Word has length 20 [2021-03-10 22:00:21,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:21,769 INFO L480 AbstractCegarLoop]: Abstraction has 350 states and 1088 transitions. [2021-03-10 22:00:21,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:21,769 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1088 transitions. [2021-03-10 22:00:21,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:21,769 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:21,769 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:21,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable872 [2021-03-10 22:00:21,970 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:21,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:21,970 INFO L82 PathProgramCache]: Analyzing trace with hash -818452776, now seen corresponding path program 84 times [2021-03-10 22:00:21,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:21,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324384177] [2021-03-10 22:00:21,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:22,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324384177] [2021-03-10 22:00:22,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90266155] [2021-03-10 22:00:22,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:22,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:00:22,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:22,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:22,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:22,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:22,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:22,125 INFO L628 ElimStorePlain]: treesize reduction 8, result has 83.3 percent of original size [2021-03-10 22:00:22,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:22,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:22,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:22,131 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:22,148 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:00:22,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:22,149 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:54, output treesize:20 [2021-03-10 22:00:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:22,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:22,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:00:22,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073485512] [2021-03-10 22:00:22,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:22,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:22,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:22,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:22,206 INFO L87 Difference]: Start difference. First operand 350 states and 1088 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:22,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:22,432 INFO L93 Difference]: Finished difference Result 566 states and 1691 transitions. [2021-03-10 22:00:22,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:22,432 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:22,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:22,433 INFO L225 Difference]: With dead ends: 566 [2021-03-10 22:00:22,433 INFO L226 Difference]: Without dead ends: 514 [2021-03-10 22:00:22,433 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 167.5ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:22,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-03-10 22:00:22,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 355. [2021-03-10 22:00:22,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.1440677966101696) internal successors, (1113), 354 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:22,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1113 transitions. [2021-03-10 22:00:22,438 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1113 transitions. Word has length 20 [2021-03-10 22:00:22,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:22,438 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1113 transitions. [2021-03-10 22:00:22,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:22,438 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1113 transitions. [2021-03-10 22:00:22,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:22,439 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:22,439 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:22,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable882 [2021-03-10 22:00:22,642 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:22,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:22,643 INFO L82 PathProgramCache]: Analyzing trace with hash 190922387, now seen corresponding path program 85 times [2021-03-10 22:00:22,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:22,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133763047] [2021-03-10 22:00:22,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:22,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133763047] [2021-03-10 22:00:22,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10777928] [2021-03-10 22:00:22,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:22,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:22,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:22,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:22,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:22,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:22,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:22,839 INFO L628 ElimStorePlain]: treesize reduction 14, result has 77.0 percent of original size [2021-03-10 22:00:22,839 INFO L518 ElimStorePlain]: Eliminatee v_prenex_24 vanished before elimination [2021-03-10 22:00:22,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:22,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:22,862 INFO L628 ElimStorePlain]: treesize reduction 21, result has 48.8 percent of original size [2021-03-10 22:00:22,862 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:00:22,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:22,863 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:80, output treesize:20 [2021-03-10 22:00:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:22,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:22,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:22,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572744919] [2021-03-10 22:00:22,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:22,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:22,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:22,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:22,905 INFO L87 Difference]: Start difference. First operand 355 states and 1113 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:23,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:23,128 INFO L93 Difference]: Finished difference Result 607 states and 1775 transitions. [2021-03-10 22:00:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:23,129 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:23,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:23,129 INFO L225 Difference]: With dead ends: 607 [2021-03-10 22:00:23,129 INFO L226 Difference]: Without dead ends: 607 [2021-03-10 22:00:23,129 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 187.8ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:23,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-03-10 22:00:23,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 367. [2021-03-10 22:00:23,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.1530054644808745) internal successors, (1154), 366 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:23,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1154 transitions. [2021-03-10 22:00:23,134 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1154 transitions. Word has length 20 [2021-03-10 22:00:23,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:23,134 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 1154 transitions. [2021-03-10 22:00:23,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:23,134 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1154 transitions. [2021-03-10 22:00:23,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:23,135 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:23,135 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:23,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable890,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:23,335 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:23,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:23,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1349565917, now seen corresponding path program 86 times [2021-03-10 22:00:23,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:23,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29027773] [2021-03-10 22:00:23,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:23,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29027773] [2021-03-10 22:00:23,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408153562] [2021-03-10 22:00:23,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:23,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:23,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:23,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:23,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:23,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:23,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:23,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:23,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:23,529 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-03-10 22:00:23,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:23,531 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:23,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:23,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:23,540 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-03-10 22:00:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:23,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:23,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:00:23,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429060072] [2021-03-10 22:00:23,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:00:23,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:23,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:00:23,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:00:23,582 INFO L87 Difference]: Start difference. First operand 367 states and 1154 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:23,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:23,733 INFO L93 Difference]: Finished difference Result 659 states and 1896 transitions. [2021-03-10 22:00:23,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:23,734 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:23,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:23,734 INFO L225 Difference]: With dead ends: 659 [2021-03-10 22:00:23,735 INFO L226 Difference]: Without dead ends: 659 [2021-03-10 22:00:23,735 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:00:23,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-03-10 22:00:23,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 373. [2021-03-10 22:00:23,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 3.1693548387096775) internal successors, (1179), 372 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:23,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1179 transitions. [2021-03-10 22:00:23,740 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1179 transitions. Word has length 20 [2021-03-10 22:00:23,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:23,740 INFO L480 AbstractCegarLoop]: Abstraction has 373 states and 1179 transitions. [2021-03-10 22:00:23,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:23,740 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1179 transitions. [2021-03-10 22:00:23,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:23,741 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:23,741 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:23,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable899,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:23,941 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:23,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:23,942 INFO L82 PathProgramCache]: Analyzing trace with hash -144341805, now seen corresponding path program 87 times [2021-03-10 22:00:23,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:23,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130771165] [2021-03-10 22:00:23,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:23,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:23,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130771165] [2021-03-10 22:00:23,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15235651] [2021-03-10 22:00:23,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:24,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:00:24,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:24,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:24,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:24,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:24,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:24,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,134 INFO L628 ElimStorePlain]: treesize reduction 14, result has 77.0 percent of original size [2021-03-10 22:00:24,134 INFO L518 ElimStorePlain]: Eliminatee v_prenex_28 vanished before elimination [2021-03-10 22:00:24,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:24,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,158 INFO L628 ElimStorePlain]: treesize reduction 21, result has 48.8 percent of original size [2021-03-10 22:00:24,158 INFO L518 ElimStorePlain]: Eliminatee v_prenex_27 vanished before elimination [2021-03-10 22:00:24,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:24,159 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:80, output treesize:20 [2021-03-10 22:00:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:24,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:24,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:00:24,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905395923] [2021-03-10 22:00:24,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:00:24,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:24,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:00:24,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:00:24,200 INFO L87 Difference]: Start difference. First operand 373 states and 1179 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:24,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:24,370 INFO L93 Difference]: Finished difference Result 616 states and 1787 transitions. [2021-03-10 22:00:24,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:24,370 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:24,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:24,371 INFO L225 Difference]: With dead ends: 616 [2021-03-10 22:00:24,371 INFO L226 Difference]: Without dead ends: 610 [2021-03-10 22:00:24,371 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 130.9ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:00:24,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-03-10 22:00:24,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 371. [2021-03-10 22:00:24,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.156756756756757) internal successors, (1168), 370 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:24,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1168 transitions. [2021-03-10 22:00:24,376 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1168 transitions. Word has length 20 [2021-03-10 22:00:24,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:24,376 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 1168 transitions. [2021-03-10 22:00:24,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:24,376 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1168 transitions. [2021-03-10 22:00:24,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:24,376 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:24,376 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:24,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable912,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:24,577 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:24,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:24,577 INFO L82 PathProgramCache]: Analyzing trace with hash 601434872, now seen corresponding path program 88 times [2021-03-10 22:00:24,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:24,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128139407] [2021-03-10 22:00:24,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:24,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128139407] [2021-03-10 22:00:24,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997401646] [2021-03-10 22:00:24,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:24,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:24,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:24,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:24,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:24,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:24,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,701 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:24,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:24,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:24,707 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:24,727 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-03-10 22:00:24,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:24,728 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-03-10 22:00:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:24,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:24,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:00:24,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235176677] [2021-03-10 22:00:24,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:24,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:24,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:24,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:24,782 INFO L87 Difference]: Start difference. First operand 371 states and 1168 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:24,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:24,996 INFO L93 Difference]: Finished difference Result 499 states and 1507 transitions. [2021-03-10 22:00:24,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:24,997 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:24,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:24,997 INFO L225 Difference]: With dead ends: 499 [2021-03-10 22:00:24,997 INFO L226 Difference]: Without dead ends: 437 [2021-03-10 22:00:24,997 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 176.1ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:24,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-03-10 22:00:25,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 365. [2021-03-10 22:00:25,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.129120879120879) internal successors, (1139), 364 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:25,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1139 transitions. [2021-03-10 22:00:25,002 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1139 transitions. Word has length 20 [2021-03-10 22:00:25,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:25,002 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 1139 transitions. [2021-03-10 22:00:25,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:25,002 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1139 transitions. [2021-03-10 22:00:25,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:25,002 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:25,002 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:25,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:25,207 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:25,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:25,207 INFO L82 PathProgramCache]: Analyzing trace with hash 2009499485, now seen corresponding path program 89 times [2021-03-10 22:00:25,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:25,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839299399] [2021-03-10 22:00:25,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:25,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:25,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839299399] [2021-03-10 22:00:25,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562295441] [2021-03-10 22:00:25,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:25,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:00:25,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:25,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:25,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:25,355 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:25,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:25,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:25,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:25,403 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.6 percent of original size [2021-03-10 22:00:25,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:25,407 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:25,433 INFO L628 ElimStorePlain]: treesize reduction 17, result has 66.0 percent of original size [2021-03-10 22:00:25,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:25,436 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:25,453 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:00:25,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:25,453 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-03-10 22:00:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:25,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:25,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:00:25,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080528179] [2021-03-10 22:00:25,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:00:25,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:25,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:00:25,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:25,504 INFO L87 Difference]: Start difference. First operand 365 states and 1139 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:25,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:25,649 INFO L93 Difference]: Finished difference Result 560 states and 1653 transitions. [2021-03-10 22:00:25,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:25,649 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:25,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:25,650 INFO L225 Difference]: With dead ends: 560 [2021-03-10 22:00:25,650 INFO L226 Difference]: Without dead ends: 560 [2021-03-10 22:00:25,650 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:00:25,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-03-10 22:00:25,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 355. [2021-03-10 22:00:25,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.1299435028248586) internal successors, (1108), 354 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:25,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1108 transitions. [2021-03-10 22:00:25,655 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1108 transitions. Word has length 20 [2021-03-10 22:00:25,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:25,655 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1108 transitions. [2021-03-10 22:00:25,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:25,655 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1108 transitions. [2021-03-10 22:00:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:25,656 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:25,656 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:25,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable934 [2021-03-10 22:00:25,867 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:25,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:25,867 INFO L82 PathProgramCache]: Analyzing trace with hash -652416419, now seen corresponding path program 90 times [2021-03-10 22:00:25,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:25,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683437475] [2021-03-10 22:00:25,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:25,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683437475] [2021-03-10 22:00:25,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518766215] [2021-03-10 22:00:25,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:25,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:00:25,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:25,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:25,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:26,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:26,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,049 INFO L628 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2021-03-10 22:00:26,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:26,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:26,054 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,072 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:00:26,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:26,072 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:58, output treesize:20 [2021-03-10 22:00:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:26,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:26,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:26,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481808327] [2021-03-10 22:00:26,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:26,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:26,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:26,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:26,149 INFO L87 Difference]: Start difference. First operand 355 states and 1108 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:26,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:26,383 INFO L93 Difference]: Finished difference Result 556 states and 1637 transitions. [2021-03-10 22:00:26,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:26,383 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:26,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:26,384 INFO L225 Difference]: With dead ends: 556 [2021-03-10 22:00:26,384 INFO L226 Difference]: Without dead ends: 556 [2021-03-10 22:00:26,384 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 237.8ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:26,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-03-10 22:00:26,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 358. [2021-03-10 22:00:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.145658263305322) internal successors, (1123), 357 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1123 transitions. [2021-03-10 22:00:26,389 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1123 transitions. Word has length 20 [2021-03-10 22:00:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:26,389 INFO L480 AbstractCegarLoop]: Abstraction has 358 states and 1123 transitions. [2021-03-10 22:00:26,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:26,389 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1123 transitions. [2021-03-10 22:00:26,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:26,390 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:26,390 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:26,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable944,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:26,590 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:26,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:26,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1685413921, now seen corresponding path program 91 times [2021-03-10 22:00:26,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:26,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194594122] [2021-03-10 22:00:26,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:26,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194594122] [2021-03-10 22:00:26,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308951413] [2021-03-10 22:00:26,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:26,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:26,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:26,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:26,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:26,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:26,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:26,759 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:26,761 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:26,780 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-03-10 22:00:26,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:26,781 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-03-10 22:00:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:26,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:26,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:26,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267886231] [2021-03-10 22:00:26,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:26,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:26,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:26,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:26,846 INFO L87 Difference]: Start difference. First operand 358 states and 1123 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:27,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:27,016 INFO L93 Difference]: Finished difference Result 494 states and 1494 transitions. [2021-03-10 22:00:27,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:27,017 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:27,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:27,017 INFO L225 Difference]: With dead ends: 494 [2021-03-10 22:00:27,017 INFO L226 Difference]: Without dead ends: 494 [2021-03-10 22:00:27,018 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:00:27,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-03-10 22:00:27,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 349. [2021-03-10 22:00:27,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1149425287356323) internal successors, (1084), 348 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:27,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1084 transitions. [2021-03-10 22:00:27,022 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1084 transitions. Word has length 20 [2021-03-10 22:00:27,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:27,022 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 1084 transitions. [2021-03-10 22:00:27,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:27,022 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1084 transitions. [2021-03-10 22:00:27,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:27,023 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:27,023 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:27,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable956 [2021-03-10 22:00:27,223 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:27,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:27,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1320603285, now seen corresponding path program 92 times [2021-03-10 22:00:27,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:27,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403802330] [2021-03-10 22:00:27,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:27,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403802330] [2021-03-10 22:00:27,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046897404] [2021-03-10 22:00:27,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:27,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:27,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:27,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:27,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:27,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:27,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:27,366 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:27,367 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:27,408 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.6 percent of original size [2021-03-10 22:00:27,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:27,411 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:27,437 INFO L628 ElimStorePlain]: treesize reduction 17, result has 66.0 percent of original size [2021-03-10 22:00:27,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:27,440 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:27,457 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:00:27,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:27,458 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-03-10 22:00:27,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:27,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:27,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:27,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13051167] [2021-03-10 22:00:27,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:27,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:27,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:27,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:27,532 INFO L87 Difference]: Start difference. First operand 349 states and 1084 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:27,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:27,754 INFO L93 Difference]: Finished difference Result 604 states and 1778 transitions. [2021-03-10 22:00:27,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:27,755 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:27,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:27,755 INFO L225 Difference]: With dead ends: 604 [2021-03-10 22:00:27,755 INFO L226 Difference]: Without dead ends: 604 [2021-03-10 22:00:27,756 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:00:27,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-03-10 22:00:27,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 357. [2021-03-10 22:00:27,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.146067415730337) internal successors, (1120), 356 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:27,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1120 transitions. [2021-03-10 22:00:27,760 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1120 transitions. Word has length 20 [2021-03-10 22:00:27,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:27,760 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 1120 transitions. [2021-03-10 22:00:27,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:27,761 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1120 transitions. [2021-03-10 22:00:27,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:27,761 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:27,761 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:27,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable968,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:27,962 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:27,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:27,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1480456289, now seen corresponding path program 93 times [2021-03-10 22:00:27,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:27,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947084093] [2021-03-10 22:00:27,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:28,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:28,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947084093] [2021-03-10 22:00:28,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928223222] [2021-03-10 22:00:28,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:28,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:00:28,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:28,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:28,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:28,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:28,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:28,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:28,117 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:28,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:28,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:28,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:28,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:28,140 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:28,159 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-03-10 22:00:28,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:28,160 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-03-10 22:00:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:28,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:28,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:28,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542333914] [2021-03-10 22:00:28,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:28,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:28,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:28,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:28,232 INFO L87 Difference]: Start difference. First operand 357 states and 1120 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:28,443 INFO L93 Difference]: Finished difference Result 590 states and 1727 transitions. [2021-03-10 22:00:28,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:28,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:28,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:28,445 INFO L225 Difference]: With dead ends: 590 [2021-03-10 22:00:28,445 INFO L226 Difference]: Without dead ends: 584 [2021-03-10 22:00:28,445 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 199.3ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:00:28,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-03-10 22:00:28,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 360. [2021-03-10 22:00:28,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.1253481894150417) internal successors, (1122), 359 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1122 transitions. [2021-03-10 22:00:28,450 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1122 transitions. Word has length 20 [2021-03-10 22:00:28,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:28,450 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 1122 transitions. [2021-03-10 22:00:28,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:28,451 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1122 transitions. [2021-03-10 22:00:28,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:28,451 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:28,451 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:28,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable979,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:28,654 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:28,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:28,654 INFO L82 PathProgramCache]: Analyzing trace with hash -569202847, now seen corresponding path program 94 times [2021-03-10 22:00:28,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:28,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809255786] [2021-03-10 22:00:28,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:28,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809255786] [2021-03-10 22:00:28,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212269240] [2021-03-10 22:00:28,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:28,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:28,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:28,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:28,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:28,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:28,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:28,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:28,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:28,890 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.1 percent of original size [2021-03-10 22:00:28,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:28,894 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:28,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:28,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:28,930 INFO L628 ElimStorePlain]: treesize reduction 21, result has 61.8 percent of original size [2021-03-10 22:00:28,930 INFO L518 ElimStorePlain]: Eliminatee v_prenex_38 vanished before elimination [2021-03-10 22:00:28,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:28,934 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:28,952 INFO L628 ElimStorePlain]: treesize reduction 8, result has 71.4 percent of original size [2021-03-10 22:00:28,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:28,953 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:88, output treesize:20 [2021-03-10 22:00:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:29,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:29,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:29,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895981932] [2021-03-10 22:00:29,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:29,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:29,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:29,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:29,031 INFO L87 Difference]: Start difference. First operand 360 states and 1122 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:29,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:29,329 INFO L93 Difference]: Finished difference Result 635 states and 1842 transitions. [2021-03-10 22:00:29,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:29,330 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:29,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:29,331 INFO L225 Difference]: With dead ends: 635 [2021-03-10 22:00:29,331 INFO L226 Difference]: Without dead ends: 635 [2021-03-10 22:00:29,331 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 299.1ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:29,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-03-10 22:00:29,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 353. [2021-03-10 22:00:29,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.1363636363636362) internal successors, (1104), 352 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:29,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1104 transitions. [2021-03-10 22:00:29,341 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1104 transitions. Word has length 20 [2021-03-10 22:00:29,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:29,341 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 1104 transitions. [2021-03-10 22:00:29,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:29,341 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1104 transitions. [2021-03-10 22:00:29,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:29,342 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:29,342 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:29,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable992 [2021-03-10 22:00:29,542 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:29,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:29,543 INFO L82 PathProgramCache]: Analyzing trace with hash 723139553, now seen corresponding path program 95 times [2021-03-10 22:00:29,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:29,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273534172] [2021-03-10 22:00:29,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:29,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273534172] [2021-03-10 22:00:29,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560968798] [2021-03-10 22:00:29,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:29,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:00:29,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:29,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:00:29,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:29,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:29,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:29,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:29,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:29,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:29,703 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:29,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:29,707 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:29,709 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:29,710 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:29,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:29,713 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:29,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:29,716 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:29,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:29,718 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:29,756 INFO L628 ElimStorePlain]: treesize reduction 41, result has 48.8 percent of original size [2021-03-10 22:00:29,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:00:29,756 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:179, output treesize:39 [2021-03-10 22:00:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:29,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:29,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:00:29,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706278199] [2021-03-10 22:00:29,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:00:29,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:29,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:00:29,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:00:29,902 INFO L87 Difference]: Start difference. First operand 353 states and 1104 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:30,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:30,209 INFO L93 Difference]: Finished difference Result 569 states and 1694 transitions. [2021-03-10 22:00:30,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:30,210 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:30,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:30,211 INFO L225 Difference]: With dead ends: 569 [2021-03-10 22:00:30,211 INFO L226 Difference]: Without dead ends: 569 [2021-03-10 22:00:30,211 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 325.6ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:30,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-03-10 22:00:30,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 350. [2021-03-10 22:00:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.1203438395415475) internal successors, (1089), 349 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:30,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1089 transitions. [2021-03-10 22:00:30,216 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1089 transitions. Word has length 20 [2021-03-10 22:00:30,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:30,216 INFO L480 AbstractCegarLoop]: Abstraction has 350 states and 1089 transitions. [2021-03-10 22:00:30,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:30,216 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1089 transitions. [2021-03-10 22:00:30,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:30,217 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:30,217 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:30,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1005 [2021-03-10 22:00:30,417 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:30,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:30,418 INFO L82 PathProgramCache]: Analyzing trace with hash -548466319, now seen corresponding path program 96 times [2021-03-10 22:00:30,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:30,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262533991] [2021-03-10 22:00:30,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:30,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262533991] [2021-03-10 22:00:30,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367275877] [2021-03-10 22:00:30,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:30,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:00:30,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:30,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:00:30,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:30,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:30,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:30,617 INFO L628 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2021-03-10 22:00:30,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:30,620 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:30,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:30,622 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:30,638 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:00:30,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:30,639 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:58, output treesize:20 [2021-03-10 22:00:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:30,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:30,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:30,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040538707] [2021-03-10 22:00:30,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:30,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:30,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:30,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:30,707 INFO L87 Difference]: Start difference. First operand 350 states and 1089 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:31,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:31,012 INFO L93 Difference]: Finished difference Result 541 states and 1596 transitions. [2021-03-10 22:00:31,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:31,013 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:31,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:31,014 INFO L225 Difference]: With dead ends: 541 [2021-03-10 22:00:31,014 INFO L226 Difference]: Without dead ends: 535 [2021-03-10 22:00:31,014 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 300.4ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:31,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-03-10 22:00:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 360. [2021-03-10 22:00:31,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.1086350974930363) internal successors, (1116), 359 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:31,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1116 transitions. [2021-03-10 22:00:31,019 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1116 transitions. Word has length 20 [2021-03-10 22:00:31,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:31,019 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 1116 transitions. [2021-03-10 22:00:31,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:31,019 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1116 transitions. [2021-03-10 22:00:31,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:31,019 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:31,019 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:31,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1016,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:31,220 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:31,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:31,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1831077051, now seen corresponding path program 97 times [2021-03-10 22:00:31,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:31,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113479121] [2021-03-10 22:00:31,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:31,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:31,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113479121] [2021-03-10 22:00:31,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262949220] [2021-03-10 22:00:31,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:31,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:31,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:31,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:31,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:31,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:31,405 INFO L628 ElimStorePlain]: treesize reduction 4, result has 91.8 percent of original size [2021-03-10 22:00:31,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:31,408 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:31,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:31,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:31,430 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-03-10 22:00:31,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:31,430 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-03-10 22:00:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:31,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:31,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:31,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988730840] [2021-03-10 22:00:31,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:31,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:31,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:31,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:31,504 INFO L87 Difference]: Start difference. First operand 360 states and 1116 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:31,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:31,674 INFO L93 Difference]: Finished difference Result 512 states and 1542 transitions. [2021-03-10 22:00:31,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:31,674 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:31,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:31,675 INFO L225 Difference]: With dead ends: 512 [2021-03-10 22:00:31,675 INFO L226 Difference]: Without dead ends: 512 [2021-03-10 22:00:31,675 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:00:31,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-03-10 22:00:31,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 347. [2021-03-10 22:00:31,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.1098265895953756) internal successors, (1076), 346 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:31,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1076 transitions. [2021-03-10 22:00:31,680 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1076 transitions. Word has length 20 [2021-03-10 22:00:31,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:31,680 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 1076 transitions. [2021-03-10 22:00:31,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:31,680 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1076 transitions. [2021-03-10 22:00:31,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:31,681 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:31,681 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:31,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1027 [2021-03-10 22:00:31,897 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:31,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:31,897 INFO L82 PathProgramCache]: Analyzing trace with hash 731475677, now seen corresponding path program 98 times [2021-03-10 22:00:31,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:31,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544677846] [2021-03-10 22:00:31,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:31,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544677846] [2021-03-10 22:00:31,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800522707] [2021-03-10 22:00:31,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:31,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:31,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:31,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:00:31,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:32,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:32,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:32,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:32,114 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,140 INFO L628 ElimStorePlain]: treesize reduction 42, result has 35.4 percent of original size [2021-03-10 22:00:32,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:00:32,141 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:111, output treesize:23 [2021-03-10 22:00:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:32,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:32,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:00:32,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209380437] [2021-03-10 22:00:32,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:00:32,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:32,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:00:32,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:32,197 INFO L87 Difference]: Start difference. First operand 347 states and 1076 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:32,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:32,348 INFO L93 Difference]: Finished difference Result 433 states and 1296 transitions. [2021-03-10 22:00:32,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:32,348 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:32,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:32,349 INFO L225 Difference]: With dead ends: 433 [2021-03-10 22:00:32,349 INFO L226 Difference]: Without dead ends: 433 [2021-03-10 22:00:32,349 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 200.3ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:00:32,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-03-10 22:00:32,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 354. [2021-03-10 22:00:32,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.1246458923512748) internal successors, (1103), 353 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:32,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1103 transitions. [2021-03-10 22:00:32,353 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1103 transitions. Word has length 20 [2021-03-10 22:00:32,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:32,353 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 1103 transitions. [2021-03-10 22:00:32,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:32,353 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1103 transitions. [2021-03-10 22:00:32,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:32,354 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:32,354 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:32,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1038,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:32,568 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:32,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:32,568 INFO L82 PathProgramCache]: Analyzing trace with hash -762432045, now seen corresponding path program 99 times [2021-03-10 22:00:32,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:32,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815712964] [2021-03-10 22:00:32,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:32,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815712964] [2021-03-10 22:00:32,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717837638] [2021-03-10 22:00:32,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:32,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:00:32,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:32,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:00:32,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:32,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:32,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,784 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:32,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,787 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:32,787 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:32,790 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:32,792 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,794 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:32,795 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:32,820 INFO L628 ElimStorePlain]: treesize reduction 38, result has 37.7 percent of original size [2021-03-10 22:00:32,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:00:32,821 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:157, output treesize:23 [2021-03-10 22:00:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:32,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:32,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:32,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610010224] [2021-03-10 22:00:32,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:32,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:32,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:32,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:32,851 INFO L87 Difference]: Start difference. First operand 354 states and 1103 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:33,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:33,065 INFO L93 Difference]: Finished difference Result 439 states and 1303 transitions. [2021-03-10 22:00:33,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:00:33,066 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:33,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:33,067 INFO L225 Difference]: With dead ends: 439 [2021-03-10 22:00:33,067 INFO L226 Difference]: Without dead ends: 433 [2021-03-10 22:00:33,067 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 263.8ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:00:33,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-03-10 22:00:33,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 351. [2021-03-10 22:00:33,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.12) internal successors, (1092), 350 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:33,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1092 transitions. [2021-03-10 22:00:33,071 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1092 transitions. Word has length 20 [2021-03-10 22:00:33,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:33,071 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 1092 transitions. [2021-03-10 22:00:33,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:33,071 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1092 transitions. [2021-03-10 22:00:33,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:33,072 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:33,072 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:33,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1044 [2021-03-10 22:00:33,287 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:33,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:33,287 INFO L82 PathProgramCache]: Analyzing trace with hash -224576467, now seen corresponding path program 100 times [2021-03-10 22:00:33,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:33,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309209867] [2021-03-10 22:00:33,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:33,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309209867] [2021-03-10 22:00:33,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552206564] [2021-03-10 22:00:33,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:33,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:33,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:33,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:33,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:33,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:33,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:33,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051204419] [2021-03-10 22:00:33,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:33,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:33,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:33,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:33,508 INFO L87 Difference]: Start difference. First operand 351 states and 1092 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:33,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:33,749 INFO L93 Difference]: Finished difference Result 403 states and 1221 transitions. [2021-03-10 22:00:33,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:33,749 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:33,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:33,750 INFO L225 Difference]: With dead ends: 403 [2021-03-10 22:00:33,750 INFO L226 Difference]: Without dead ends: 391 [2021-03-10 22:00:33,750 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 293.9ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:00:33,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-03-10 22:00:33,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 348. [2021-03-10 22:00:33,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.115273775216138) internal successors, (1081), 347 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:33,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1081 transitions. [2021-03-10 22:00:33,754 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1081 transitions. Word has length 20 [2021-03-10 22:00:33,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:33,754 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 1081 transitions. [2021-03-10 22:00:33,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:33,754 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1081 transitions. [2021-03-10 22:00:33,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:33,755 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:33,755 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:33,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1053,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:33,963 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:33,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:33,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1744914521, now seen corresponding path program 101 times [2021-03-10 22:00:33,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:33,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713907498] [2021-03-10 22:00:33,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:34,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713907498] [2021-03-10 22:00:34,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982040068] [2021-03-10 22:00:34,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:34,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:34,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:34,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:34,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:34,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:34,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:34,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915748180] [2021-03-10 22:00:34,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:34,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:34,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:34,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:34,207 INFO L87 Difference]: Start difference. First operand 348 states and 1081 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:34,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:34,440 INFO L93 Difference]: Finished difference Result 517 states and 1506 transitions. [2021-03-10 22:00:34,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:34,443 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:34,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:34,444 INFO L225 Difference]: With dead ends: 517 [2021-03-10 22:00:34,444 INFO L226 Difference]: Without dead ends: 517 [2021-03-10 22:00:34,444 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 251.5ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:34,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-03-10 22:00:34,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 356. [2021-03-10 22:00:34,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.1464788732394364) internal successors, (1117), 355 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:34,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1117 transitions. [2021-03-10 22:00:34,448 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1117 transitions. Word has length 20 [2021-03-10 22:00:34,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:34,448 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 1117 transitions. [2021-03-10 22:00:34,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:34,449 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1117 transitions. [2021-03-10 22:00:34,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:34,449 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:34,449 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:34,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:34,655 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:34,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:34,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1056145053, now seen corresponding path program 102 times [2021-03-10 22:00:34,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:34,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31541859] [2021-03-10 22:00:34,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:34,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31541859] [2021-03-10 22:00:34,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566492280] [2021-03-10 22:00:34,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:34,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:00:34,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:34,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:00:34,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:34,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:34,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:34,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:34,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:34,859 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:34,859 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:34,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:34,863 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:34,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:34,866 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:34,868 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:34,869 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:34,954 INFO L628 ElimStorePlain]: treesize reduction 82, result has 54.4 percent of original size [2021-03-10 22:00:34,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:34,958 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:34,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:34,961 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:34,963 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:34,964 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:35,008 INFO L628 ElimStorePlain]: treesize reduction 15, result has 75.0 percent of original size [2021-03-10 22:00:35,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:35,009 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:293, output treesize:45 [2021-03-10 22:00:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:35,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:35,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:00:35,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395316610] [2021-03-10 22:00:35,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:00:35,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:35,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:00:35,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:35,091 INFO L87 Difference]: Start difference. First operand 356 states and 1117 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:35,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:35,676 INFO L93 Difference]: Finished difference Result 552 states and 1573 transitions. [2021-03-10 22:00:35,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:00:35,676 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:35,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:35,677 INFO L225 Difference]: With dead ends: 552 [2021-03-10 22:00:35,677 INFO L226 Difference]: Without dead ends: 546 [2021-03-10 22:00:35,677 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 565.7ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:00:35,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-03-10 22:00:35,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 359. [2021-03-10 22:00:35,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.125698324022346) internal successors, (1119), 358 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:35,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1119 transitions. [2021-03-10 22:00:35,682 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1119 transitions. Word has length 20 [2021-03-10 22:00:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:35,682 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 1119 transitions. [2021-03-10 22:00:35,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1119 transitions. [2021-03-10 22:00:35,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:35,683 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:35,683 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:35,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1072 [2021-03-10 22:00:35,883 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:35,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:35,883 INFO L82 PathProgramCache]: Analyzing trace with hash -993514083, now seen corresponding path program 103 times [2021-03-10 22:00:35,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:35,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109599231] [2021-03-10 22:00:35,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:35,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109599231] [2021-03-10 22:00:35,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441151529] [2021-03-10 22:00:35,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:35,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:35,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:36,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:36,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:36,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090929209] [2021-03-10 22:00:36,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:36,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:36,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:36,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:36,106 INFO L87 Difference]: Start difference. First operand 359 states and 1119 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:36,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:36,338 INFO L93 Difference]: Finished difference Result 514 states and 1493 transitions. [2021-03-10 22:00:36,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:36,339 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:36,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:36,340 INFO L225 Difference]: With dead ends: 514 [2021-03-10 22:00:36,340 INFO L226 Difference]: Without dead ends: 514 [2021-03-10 22:00:36,340 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 247.2ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:36,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-03-10 22:00:36,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 352. [2021-03-10 22:00:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.1367521367521367) internal successors, (1101), 351 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:36,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1101 transitions. [2021-03-10 22:00:36,344 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1101 transitions. Word has length 20 [2021-03-10 22:00:36,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:36,344 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 1101 transitions. [2021-03-10 22:00:36,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:36,345 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1101 transitions. [2021-03-10 22:00:36,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:36,345 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:36,345 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:36,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1086,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:36,546 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:36,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:36,546 INFO L82 PathProgramCache]: Analyzing trace with hash 298828317, now seen corresponding path program 104 times [2021-03-10 22:00:36,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:36,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693304864] [2021-03-10 22:00:36,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:36,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693304864] [2021-03-10 22:00:36,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416344710] [2021-03-10 22:00:36,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:36,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:36,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:36,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:36,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:36,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:36,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:36,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932249275] [2021-03-10 22:00:36,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:36,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:36,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:36,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:36,801 INFO L87 Difference]: Start difference. First operand 352 states and 1101 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:36,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:36,980 INFO L93 Difference]: Finished difference Result 448 states and 1345 transitions. [2021-03-10 22:00:36,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:36,980 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:36,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:36,981 INFO L225 Difference]: With dead ends: 448 [2021-03-10 22:00:36,981 INFO L226 Difference]: Without dead ends: 448 [2021-03-10 22:00:36,981 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 220.8ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:00:36,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-03-10 22:00:36,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 349. [2021-03-10 22:00:36,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1206896551724137) internal successors, (1086), 348 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:36,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1086 transitions. [2021-03-10 22:00:36,985 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1086 transitions. Word has length 20 [2021-03-10 22:00:36,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:36,985 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 1086 transitions. [2021-03-10 22:00:36,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:36,985 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1086 transitions. [2021-03-10 22:00:36,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:36,986 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:36,986 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:37,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1103,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:37,187 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:37,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:37,187 INFO L82 PathProgramCache]: Analyzing trace with hash -972777555, now seen corresponding path program 105 times [2021-03-10 22:00:37,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:37,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943119536] [2021-03-10 22:00:37,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:37,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943119536] [2021-03-10 22:00:37,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147420495] [2021-03-10 22:00:37,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:37,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:00:37,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:37,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:00:37,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:37,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:37,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:37,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:37,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:37,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:37,395 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:37,397 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:37,397 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:37,400 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:37,400 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:37,402 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:37,403 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:37,486 INFO L628 ElimStorePlain]: treesize reduction 82, result has 54.4 percent of original size [2021-03-10 22:00:37,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:37,489 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:37,491 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:37,492 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:37,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:37,495 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:37,538 INFO L628 ElimStorePlain]: treesize reduction 15, result has 75.0 percent of original size [2021-03-10 22:00:37,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:37,539 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:293, output treesize:45 [2021-03-10 22:00:37,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:37,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:37,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:37,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142353727] [2021-03-10 22:00:37,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:37,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:37,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:37,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:37,604 INFO L87 Difference]: Start difference. First operand 349 states and 1086 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:37,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:37,989 INFO L93 Difference]: Finished difference Result 485 states and 1419 transitions. [2021-03-10 22:00:37,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:00:37,989 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:37,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:37,990 INFO L225 Difference]: With dead ends: 485 [2021-03-10 22:00:37,990 INFO L226 Difference]: Without dead ends: 479 [2021-03-10 22:00:37,990 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 400.0ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:37,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-03-10 22:00:37,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 359. [2021-03-10 22:00:37,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.1089385474860336) internal successors, (1113), 358 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:37,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1113 transitions. [2021-03-10 22:00:37,994 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1113 transitions. Word has length 20 [2021-03-10 22:00:37,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:37,994 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 1113 transitions. [2021-03-10 22:00:37,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:37,994 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1113 transitions. [2021-03-10 22:00:37,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:37,995 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:37,995 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:38,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-03-10 22:00:38,195 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:38,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:38,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1406765815, now seen corresponding path program 106 times [2021-03-10 22:00:38,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:38,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353785827] [2021-03-10 22:00:38,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:38,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:38,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353785827] [2021-03-10 22:00:38,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087770129] [2021-03-10 22:00:38,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:38,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:38,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:38,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:38,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:38,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:38,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:38,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147129520] [2021-03-10 22:00:38,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:38,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:38,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:38,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:38,420 INFO L87 Difference]: Start difference. First operand 359 states and 1113 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:38,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:38,731 INFO L93 Difference]: Finished difference Result 462 states and 1380 transitions. [2021-03-10 22:00:38,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:38,731 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:38,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:38,732 INFO L225 Difference]: With dead ends: 462 [2021-03-10 22:00:38,732 INFO L226 Difference]: Without dead ends: 462 [2021-03-10 22:00:38,732 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 296.4ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:38,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-03-10 22:00:38,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 348. [2021-03-10 22:00:38,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.115273775216138) internal successors, (1081), 347 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:38,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1081 transitions. [2021-03-10 22:00:38,736 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1081 transitions. Word has length 20 [2021-03-10 22:00:38,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:38,736 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 1081 transitions. [2021-03-10 22:00:38,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:38,737 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1081 transitions. [2021-03-10 22:00:38,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:38,737 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:38,737 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:38,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1125,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:38,938 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:38,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:38,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1303332125, now seen corresponding path program 107 times [2021-03-10 22:00:38,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:38,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815955884] [2021-03-10 22:00:38,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:38,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:38,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815955884] [2021-03-10 22:00:38,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874662904] [2021-03-10 22:00:38,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:39,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:39,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:39,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:39,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:39,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:39,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:39,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070377188] [2021-03-10 22:00:39,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:39,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:39,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:39,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:39,166 INFO L87 Difference]: Start difference. First operand 348 states and 1081 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:39,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:39,434 INFO L93 Difference]: Finished difference Result 394 states and 1197 transitions. [2021-03-10 22:00:39,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:39,434 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:39,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:39,435 INFO L225 Difference]: With dead ends: 394 [2021-03-10 22:00:39,435 INFO L226 Difference]: Without dead ends: 382 [2021-03-10 22:00:39,435 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 301.1ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:00:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-03-10 22:00:39,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 350. [2021-03-10 22:00:39,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.1117478510028653) internal successors, (1086), 349 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:39,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1086 transitions. [2021-03-10 22:00:39,440 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1086 transitions. Word has length 20 [2021-03-10 22:00:39,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:39,440 INFO L480 AbstractCegarLoop]: Abstraction has 350 states and 1086 transitions. [2021-03-10 22:00:39,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:39,440 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1086 transitions. [2021-03-10 22:00:39,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:39,440 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:39,440 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:39,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1134 [2021-03-10 22:00:39,655 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:39,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:39,655 INFO L82 PathProgramCache]: Analyzing trace with hash 2054732563, now seen corresponding path program 108 times [2021-03-10 22:00:39,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:39,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837810934] [2021-03-10 22:00:39,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:39,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837810934] [2021-03-10 22:00:39,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423366654] [2021-03-10 22:00:39,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:39,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:00:39,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:39,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:00:39,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:39,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:39,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:39,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28391443] [2021-03-10 22:00:39,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:39,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:39,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:39,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:39,882 INFO L87 Difference]: Start difference. First operand 350 states and 1086 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:40,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:40,082 INFO L93 Difference]: Finished difference Result 419 states and 1249 transitions. [2021-03-10 22:00:40,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:00:40,083 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:40,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:40,084 INFO L225 Difference]: With dead ends: 419 [2021-03-10 22:00:40,084 INFO L226 Difference]: Without dead ends: 413 [2021-03-10 22:00:40,084 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 224.2ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:40,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-03-10 22:00:40,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 360. [2021-03-10 22:00:40,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.1002785515320332) internal successors, (1113), 359 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:40,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1113 transitions. [2021-03-10 22:00:40,088 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1113 transitions. Word has length 20 [2021-03-10 22:00:40,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:40,088 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 1113 transitions. [2021-03-10 22:00:40,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:40,088 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1113 transitions. [2021-03-10 22:00:40,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:40,089 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:40,089 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:40,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1144 [2021-03-10 22:00:40,289 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:40,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:40,289 INFO L82 PathProgramCache]: Analyzing trace with hash 139308637, now seen corresponding path program 109 times [2021-03-10 22:00:40,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:40,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529567640] [2021-03-10 22:00:40,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:40,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529567640] [2021-03-10 22:00:40,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074410379] [2021-03-10 22:00:40,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:40,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:40,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:40,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:40,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:40,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:40,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69951622] [2021-03-10 22:00:40,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:40,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:40,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:40,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:40,509 INFO L87 Difference]: Start difference. First operand 360 states and 1113 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:40,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:40,688 INFO L93 Difference]: Finished difference Result 390 states and 1195 transitions. [2021-03-10 22:00:40,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:40,689 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:40,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:40,689 INFO L225 Difference]: With dead ends: 390 [2021-03-10 22:00:40,689 INFO L226 Difference]: Without dead ends: 390 [2021-03-10 22:00:40,689 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 224.8ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:00:40,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-03-10 22:00:40,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 345. [2021-03-10 22:00:40,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.104651162790698) internal successors, (1068), 344 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:40,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1068 transitions. [2021-03-10 22:00:40,693 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1068 transitions. Word has length 20 [2021-03-10 22:00:40,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:40,693 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 1068 transitions. [2021-03-10 22:00:40,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:40,693 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1068 transitions. [2021-03-10 22:00:40,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:40,694 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:40,694 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:40,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1149 [2021-03-10 22:00:40,895 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:40,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:40,895 INFO L82 PathProgramCache]: Analyzing trace with hash -527971942, now seen corresponding path program 110 times [2021-03-10 22:00:40,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:40,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343836418] [2021-03-10 22:00:40,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:40,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343836418] [2021-03-10 22:00:40,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484757574] [2021-03-10 22:00:40,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:40,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:40,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:40,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:40,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:41,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:41,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:41,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:41,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:41,085 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.3 percent of original size [2021-03-10 22:00:41,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:41,088 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:41,110 INFO L628 ElimStorePlain]: treesize reduction 27, result has 42.6 percent of original size [2021-03-10 22:00:41,110 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:00:41,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:41,111 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:85, output treesize:20 [2021-03-10 22:00:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:41,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:41,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:00:41,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258129757] [2021-03-10 22:00:41,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:41,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:41,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:41,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:41,167 INFO L87 Difference]: Start difference. First operand 345 states and 1068 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:41,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:41,436 INFO L93 Difference]: Finished difference Result 508 states and 1496 transitions. [2021-03-10 22:00:41,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:41,437 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:41,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:41,437 INFO L225 Difference]: With dead ends: 508 [2021-03-10 22:00:41,437 INFO L226 Difference]: Without dead ends: 456 [2021-03-10 22:00:41,438 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:41,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-03-10 22:00:41,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 352. [2021-03-10 22:00:41,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.133903133903134) internal successors, (1100), 351 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:41,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1100 transitions. [2021-03-10 22:00:41,442 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1100 transitions. Word has length 20 [2021-03-10 22:00:41,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:41,442 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 1100 transitions. [2021-03-10 22:00:41,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:41,442 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1100 transitions. [2021-03-10 22:00:41,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:41,442 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:41,442 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:41,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1155 [2021-03-10 22:00:41,643 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:41,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:41,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1666539965, now seen corresponding path program 111 times [2021-03-10 22:00:41,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:41,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146026648] [2021-03-10 22:00:41,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:41,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146026648] [2021-03-10 22:00:41,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847549813] [2021-03-10 22:00:41,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:41,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:00:41,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:41,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:41,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:41,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:41,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:41,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:41,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:41,805 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-03-10 22:00:41,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:41,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:41,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:41,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:41,817 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-03-10 22:00:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:41,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:41,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:00:41,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131430674] [2021-03-10 22:00:41,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:00:41,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:41,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:00:41,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:00:41,848 INFO L87 Difference]: Start difference. First operand 352 states and 1100 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:42,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:42,018 INFO L93 Difference]: Finished difference Result 530 states and 1577 transitions. [2021-03-10 22:00:42,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:42,019 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:42,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:42,020 INFO L225 Difference]: With dead ends: 530 [2021-03-10 22:00:42,020 INFO L226 Difference]: Without dead ends: 530 [2021-03-10 22:00:42,020 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:00:42,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-03-10 22:00:42,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 366. [2021-03-10 22:00:42,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.147945205479452) internal successors, (1149), 365 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1149 transitions. [2021-03-10 22:00:42,024 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1149 transitions. Word has length 20 [2021-03-10 22:00:42,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:42,024 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1149 transitions. [2021-03-10 22:00:42,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1149 transitions. [2021-03-10 22:00:42,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:42,025 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:42,025 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:42,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1168 [2021-03-10 22:00:42,226 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:42,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:42,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1469783801, now seen corresponding path program 112 times [2021-03-10 22:00:42,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:42,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382795833] [2021-03-10 22:00:42,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:42,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382795833] [2021-03-10 22:00:42,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071744385] [2021-03-10 22:00:42,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:42,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:42,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:42,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:42,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:42,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:42,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:42,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:42,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:42,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:42,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:42,404 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:42,430 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-03-10 22:00:42,430 INFO L518 ElimStorePlain]: Eliminatee v_prenex_48 vanished before elimination [2021-03-10 22:00:42,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:42,430 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-03-10 22:00:42,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:42,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:42,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:00:42,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204011835] [2021-03-10 22:00:42,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:00:42,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:42,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:00:42,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:00:42,472 INFO L87 Difference]: Start difference. First operand 366 states and 1149 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:42,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:42,617 INFO L93 Difference]: Finished difference Result 582 states and 1698 transitions. [2021-03-10 22:00:42,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:42,617 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:42,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:42,618 INFO L225 Difference]: With dead ends: 582 [2021-03-10 22:00:42,618 INFO L226 Difference]: Without dead ends: 582 [2021-03-10 22:00:42,618 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:42,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-03-10 22:00:42,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 372. [2021-03-10 22:00:42,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 3.164420485175202) internal successors, (1174), 371 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:42,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1174 transitions. [2021-03-10 22:00:42,623 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1174 transitions. Word has length 20 [2021-03-10 22:00:42,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:42,623 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 1174 transitions. [2021-03-10 22:00:42,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:42,623 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1174 transitions. [2021-03-10 22:00:42,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:42,623 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:42,623 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:42,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1177,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:42,831 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:42,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:42,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1331275773, now seen corresponding path program 113 times [2021-03-10 22:00:42,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:42,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616915453] [2021-03-10 22:00:42,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:42,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616915453] [2021-03-10 22:00:42,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30738086] [2021-03-10 22:00:42,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:42,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:00:42,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:42,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:00:42,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:43,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:43,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:43,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,020 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:43,021 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:43,024 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:43,027 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:43,030 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:43,033 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,035 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:43,036 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,073 INFO L628 ElimStorePlain]: treesize reduction 29, result has 57.4 percent of original size [2021-03-10 22:00:43,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:00:43,074 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:175, output treesize:39 [2021-03-10 22:00:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:43,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:43,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:00:43,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869234265] [2021-03-10 22:00:43,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:00:43,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:43,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:00:43,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:00:43,184 INFO L87 Difference]: Start difference. First operand 372 states and 1174 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:43,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:43,459 INFO L93 Difference]: Finished difference Result 539 states and 1589 transitions. [2021-03-10 22:00:43,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:43,459 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:43,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:43,460 INFO L225 Difference]: With dead ends: 539 [2021-03-10 22:00:43,460 INFO L226 Difference]: Without dead ends: 533 [2021-03-10 22:00:43,460 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 263.9ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:43,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-03-10 22:00:43,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 370. [2021-03-10 22:00:43,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.151761517615176) internal successors, (1163), 369 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:43,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1163 transitions. [2021-03-10 22:00:43,465 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1163 transitions. Word has length 20 [2021-03-10 22:00:43,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:43,465 INFO L480 AbstractCegarLoop]: Abstraction has 370 states and 1163 transitions. [2021-03-10 22:00:43,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:43,465 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1163 transitions. [2021-03-10 22:00:43,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:43,465 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:43,465 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:43,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1188 [2021-03-10 22:00:43,666 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:43,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:43,666 INFO L82 PathProgramCache]: Analyzing trace with hash 2077052450, now seen corresponding path program 114 times [2021-03-10 22:00:43,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:43,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439078322] [2021-03-10 22:00:43,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:43,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439078322] [2021-03-10 22:00:43,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215793840] [2021-03-10 22:00:43,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:43,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:00:43,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:43,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:43,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:43,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:43,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,840 INFO L628 ElimStorePlain]: treesize reduction 22, result has 64.5 percent of original size [2021-03-10 22:00:43,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:43,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:43,845 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:43,863 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:00:43,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:43,863 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:68, output treesize:20 [2021-03-10 22:00:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:43,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:43,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:00:43,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463653747] [2021-03-10 22:00:43,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:43,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:43,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:43,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:43,916 INFO L87 Difference]: Start difference. First operand 370 states and 1163 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:44,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:44,261 INFO L93 Difference]: Finished difference Result 539 states and 1587 transitions. [2021-03-10 22:00:44,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:00:44,262 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:44,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:44,262 INFO L225 Difference]: With dead ends: 539 [2021-03-10 22:00:44,262 INFO L226 Difference]: Without dead ends: 477 [2021-03-10 22:00:44,263 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 264.3ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:44,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-03-10 22:00:44,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 367. [2021-03-10 22:00:44,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.1311475409836067) internal successors, (1146), 366 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:44,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1146 transitions. [2021-03-10 22:00:44,267 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1146 transitions. Word has length 20 [2021-03-10 22:00:44,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:44,268 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 1146 transitions. [2021-03-10 22:00:44,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:44,268 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1146 transitions. [2021-03-10 22:00:44,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:44,269 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:44,269 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:44,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1205,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:44,469 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:44,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:44,470 INFO L82 PathProgramCache]: Analyzing trace with hash -809850233, now seen corresponding path program 115 times [2021-03-10 22:00:44,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:44,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501332641] [2021-03-10 22:00:44,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:44,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501332641] [2021-03-10 22:00:44,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745566096] [2021-03-10 22:00:44,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:44,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:44,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:44,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:44,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:44,661 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-03-10 22:00:44,661 INFO L518 ElimStorePlain]: Eliminatee v_prenex_52 vanished before elimination [2021-03-10 22:00:44,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:44,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:44,693 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-03-10 22:00:44,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:44,696 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:44,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:44,699 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:44,716 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:00:44,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:44,717 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-03-10 22:00:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:44,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:44,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:44,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982899026] [2021-03-10 22:00:44,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:44,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:44,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:44,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:44,770 INFO L87 Difference]: Start difference. First operand 367 states and 1146 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:44,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:44,915 INFO L93 Difference]: Finished difference Result 642 states and 1882 transitions. [2021-03-10 22:00:44,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:44,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:44,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:44,917 INFO L225 Difference]: With dead ends: 642 [2021-03-10 22:00:44,917 INFO L226 Difference]: Without dead ends: 642 [2021-03-10 22:00:44,917 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:00:44,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-03-10 22:00:44,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 373. [2021-03-10 22:00:44,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 3.1451612903225805) internal successors, (1170), 372 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:44,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1170 transitions. [2021-03-10 22:00:44,921 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1170 transitions. Word has length 20 [2021-03-10 22:00:44,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:44,922 INFO L480 AbstractCegarLoop]: Abstraction has 373 states and 1170 transitions. [2021-03-10 22:00:44,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:44,922 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1170 transitions. [2021-03-10 22:00:44,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:44,922 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:44,922 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:45,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1217,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:45,137 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:45,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:45,138 INFO L82 PathProgramCache]: Analyzing trace with hash 823201159, now seen corresponding path program 116 times [2021-03-10 22:00:45,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:45,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350812391] [2021-03-10 22:00:45,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:45,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350812391] [2021-03-10 22:00:45,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276422194] [2021-03-10 22:00:45,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:45,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:45,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:45,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:45,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:45,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:45,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:45,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:45,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:45,321 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-03-10 22:00:45,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:45,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:45,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:45,327 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:45,350 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-03-10 22:00:45,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:45,351 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-03-10 22:00:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:45,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:45,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:00:45,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631343219] [2021-03-10 22:00:45,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:00:45,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:45,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:00:45,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:00:45,419 INFO L87 Difference]: Start difference. First operand 373 states and 1170 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:45,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:45,576 INFO L93 Difference]: Finished difference Result 609 states and 1800 transitions. [2021-03-10 22:00:45,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:45,577 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:45,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:45,578 INFO L225 Difference]: With dead ends: 609 [2021-03-10 22:00:45,578 INFO L226 Difference]: Without dead ends: 609 [2021-03-10 22:00:45,578 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:45,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-03-10 22:00:45,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 376. [2021-03-10 22:00:45,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.16) internal successors, (1185), 375 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:45,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1185 transitions. [2021-03-10 22:00:45,583 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1185 transitions. Word has length 20 [2021-03-10 22:00:45,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:45,583 INFO L480 AbstractCegarLoop]: Abstraction has 376 states and 1185 transitions. [2021-03-10 22:00:45,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:45,583 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1185 transitions. [2021-03-10 22:00:45,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:45,584 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:45,584 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:45,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1228 [2021-03-10 22:00:45,784 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:45,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:45,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1133935797, now seen corresponding path program 117 times [2021-03-10 22:00:45,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:45,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617016194] [2021-03-10 22:00:45,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:45,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617016194] [2021-03-10 22:00:45,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857403417] [2021-03-10 22:00:45,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:45,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:00:45,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:45,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:45,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:45,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:45,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:45,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:45,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:45,948 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-03-10 22:00:45,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:45,950 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:45,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:00:45,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:45,959 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-03-10 22:00:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:46,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:46,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:00:46,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873966277] [2021-03-10 22:00:46,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:00:46,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:46,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:00:46,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:00:46,023 INFO L87 Difference]: Start difference. First operand 376 states and 1185 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:46,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:46,168 INFO L93 Difference]: Finished difference Result 576 states and 1723 transitions. [2021-03-10 22:00:46,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:46,169 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:46,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:46,169 INFO L225 Difference]: With dead ends: 576 [2021-03-10 22:00:46,170 INFO L226 Difference]: Without dead ends: 576 [2021-03-10 22:00:46,170 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:46,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-03-10 22:00:46,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 367. [2021-03-10 22:00:46,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.1311475409836067) internal successors, (1146), 366 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:46,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1146 transitions. [2021-03-10 22:00:46,174 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1146 transitions. Word has length 20 [2021-03-10 22:00:46,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:46,175 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 1146 transitions. [2021-03-10 22:00:46,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:46,175 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1146 transitions. [2021-03-10 22:00:46,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:46,175 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:46,175 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:46,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1241,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:46,391 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:46,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:46,391 INFO L82 PathProgramCache]: Analyzing trace with hash 155014293, now seen corresponding path program 118 times [2021-03-10 22:00:46,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:46,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791684003] [2021-03-10 22:00:46,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:46,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791684003] [2021-03-10 22:00:46,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79440762] [2021-03-10 22:00:46,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:46,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:46,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:46,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:46,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:46,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:46,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:46,556 INFO L628 ElimStorePlain]: treesize reduction 11, result has 78.4 percent of original size [2021-03-10 22:00:46,556 INFO L518 ElimStorePlain]: Eliminatee v_prenex_55 vanished before elimination [2021-03-10 22:00:46,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:46,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:46,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:46,561 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:46,579 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:00:46,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:46,579 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-03-10 22:00:46,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:46,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:46,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:00:46,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547086602] [2021-03-10 22:00:46,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:00:46,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:46,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:00:46,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:00:46,650 INFO L87 Difference]: Start difference. First operand 367 states and 1146 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:46,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:46,832 INFO L93 Difference]: Finished difference Result 657 states and 1911 transitions. [2021-03-10 22:00:46,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:46,832 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:46,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:46,834 INFO L225 Difference]: With dead ends: 657 [2021-03-10 22:00:46,834 INFO L226 Difference]: Without dead ends: 657 [2021-03-10 22:00:46,834 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 186.9ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:00:46,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-03-10 22:00:46,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 375. [2021-03-10 22:00:46,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 3.160427807486631) internal successors, (1182), 374 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:46,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1182 transitions. [2021-03-10 22:00:46,839 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1182 transitions. Word has length 20 [2021-03-10 22:00:46,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:46,839 INFO L480 AbstractCegarLoop]: Abstraction has 375 states and 1182 transitions. [2021-03-10 22:00:46,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:46,839 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1182 transitions. [2021-03-10 22:00:46,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:46,839 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:46,840 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:47,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1251,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:47,040 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:47,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:47,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1338893429, now seen corresponding path program 119 times [2021-03-10 22:00:47,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:47,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999904726] [2021-03-10 22:00:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:47,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999904726] [2021-03-10 22:00:47,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445586456] [2021-03-10 22:00:47,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:47,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:00:47,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:47,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:00:47,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:47,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:47,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:47,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:47,193 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:47,195 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:47,196 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:47,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:47,199 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:47,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:47,202 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:47,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:47,205 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:47,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:47,208 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:47,210 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:47,211 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:47,247 INFO L628 ElimStorePlain]: treesize reduction 29, result has 57.4 percent of original size [2021-03-10 22:00:47,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:00:47,248 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:175, output treesize:39 [2021-03-10 22:00:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:47,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:47,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:00:47,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786364822] [2021-03-10 22:00:47,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:00:47,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:47,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:00:47,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:00:47,401 INFO L87 Difference]: Start difference. First operand 375 states and 1182 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:47,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:47,716 INFO L93 Difference]: Finished difference Result 643 states and 1860 transitions. [2021-03-10 22:00:47,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:47,716 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:47,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:47,717 INFO L225 Difference]: With dead ends: 643 [2021-03-10 22:00:47,717 INFO L226 Difference]: Without dead ends: 637 [2021-03-10 22:00:47,717 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 328.9ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:47,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-03-10 22:00:47,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 369. [2021-03-10 22:00:47,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.1440217391304346) internal successors, (1157), 368 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:47,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1157 transitions. [2021-03-10 22:00:47,722 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1157 transitions. Word has length 20 [2021-03-10 22:00:47,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:47,722 INFO L480 AbstractCegarLoop]: Abstraction has 369 states and 1157 transitions. [2021-03-10 22:00:47,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:47,722 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1157 transitions. [2021-03-10 22:00:47,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:47,722 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:47,722 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:47,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1263,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:47,923 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:47,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:47,923 INFO L82 PathProgramCache]: Analyzing trace with hash 906414731, now seen corresponding path program 120 times [2021-03-10 22:00:47,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:47,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711794115] [2021-03-10 22:00:47,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:47,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711794115] [2021-03-10 22:00:47,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570600956] [2021-03-10 22:00:47,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:48,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:00:48,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:48,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:00:48,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:48,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:48,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:48,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:48,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:48,085 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:48,086 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:48,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:48,089 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:48,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:48,092 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:48,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:48,095 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:48,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:48,098 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:48,099 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:48,100 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:48,136 INFO L628 ElimStorePlain]: treesize reduction 29, result has 57.4 percent of original size [2021-03-10 22:00:48,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:00:48,137 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:175, output treesize:39 [2021-03-10 22:00:48,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:48,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:48,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:00:48,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114838221] [2021-03-10 22:00:48,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:00:48,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:48,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:00:48,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:00:48,280 INFO L87 Difference]: Start difference. First operand 369 states and 1157 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:48,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:48,593 INFO L93 Difference]: Finished difference Result 668 states and 1949 transitions. [2021-03-10 22:00:48,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:48,594 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:48,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:48,595 INFO L225 Difference]: With dead ends: 668 [2021-03-10 22:00:48,595 INFO L226 Difference]: Without dead ends: 668 [2021-03-10 22:00:48,595 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 333.3ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:48,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-03-10 22:00:48,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 372. [2021-03-10 22:00:48,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 3.1590296495956873) internal successors, (1172), 371 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:48,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1172 transitions. [2021-03-10 22:00:48,600 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1172 transitions. Word has length 20 [2021-03-10 22:00:48,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:48,600 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 1172 transitions. [2021-03-10 22:00:48,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:48,600 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1172 transitions. [2021-03-10 22:00:48,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:48,601 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:48,601 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:48,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1280,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:48,801 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:48,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:48,801 INFO L82 PathProgramCache]: Analyzing trace with hash -2096210165, now seen corresponding path program 121 times [2021-03-10 22:00:48,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:48,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372551435] [2021-03-10 22:00:48,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:48,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372551435] [2021-03-10 22:00:48,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641241824] [2021-03-10 22:00:48,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:48,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:48,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:48,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:48,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:48,966 INFO L628 ElimStorePlain]: treesize reduction 11, result has 78.4 percent of original size [2021-03-10 22:00:48,966 INFO L518 ElimStorePlain]: Eliminatee v_prenex_57 vanished before elimination [2021-03-10 22:00:48,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:48,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:48,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:48,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:48,988 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:00:48,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:48,989 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-03-10 22:00:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:49,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:49,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:00:49,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525434640] [2021-03-10 22:00:49,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:00:49,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:49,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:00:49,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:00:49,060 INFO L87 Difference]: Start difference. First operand 372 states and 1172 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:49,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:49,221 INFO L93 Difference]: Finished difference Result 637 states and 1882 transitions. [2021-03-10 22:00:49,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:49,221 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:49,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:49,222 INFO L225 Difference]: With dead ends: 637 [2021-03-10 22:00:49,222 INFO L226 Difference]: Without dead ends: 637 [2021-03-10 22:00:49,222 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 176.8ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:00:49,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-03-10 22:00:49,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 369. [2021-03-10 22:00:49,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.1440217391304346) internal successors, (1157), 368 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:49,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1157 transitions. [2021-03-10 22:00:49,227 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1157 transitions. Word has length 20 [2021-03-10 22:00:49,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:49,227 INFO L480 AbstractCegarLoop]: Abstraction has 369 states and 1157 transitions. [2021-03-10 22:00:49,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:49,227 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1157 transitions. [2021-03-10 22:00:49,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:49,228 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:49,228 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:49,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1297 [2021-03-10 22:00:49,428 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:49,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:49,429 INFO L82 PathProgramCache]: Analyzing trace with hash 927151259, now seen corresponding path program 122 times [2021-03-10 22:00:49,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:49,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816739338] [2021-03-10 22:00:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:49,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816739338] [2021-03-10 22:00:49,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829069689] [2021-03-10 22:00:49,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:49,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:49,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:49,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:49,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:49,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:49,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:49,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:49,578 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:49,614 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-03-10 22:00:49,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:49,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:49,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:49,620 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:49,639 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-03-10 22:00:49,639 INFO L518 ElimStorePlain]: Eliminatee v_prenex_59 vanished before elimination [2021-03-10 22:00:49,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:49,640 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:20 [2021-03-10 22:00:49,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:49,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:49,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:49,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488025540] [2021-03-10 22:00:49,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:49,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:49,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:49,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:49,712 INFO L87 Difference]: Start difference. First operand 369 states and 1157 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:49,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:49,892 INFO L93 Difference]: Finished difference Result 591 states and 1729 transitions. [2021-03-10 22:00:49,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:49,892 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:49,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:49,893 INFO L225 Difference]: With dead ends: 591 [2021-03-10 22:00:49,893 INFO L226 Difference]: Without dead ends: 585 [2021-03-10 22:00:49,893 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 175.7ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:00:49,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-03-10 22:00:49,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 373. [2021-03-10 22:00:49,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 3.1478494623655915) internal successors, (1171), 372 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:49,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1171 transitions. [2021-03-10 22:00:49,898 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1171 transitions. Word has length 20 [2021-03-10 22:00:49,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:49,898 INFO L480 AbstractCegarLoop]: Abstraction has 373 states and 1171 transitions. [2021-03-10 22:00:49,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:49,898 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1171 transitions. [2021-03-10 22:00:49,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:49,899 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:49,899 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:50,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1307,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:50,099 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:50,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:50,100 INFO L82 PathProgramCache]: Analyzing trace with hash -988272667, now seen corresponding path program 123 times [2021-03-10 22:00:50,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:50,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142290607] [2021-03-10 22:00:50,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:50,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142290607] [2021-03-10 22:00:50,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396332809] [2021-03-10 22:00:50,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:50,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:00:50,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:50,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:50,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:50,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:50,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:50,299 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-03-10 22:00:50,299 INFO L518 ElimStorePlain]: Eliminatee v_prenex_63 vanished before elimination [2021-03-10 22:00:50,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:00:50,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:50,331 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-03-10 22:00:50,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:50,333 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:50,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:50,336 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:50,352 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:00:50,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:50,353 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-03-10 22:00:50,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:50,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:50,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:50,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879114367] [2021-03-10 22:00:50,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:50,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:50,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:50,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:50,425 INFO L87 Difference]: Start difference. First operand 373 states and 1171 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:50,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:50,631 INFO L93 Difference]: Finished difference Result 597 states and 1750 transitions. [2021-03-10 22:00:50,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:00:50,631 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:50,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:50,632 INFO L225 Difference]: With dead ends: 597 [2021-03-10 22:00:50,632 INFO L226 Difference]: Without dead ends: 597 [2021-03-10 22:00:50,632 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 213.6ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:50,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-03-10 22:00:50,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 368. [2021-03-10 22:00:50,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.1416893732970026) internal successors, (1153), 367 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:50,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1153 transitions. [2021-03-10 22:00:50,636 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1153 transitions. Word has length 20 [2021-03-10 22:00:50,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:50,636 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 1153 transitions. [2021-03-10 22:00:50,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:50,636 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1153 transitions. [2021-03-10 22:00:50,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:50,637 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:50,637 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:50,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1320 [2021-03-10 22:00:50,837 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:50,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:50,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1228429978, now seen corresponding path program 124 times [2021-03-10 22:00:50,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:50,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543386189] [2021-03-10 22:00:50,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:50,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:50,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543386189] [2021-03-10 22:00:50,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253261043] [2021-03-10 22:00:50,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:50,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:50,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:50,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:50,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:50,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:50,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:50,989 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-03-10 22:00:50,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:00:50,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-03-10 22:00:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:51,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:51,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:00:51,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107560835] [2021-03-10 22:00:51,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:51,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:51,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:51,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:51,024 INFO L87 Difference]: Start difference. First operand 368 states and 1153 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:51,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:51,211 INFO L93 Difference]: Finished difference Result 446 states and 1344 transitions. [2021-03-10 22:00:51,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:51,212 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:51,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:51,212 INFO L225 Difference]: With dead ends: 446 [2021-03-10 22:00:51,212 INFO L226 Difference]: Without dead ends: 374 [2021-03-10 22:00:51,212 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 166.9ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:00:51,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-03-10 22:00:51,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 356. [2021-03-10 22:00:51,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.1436619718309857) internal successors, (1116), 355 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:51,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1116 transitions. [2021-03-10 22:00:51,216 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1116 transitions. Word has length 20 [2021-03-10 22:00:51,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:51,216 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 1116 transitions. [2021-03-10 22:00:51,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:51,216 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1116 transitions. [2021-03-10 22:00:51,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:51,217 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:51,217 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:51,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1330 [2021-03-10 22:00:51,419 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:51,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:51,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1870628323, now seen corresponding path program 125 times [2021-03-10 22:00:51,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:51,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968001533] [2021-03-10 22:00:51,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:51,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968001533] [2021-03-10 22:00:51,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696041109] [2021-03-10 22:00:51,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:51,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:00:51,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:51,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:00:51,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:51,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:00:51,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:51,578 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:51,578 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:51,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:00:51,581 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:51,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:51,584 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:51,606 INFO L628 ElimStorePlain]: treesize reduction 6, result has 83.8 percent of original size [2021-03-10 22:00:51,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:51,607 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:31 [2021-03-10 22:00:51,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:51,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:51,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:00:51,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373887410] [2021-03-10 22:00:51,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:00:51,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:51,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:00:51,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:00:51,686 INFO L87 Difference]: Start difference. First operand 356 states and 1116 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:51,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:51,945 INFO L93 Difference]: Finished difference Result 505 states and 1527 transitions. [2021-03-10 22:00:51,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:51,945 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:51,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:51,946 INFO L225 Difference]: With dead ends: 505 [2021-03-10 22:00:51,946 INFO L226 Difference]: Without dead ends: 505 [2021-03-10 22:00:51,946 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 219.4ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:00:51,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-03-10 22:00:51,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 359. [2021-03-10 22:00:51,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.1340782122905027) internal successors, (1122), 358 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:51,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1122 transitions. [2021-03-10 22:00:51,950 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1122 transitions. Word has length 20 [2021-03-10 22:00:51,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:51,950 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 1122 transitions. [2021-03-10 22:00:51,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:51,951 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1122 transitions. [2021-03-10 22:00:51,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:51,951 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:51,951 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:52,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1338 [2021-03-10 22:00:52,155 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:52,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:52,155 INFO L82 PathProgramCache]: Analyzing trace with hash -237576931, now seen corresponding path program 126 times [2021-03-10 22:00:52,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:52,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600770148] [2021-03-10 22:00:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:52,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600770148] [2021-03-10 22:00:52,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315279936] [2021-03-10 22:00:52,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:52,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:00:52,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:52,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:52,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:52,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:52,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:52,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:52,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:52,290 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 22:00:52,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:00:52,290 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 22:00:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:52,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:52,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:00:52,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262922420] [2021-03-10 22:00:52,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:00:52,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:52,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:00:52,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:00:52,340 INFO L87 Difference]: Start difference. First operand 359 states and 1122 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:52,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:52,486 INFO L93 Difference]: Finished difference Result 509 states and 1519 transitions. [2021-03-10 22:00:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:52,486 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:52,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:52,487 INFO L225 Difference]: With dead ends: 509 [2021-03-10 22:00:52,487 INFO L226 Difference]: Without dead ends: 509 [2021-03-10 22:00:52,487 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:52,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-03-10 22:00:52,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 358. [2021-03-10 22:00:52,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.1288515406162465) internal successors, (1117), 357 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:52,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1117 transitions. [2021-03-10 22:00:52,492 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1117 transitions. Word has length 20 [2021-03-10 22:00:52,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:52,492 INFO L480 AbstractCegarLoop]: Abstraction has 358 states and 1117 transitions. [2021-03-10 22:00:52,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:52,492 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1117 transitions. [2021-03-10 22:00:52,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:52,493 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:52,493 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:52,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1348 [2021-03-10 22:00:52,693 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:52,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:52,694 INFO L82 PathProgramCache]: Analyzing trace with hash 2100253409, now seen corresponding path program 127 times [2021-03-10 22:00:52,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:52,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000421569] [2021-03-10 22:00:52,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:52,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:52,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000421569] [2021-03-10 22:00:52,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323004757] [2021-03-10 22:00:52,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:52,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:52,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:52,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:52,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:52,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:52,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:52,827 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 22:00:52,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:00:52,828 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 22:00:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:52,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:52,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:00:52,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223094941] [2021-03-10 22:00:52,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:00:52,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:52,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:00:52,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:00:52,875 INFO L87 Difference]: Start difference. First operand 358 states and 1117 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:53,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:53,021 INFO L93 Difference]: Finished difference Result 466 states and 1422 transitions. [2021-03-10 22:00:53,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:53,022 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:53,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:53,022 INFO L225 Difference]: With dead ends: 466 [2021-03-10 22:00:53,022 INFO L226 Difference]: Without dead ends: 466 [2021-03-10 22:00:53,023 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:53,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-03-10 22:00:53,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 341. [2021-03-10 22:00:53,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.1058823529411765) internal successors, (1056), 340 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:53,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1056 transitions. [2021-03-10 22:00:53,026 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1056 transitions. Word has length 20 [2021-03-10 22:00:53,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:53,027 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 1056 transitions. [2021-03-10 22:00:53,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:53,027 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1056 transitions. [2021-03-10 22:00:53,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:53,027 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:53,027 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:53,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1355 [2021-03-10 22:00:53,239 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:53,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1574380345, now seen corresponding path program 128 times [2021-03-10 22:00:53,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:53,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529561324] [2021-03-10 22:00:53,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:53,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529561324] [2021-03-10 22:00:53,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127609910] [2021-03-10 22:00:53,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:53,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:53,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:53,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:53,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:53,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:53,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:00:53,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808951071] [2021-03-10 22:00:53,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:00:53,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:53,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:00:53,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:00:53,401 INFO L87 Difference]: Start difference. First operand 341 states and 1056 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:53,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:53,523 INFO L93 Difference]: Finished difference Result 419 states and 1264 transitions. [2021-03-10 22:00:53,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:53,524 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:53,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:53,524 INFO L225 Difference]: With dead ends: 419 [2021-03-10 22:00:53,524 INFO L226 Difference]: Without dead ends: 419 [2021-03-10 22:00:53,524 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:53,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-03-10 22:00:53,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 347. [2021-03-10 22:00:53,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.1300578034682083) internal successors, (1083), 346 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:53,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1083 transitions. [2021-03-10 22:00:53,528 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1083 transitions. Word has length 20 [2021-03-10 22:00:53,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:53,528 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 1083 transitions. [2021-03-10 22:00:53,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:53,528 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1083 transitions. [2021-03-10 22:00:53,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:53,529 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:53,529 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:53,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1362,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:53,729 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:53,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:53,730 INFO L82 PathProgramCache]: Analyzing trace with hash 763449995, now seen corresponding path program 129 times [2021-03-10 22:00:53,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:53,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067180022] [2021-03-10 22:00:53,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:53,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067180022] [2021-03-10 22:00:53,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337424553] [2021-03-10 22:00:53,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:53,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:00:53,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:53,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:53,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:53,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:53,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:00:53,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973852751] [2021-03-10 22:00:53,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:00:53,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:53,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:00:53,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:00:53,881 INFO L87 Difference]: Start difference. First operand 347 states and 1083 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:53,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:53,994 INFO L93 Difference]: Finished difference Result 425 states and 1279 transitions. [2021-03-10 22:00:53,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:53,994 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:53,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:53,995 INFO L225 Difference]: With dead ends: 425 [2021-03-10 22:00:53,995 INFO L226 Difference]: Without dead ends: 425 [2021-03-10 22:00:53,995 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:53,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-03-10 22:00:53,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 344. [2021-03-10 22:00:53,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.1137026239067054) internal successors, (1068), 343 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:53,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1068 transitions. [2021-03-10 22:00:53,999 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1068 transitions. Word has length 20 [2021-03-10 22:00:53,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:53,999 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 1068 transitions. [2021-03-10 22:00:53,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:53,999 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1068 transitions. [2021-03-10 22:00:53,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:53,999 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:53,999 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:54,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1368 [2021-03-10 22:00:54,200 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:54,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:54,200 INFO L82 PathProgramCache]: Analyzing trace with hash 766075771, now seen corresponding path program 130 times [2021-03-10 22:00:54,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:54,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759178522] [2021-03-10 22:00:54,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:54,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:54,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759178522] [2021-03-10 22:00:54,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753682446] [2021-03-10 22:00:54,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:54,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:54,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:54,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:54,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:54,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:54,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:54,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:00:54,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970548564] [2021-03-10 22:00:54,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:00:54,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:54,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:00:54,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:00:54,350 INFO L87 Difference]: Start difference. First operand 344 states and 1068 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:54,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:54,485 INFO L93 Difference]: Finished difference Result 383 states and 1172 transitions. [2021-03-10 22:00:54,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:54,485 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:54,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:54,486 INFO L225 Difference]: With dead ends: 383 [2021-03-10 22:00:54,486 INFO L226 Difference]: Without dead ends: 383 [2021-03-10 22:00:54,486 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:54,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-03-10 22:00:54,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 346. [2021-03-10 22:00:54,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 3.1159420289855073) internal successors, (1075), 345 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1075 transitions. [2021-03-10 22:00:54,490 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1075 transitions. Word has length 20 [2021-03-10 22:00:54,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:54,490 INFO L480 AbstractCegarLoop]: Abstraction has 346 states and 1075 transitions. [2021-03-10 22:00:54,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:54,490 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1075 transitions. [2021-03-10 22:00:54,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:54,490 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:54,490 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:54,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1374 [2021-03-10 22:00:54,691 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:54,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:54,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1330075033, now seen corresponding path program 131 times [2021-03-10 22:00:54,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:54,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087246205] [2021-03-10 22:00:54,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:54,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087246205] [2021-03-10 22:00:54,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6176993] [2021-03-10 22:00:54,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:54,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:00:54,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:54,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:00:54,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:54,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:54,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:54,856 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:54,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:54,859 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:54,860 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:54,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:54,863 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:54,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:54,866 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:54,868 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:54,869 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:54,871 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:54,871 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:54,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:54,874 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:54,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:54,877 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:54,879 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:54,880 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:54,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:54,883 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:54,926 INFO L628 ElimStorePlain]: treesize reduction 21, result has 70.0 percent of original size [2021-03-10 22:00:54,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:00:54,927 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:258, output treesize:49 [2021-03-10 22:00:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:55,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:55,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:00:55,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30696817] [2021-03-10 22:00:55,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:00:55,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:55,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:00:55,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:00:55,025 INFO L87 Difference]: Start difference. First operand 346 states and 1075 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:55,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:55,287 INFO L93 Difference]: Finished difference Result 505 states and 1499 transitions. [2021-03-10 22:00:55,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:55,287 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:55,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:55,288 INFO L225 Difference]: With dead ends: 505 [2021-03-10 22:00:55,288 INFO L226 Difference]: Without dead ends: 505 [2021-03-10 22:00:55,288 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 264.4ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:55,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-03-10 22:00:55,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 356. [2021-03-10 22:00:55,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.1549295774647885) internal successors, (1120), 355 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:55,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1120 transitions. [2021-03-10 22:00:55,292 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1120 transitions. Word has length 20 [2021-03-10 22:00:55,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:55,293 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 1120 transitions. [2021-03-10 22:00:55,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:55,293 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1120 transitions. [2021-03-10 22:00:55,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:55,293 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:55,293 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:55,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1378 [2021-03-10 22:00:55,507 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:55,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:55,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1470984541, now seen corresponding path program 132 times [2021-03-10 22:00:55,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:55,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417580479] [2021-03-10 22:00:55,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:55,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417580479] [2021-03-10 22:00:55,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041692018] [2021-03-10 22:00:55,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:55,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:00:55,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:55,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:55,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:55,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:55,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:00:55,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341106655] [2021-03-10 22:00:55,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:00:55,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:55,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:00:55,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:00:55,711 INFO L87 Difference]: Start difference. First operand 356 states and 1120 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:55,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:55,858 INFO L93 Difference]: Finished difference Result 491 states and 1448 transitions. [2021-03-10 22:00:55,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:55,859 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:55,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:55,859 INFO L225 Difference]: With dead ends: 491 [2021-03-10 22:00:55,859 INFO L226 Difference]: Without dead ends: 485 [2021-03-10 22:00:55,859 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 171.6ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:00:55,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-03-10 22:00:55,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 359. [2021-03-10 22:00:55,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.1340782122905027) internal successors, (1122), 358 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:55,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1122 transitions. [2021-03-10 22:00:55,863 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1122 transitions. Word has length 20 [2021-03-10 22:00:55,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:55,863 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 1122 transitions. [2021-03-10 22:00:55,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:55,863 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1122 transitions. [2021-03-10 22:00:55,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:55,864 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:55,864 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:56,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1389,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:56,064 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:56,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:56,065 INFO L82 PathProgramCache]: Analyzing trace with hash -578674595, now seen corresponding path program 133 times [2021-03-10 22:00:56,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:56,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618456858] [2021-03-10 22:00:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:56,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618456858] [2021-03-10 22:00:56,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852371391] [2021-03-10 22:00:56,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:56,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:56,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:56,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:56,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:00:56,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759973582] [2021-03-10 22:00:56,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:00:56,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:56,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:00:56,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:00:56,270 INFO L87 Difference]: Start difference. First operand 359 states and 1122 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:56,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:56,412 INFO L93 Difference]: Finished difference Result 562 states and 1646 transitions. [2021-03-10 22:00:56,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:56,413 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:56,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:56,413 INFO L225 Difference]: With dead ends: 562 [2021-03-10 22:00:56,413 INFO L226 Difference]: Without dead ends: 562 [2021-03-10 22:00:56,414 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 155.8ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:56,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-03-10 22:00:56,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 362. [2021-03-10 22:00:56,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 3.149584487534626) internal successors, (1137), 361 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:56,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1137 transitions. [2021-03-10 22:00:56,422 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1137 transitions. Word has length 20 [2021-03-10 22:00:56,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:56,422 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 1137 transitions. [2021-03-10 22:00:56,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:56,422 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1137 transitions. [2021-03-10 22:00:56,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:56,423 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:56,423 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:56,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1397 [2021-03-10 22:00:56,623 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:56,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:56,623 INFO L82 PathProgramCache]: Analyzing trace with hash 713667805, now seen corresponding path program 134 times [2021-03-10 22:00:56,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:56,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802357001] [2021-03-10 22:00:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:56,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802357001] [2021-03-10 22:00:56,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612815709] [2021-03-10 22:00:56,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:56,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:00:56,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:56,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:56,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:56,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:56,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:00:56,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174361079] [2021-03-10 22:00:56,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:00:56,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:56,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:00:56,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:00:56,836 INFO L87 Difference]: Start difference. First operand 362 states and 1137 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:56,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:56,977 INFO L93 Difference]: Finished difference Result 531 states and 1579 transitions. [2021-03-10 22:00:56,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:56,978 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:56,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:56,978 INFO L225 Difference]: With dead ends: 531 [2021-03-10 22:00:56,978 INFO L226 Difference]: Without dead ends: 531 [2021-03-10 22:00:56,978 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 155.6ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:00:56,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-03-10 22:00:56,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 359. [2021-03-10 22:00:56,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.1340782122905027) internal successors, (1122), 358 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:56,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1122 transitions. [2021-03-10 22:00:56,983 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1122 transitions. Word has length 20 [2021-03-10 22:00:56,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:56,983 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 1122 transitions. [2021-03-10 22:00:56,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:56,983 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1122 transitions. [2021-03-10 22:00:56,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:56,983 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:56,983 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:57,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1404,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:57,184 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:57,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:57,184 INFO L82 PathProgramCache]: Analyzing trace with hash -557938067, now seen corresponding path program 135 times [2021-03-10 22:00:57,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:57,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948019353] [2021-03-10 22:00:57,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:57,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948019353] [2021-03-10 22:00:57,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201996685] [2021-03-10 22:00:57,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:57,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:00:57,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:57,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:57,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:57,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:57,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:57,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059649871] [2021-03-10 22:00:57,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:57,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:57,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:57,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:57,397 INFO L87 Difference]: Start difference. First operand 359 states and 1122 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:57,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:57,580 INFO L93 Difference]: Finished difference Result 528 states and 1527 transitions. [2021-03-10 22:00:57,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:57,581 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:57,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:57,581 INFO L225 Difference]: With dead ends: 528 [2021-03-10 22:00:57,581 INFO L226 Difference]: Without dead ends: 522 [2021-03-10 22:00:57,582 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 194.4ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:00:57,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-03-10 22:00:57,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 363. [2021-03-10 22:00:57,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.138121546961326) internal successors, (1136), 362 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:57,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1136 transitions. [2021-03-10 22:00:57,586 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1136 transitions. Word has length 20 [2021-03-10 22:00:57,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:57,586 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 1136 transitions. [2021-03-10 22:00:57,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:57,586 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1136 transitions. [2021-03-10 22:00:57,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:57,587 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:57,587 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:57,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1411 [2021-03-10 22:00:57,795 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:57,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:57,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1821605303, now seen corresponding path program 136 times [2021-03-10 22:00:57,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:57,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571078982] [2021-03-10 22:00:57,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:57,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571078982] [2021-03-10 22:00:57,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741165131] [2021-03-10 22:00:57,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:57,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:00:57,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:57,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:57,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:58,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:58,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:58,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:00:58,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718564799] [2021-03-10 22:00:58,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:00:58,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:58,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:00:58,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:00:58,011 INFO L87 Difference]: Start difference. First operand 363 states and 1136 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:58,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:58,245 INFO L93 Difference]: Finished difference Result 534 states and 1548 transitions. [2021-03-10 22:00:58,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:00:58,245 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:58,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:58,246 INFO L225 Difference]: With dead ends: 534 [2021-03-10 22:00:58,246 INFO L226 Difference]: Without dead ends: 534 [2021-03-10 22:00:58,246 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 238.0ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:00:58,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-03-10 22:00:58,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 360. [2021-03-10 22:00:58,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.136490250696379) internal successors, (1126), 359 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:58,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1126 transitions. [2021-03-10 22:00:58,250 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1126 transitions. Word has length 20 [2021-03-10 22:00:58,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:58,250 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 1126 transitions. [2021-03-10 22:00:58,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:58,250 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1126 transitions. [2021-03-10 22:00:58,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:58,251 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:58,251 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:58,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1418,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:58,451 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:58,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:58,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1603864071, now seen corresponding path program 137 times [2021-03-10 22:00:58,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:58,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274967870] [2021-03-10 22:00:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:58,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:58,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274967870] [2021-03-10 22:00:58,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865863326] [2021-03-10 22:00:58,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:58,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:00:58,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:58,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:00:58,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:58,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:00:58,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:58,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:00:58,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:58,630 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:58,630 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:58,632 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:00:58,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:58,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:00:58,635 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:00:58,664 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.0 percent of original size [2021-03-10 22:00:58,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:00:58,665 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:113, output treesize:38 [2021-03-10 22:00:58,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:58,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:58,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:00:58,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648837038] [2021-03-10 22:00:58,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:00:58,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:58,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:00:58,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:00:58,729 INFO L87 Difference]: Start difference. First operand 360 states and 1126 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:58,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:58,952 INFO L93 Difference]: Finished difference Result 467 states and 1405 transitions. [2021-03-10 22:00:58,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:58,953 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:58,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:58,953 INFO L225 Difference]: With dead ends: 467 [2021-03-10 22:00:58,953 INFO L226 Difference]: Without dead ends: 467 [2021-03-10 22:00:58,954 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 222.9ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:00:58,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-03-10 22:00:58,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 361. [2021-03-10 22:00:58,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 3.1333333333333333) internal successors, (1128), 360 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:58,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1128 transitions. [2021-03-10 22:00:58,958 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1128 transitions. Word has length 20 [2021-03-10 22:00:58,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:58,958 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 1128 transitions. [2021-03-10 22:00:58,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:58,958 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1128 transitions. [2021-03-10 22:00:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:58,958 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:58,958 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:59,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1426 [2021-03-10 22:00:59,159 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:59,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:59,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1398760825, now seen corresponding path program 138 times [2021-03-10 22:00:59,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:59,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948553462] [2021-03-10 22:00:59,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:59,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948553462] [2021-03-10 22:00:59,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583030261] [2021-03-10 22:00:59,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:59,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:00:59,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:00:59,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:59,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:59,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:59,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:00:59,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356878316] [2021-03-10 22:00:59,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:00:59,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:59,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:00:59,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:00:59,368 INFO L87 Difference]: Start difference. First operand 361 states and 1128 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:59,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:00:59,570 INFO L93 Difference]: Finished difference Result 461 states and 1387 transitions. [2021-03-10 22:00:59,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:00:59,570 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:00:59,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:00:59,571 INFO L225 Difference]: With dead ends: 461 [2021-03-10 22:00:59,571 INFO L226 Difference]: Without dead ends: 461 [2021-03-10 22:00:59,571 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 204.9ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:00:59,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-03-10 22:00:59,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 350. [2021-03-10 22:00:59,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.1260744985673354) internal successors, (1091), 349 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:59,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1091 transitions. [2021-03-10 22:00:59,575 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1091 transitions. Word has length 20 [2021-03-10 22:00:59,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:00:59,575 INFO L480 AbstractCegarLoop]: Abstraction has 350 states and 1091 transitions. [2021-03-10 22:00:59,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:00:59,575 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1091 transitions. [2021-03-10 22:00:59,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:00:59,575 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:00:59,575 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:00:59,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1440 [2021-03-10 22:00:59,776 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:00:59,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:00:59,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1000341435, now seen corresponding path program 139 times [2021-03-10 22:00:59,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:00:59,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992770490] [2021-03-10 22:00:59,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:00:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:59,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992770490] [2021-03-10 22:00:59,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719817568] [2021-03-10 22:00:59,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:00:59,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:00:59,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:00:59,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:00:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:00:59,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:00:59,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:00:59,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770707677] [2021-03-10 22:00:59,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:00:59,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:00:59,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:00:59,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:00:59,995 INFO L87 Difference]: Start difference. First operand 350 states and 1091 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:00,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:00,193 INFO L93 Difference]: Finished difference Result 422 states and 1280 transitions. [2021-03-10 22:01:00,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:00,193 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:00,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:00,194 INFO L225 Difference]: With dead ends: 422 [2021-03-10 22:01:00,194 INFO L226 Difference]: Without dead ends: 422 [2021-03-10 22:01:00,194 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 232.2ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:01:00,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-03-10 22:01:00,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 347. [2021-03-10 22:01:00,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.1184971098265897) internal successors, (1079), 346 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:00,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1079 transitions. [2021-03-10 22:01:00,198 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1079 transitions. Word has length 20 [2021-03-10 22:01:00,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:00,198 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 1079 transitions. [2021-03-10 22:01:00,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:00,198 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1079 transitions. [2021-03-10 22:01:00,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:00,198 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:00,198 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:00,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1447 [2021-03-10 22:01:00,403 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:00,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:00,403 INFO L82 PathProgramCache]: Analyzing trace with hash 357143421, now seen corresponding path program 140 times [2021-03-10 22:01:00,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:00,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556689642] [2021-03-10 22:01:00,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:00,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556689642] [2021-03-10 22:01:00,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222711892] [2021-03-10 22:01:00,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:00,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:00,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:00,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:00,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:00,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:00,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:01:00,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917450927] [2021-03-10 22:01:00,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:01:00,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:00,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:01:00,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:01:00,639 INFO L87 Difference]: Start difference. First operand 347 states and 1079 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:00,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:00,814 INFO L93 Difference]: Finished difference Result 429 states and 1270 transitions. [2021-03-10 22:01:00,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:00,814 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:00,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:00,815 INFO L225 Difference]: With dead ends: 429 [2021-03-10 22:01:00,815 INFO L226 Difference]: Without dead ends: 423 [2021-03-10 22:01:00,815 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 197.9ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:00,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-03-10 22:01:00,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 361. [2021-03-10 22:01:00,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 3.1055555555555556) internal successors, (1118), 360 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:00,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1118 transitions. [2021-03-10 22:01:00,819 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1118 transitions. Word has length 20 [2021-03-10 22:01:00,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:00,819 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 1118 transitions. [2021-03-10 22:01:00,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:00,819 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1118 transitions. [2021-03-10 22:01:00,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:00,820 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:00,820 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:01,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1451 [2021-03-10 22:01:01,021 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:01,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:01,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1558280505, now seen corresponding path program 141 times [2021-03-10 22:01:01,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:01,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209042945] [2021-03-10 22:01:01,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:01,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:01,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209042945] [2021-03-10 22:01:01,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214369778] [2021-03-10 22:01:01,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:01,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:01:01,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:01,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:01,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:01,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:01,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:01:01,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588293276] [2021-03-10 22:01:01,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:01:01,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:01,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:01:01,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:01:01,237 INFO L87 Difference]: Start difference. First operand 361 states and 1118 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:01,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:01,376 INFO L93 Difference]: Finished difference Result 435 states and 1291 transitions. [2021-03-10 22:01:01,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:01,376 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:01,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:01,377 INFO L225 Difference]: With dead ends: 435 [2021-03-10 22:01:01,377 INFO L226 Difference]: Without dead ends: 435 [2021-03-10 22:01:01,377 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:01,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-03-10 22:01:01,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 359. [2021-03-10 22:01:01,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.1089385474860336) internal successors, (1113), 358 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:01,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1113 transitions. [2021-03-10 22:01:01,381 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1113 transitions. Word has length 20 [2021-03-10 22:01:01,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:01,382 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 1113 transitions. [2021-03-10 22:01:01,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:01,382 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1113 transitions. [2021-03-10 22:01:01,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:01,382 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:01,382 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:01,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1458,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:01,583 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:01,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:01,583 INFO L82 PathProgramCache]: Analyzing trace with hash -518044707, now seen corresponding path program 142 times [2021-03-10 22:01:01,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:01,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583651654] [2021-03-10 22:01:01,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:01,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583651654] [2021-03-10 22:01:01,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210360241] [2021-03-10 22:01:01,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:01,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:01,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:01,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:01,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:01,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:01,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 22:01:01,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114103890] [2021-03-10 22:01:01,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:01:01,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:01,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:01:01,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:01:01,762 INFO L87 Difference]: Start difference. First operand 359 states and 1113 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:01,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:01,951 INFO L93 Difference]: Finished difference Result 404 states and 1226 transitions. [2021-03-10 22:01:01,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:01,951 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:01,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:01,952 INFO L225 Difference]: With dead ends: 404 [2021-03-10 22:01:01,952 INFO L226 Difference]: Without dead ends: 404 [2021-03-10 22:01:01,952 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:01,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-03-10 22:01:01,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 349. [2021-03-10 22:01:01,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1149425287356323) internal successors, (1084), 348 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:01,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1084 transitions. [2021-03-10 22:01:01,956 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1084 transitions. Word has length 20 [2021-03-10 22:01:01,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:01,956 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 1084 transitions. [2021-03-10 22:01:01,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1084 transitions. [2021-03-10 22:01:01,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:01,957 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:01,957 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:02,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1465 [2021-03-10 22:01:02,163 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:02,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:02,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1938346827, now seen corresponding path program 143 times [2021-03-10 22:01:02,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:02,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423317816] [2021-03-10 22:01:02,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:02,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423317816] [2021-03-10 22:01:02,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814306392] [2021-03-10 22:01:02,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:02,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:02,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:02,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:02,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:02,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:02,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:02,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750893975] [2021-03-10 22:01:02,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:02,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:02,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:02,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:02,404 INFO L87 Difference]: Start difference. First operand 349 states and 1084 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:02,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:02,547 INFO L93 Difference]: Finished difference Result 424 states and 1271 transitions. [2021-03-10 22:01:02,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:02,547 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:02,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:02,548 INFO L225 Difference]: With dead ends: 424 [2021-03-10 22:01:02,548 INFO L226 Difference]: Without dead ends: 424 [2021-03-10 22:01:02,548 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 202.4ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:01:02,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-03-10 22:01:02,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 357. [2021-03-10 22:01:02,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.1320224719101124) internal successors, (1115), 356 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:02,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1115 transitions. [2021-03-10 22:01:02,552 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1115 transitions. Word has length 20 [2021-03-10 22:01:02,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:02,552 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 1115 transitions. [2021-03-10 22:01:02,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:02,552 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1115 transitions. [2021-03-10 22:01:02,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:02,552 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:02,552 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:02,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1470,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:02,753 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:02,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:02,753 INFO L82 PathProgramCache]: Analyzing trace with hash 444439105, now seen corresponding path program 144 times [2021-03-10 22:01:02,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:02,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022164794] [2021-03-10 22:01:02,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:02,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:02,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022164794] [2021-03-10 22:01:02,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408160397] [2021-03-10 22:01:02,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:02,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:01:02,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:02,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:02,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:02,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:02,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:02,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419929801] [2021-03-10 22:01:02,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:02,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:02,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:02,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:02,975 INFO L87 Difference]: Start difference. First operand 357 states and 1115 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:03,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:03,141 INFO L93 Difference]: Finished difference Result 430 states and 1278 transitions. [2021-03-10 22:01:03,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:01:03,141 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:03,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:03,142 INFO L225 Difference]: With dead ends: 430 [2021-03-10 22:01:03,142 INFO L226 Difference]: Without dead ends: 424 [2021-03-10 22:01:03,142 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:03,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-03-10 22:01:03,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 354. [2021-03-10 22:01:03,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.1274787535410766) internal successors, (1104), 353 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:03,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1104 transitions. [2021-03-10 22:01:03,147 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1104 transitions. Word has length 20 [2021-03-10 22:01:03,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:03,147 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 1104 transitions. [2021-03-10 22:01:03,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:03,147 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1104 transitions. [2021-03-10 22:01:03,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:03,148 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:03,148 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:03,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1477 [2021-03-10 22:01:03,351 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:03,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:03,351 INFO L82 PathProgramCache]: Analyzing trace with hash 982294683, now seen corresponding path program 145 times [2021-03-10 22:01:03,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:03,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247757345] [2021-03-10 22:01:03,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:03,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247757345] [2021-03-10 22:01:03,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168367157] [2021-03-10 22:01:03,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:03,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:03,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:03,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:03,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:03,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130321544] [2021-03-10 22:01:03,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:03,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:03,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:03,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:03,584 INFO L87 Difference]: Start difference. First operand 354 states and 1104 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:03,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:03,751 INFO L93 Difference]: Finished difference Result 394 states and 1196 transitions. [2021-03-10 22:01:03,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:03,751 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:03,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:03,751 INFO L225 Difference]: With dead ends: 394 [2021-03-10 22:01:03,752 INFO L226 Difference]: Without dead ends: 382 [2021-03-10 22:01:03,752 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 218.9ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:01:03,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-03-10 22:01:03,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 351. [2021-03-10 22:01:03,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.1228571428571428) internal successors, (1093), 350 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:03,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1093 transitions. [2021-03-10 22:01:03,755 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1093 transitions. Word has length 20 [2021-03-10 22:01:03,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:03,755 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 1093 transitions. [2021-03-10 22:01:03,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:03,756 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1093 transitions. [2021-03-10 22:01:03,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:03,756 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:03,756 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:03,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1487,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:03,956 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:03,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:03,957 INFO L82 PathProgramCache]: Analyzing trace with hash -538043371, now seen corresponding path program 146 times [2021-03-10 22:01:03,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:03,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740367309] [2021-03-10 22:01:03,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:04,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740367309] [2021-03-10 22:01:04,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020973300] [2021-03-10 22:01:04,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:04,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:04,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:04,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:04,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:04,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:04,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:04,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:04,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975620160] [2021-03-10 22:01:04,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:04,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:04,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:04,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:04,197 INFO L87 Difference]: Start difference. First operand 351 states and 1093 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:04,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:04,397 INFO L93 Difference]: Finished difference Result 511 states and 1489 transitions. [2021-03-10 22:01:04,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:01:04,398 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:04,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:04,398 INFO L225 Difference]: With dead ends: 511 [2021-03-10 22:01:04,398 INFO L226 Difference]: Without dead ends: 511 [2021-03-10 22:01:04,398 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 234.9ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:04,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-03-10 22:01:04,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 359. [2021-03-10 22:01:04,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.153631284916201) internal successors, (1129), 358 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:04,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1129 transitions. [2021-03-10 22:01:04,403 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1129 transitions. Word has length 20 [2021-03-10 22:01:04,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:04,403 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 1129 transitions. [2021-03-10 22:01:04,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:04,403 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1129 transitions. [2021-03-10 22:01:04,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:04,403 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:04,403 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:04,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1494,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:04,604 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:04,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:04,604 INFO L82 PathProgramCache]: Analyzing trace with hash -2031951093, now seen corresponding path program 147 times [2021-03-10 22:01:04,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:04,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397172914] [2021-03-10 22:01:04,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:04,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397172914] [2021-03-10 22:01:04,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776458763] [2021-03-10 22:01:04,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:04,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:01:04,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:04,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:04,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:04,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:04,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:04,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:04,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858915796] [2021-03-10 22:01:04,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:04,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:04,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:04,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:04,862 INFO L87 Difference]: Start difference. First operand 359 states and 1129 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:05,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:05,102 INFO L93 Difference]: Finished difference Result 517 states and 1490 transitions. [2021-03-10 22:01:05,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:01:05,102 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:05,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:05,103 INFO L225 Difference]: With dead ends: 517 [2021-03-10 22:01:05,103 INFO L226 Difference]: Without dead ends: 511 [2021-03-10 22:01:05,103 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 272.1ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-03-10 22:01:05,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 362. [2021-03-10 22:01:05,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 3.1329639889196677) internal successors, (1131), 361 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:05,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1131 transitions. [2021-03-10 22:01:05,108 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1131 transitions. Word has length 20 [2021-03-10 22:01:05,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:05,108 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 1131 transitions. [2021-03-10 22:01:05,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:05,108 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1131 transitions. [2021-03-10 22:01:05,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:05,108 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:05,108 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:05,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1507 [2021-03-10 22:01:05,309 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:05,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:05,309 INFO L82 PathProgramCache]: Analyzing trace with hash 213357067, now seen corresponding path program 148 times [2021-03-10 22:01:05,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:05,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697573412] [2021-03-10 22:01:05,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:05,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697573412] [2021-03-10 22:01:05,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768360810] [2021-03-10 22:01:05,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:05,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:05,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:05,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:05,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:05,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:05,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:05,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376186667] [2021-03-10 22:01:05,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:05,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:05,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:05,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:05,558 INFO L87 Difference]: Start difference. First operand 362 states and 1131 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:05,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:05,699 INFO L93 Difference]: Finished difference Result 479 states and 1410 transitions. [2021-03-10 22:01:05,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:05,699 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:05,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:05,700 INFO L225 Difference]: With dead ends: 479 [2021-03-10 22:01:05,700 INFO L226 Difference]: Without dead ends: 479 [2021-03-10 22:01:05,700 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 186.0ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:01:05,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-03-10 22:01:05,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 355. [2021-03-10 22:01:05,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.1440677966101696) internal successors, (1113), 354 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:05,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1113 transitions. [2021-03-10 22:01:05,710 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1113 transitions. Word has length 20 [2021-03-10 22:01:05,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:05,710 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1113 transitions. [2021-03-10 22:01:05,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:05,710 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1113 transitions. [2021-03-10 22:01:05,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:05,711 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:05,711 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:05,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1519,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:05,911 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:05,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:05,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1505699467, now seen corresponding path program 149 times [2021-03-10 22:01:05,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:05,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145767864] [2021-03-10 22:01:05,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:05,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145767864] [2021-03-10 22:01:05,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771187339] [2021-03-10 22:01:05,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:06,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:01:06,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:06,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:06,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:06,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:06,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:06,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555593562] [2021-03-10 22:01:06,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:06,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:06,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:06,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:06,174 INFO L87 Difference]: Start difference. First operand 355 states and 1113 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:06,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:06,342 INFO L93 Difference]: Finished difference Result 442 states and 1328 transitions. [2021-03-10 22:01:06,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:06,342 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:06,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:06,343 INFO L225 Difference]: With dead ends: 442 [2021-03-10 22:01:06,343 INFO L226 Difference]: Without dead ends: 442 [2021-03-10 22:01:06,343 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 189.3ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:01:06,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-03-10 22:01:06,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 352. [2021-03-10 22:01:06,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.128205128205128) internal successors, (1098), 351 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:06,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1098 transitions. [2021-03-10 22:01:06,347 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1098 transitions. Word has length 20 [2021-03-10 22:01:06,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:06,347 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 1098 transitions. [2021-03-10 22:01:06,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:06,347 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1098 transitions. [2021-03-10 22:01:06,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:06,348 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:06,348 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:06,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1529,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:06,548 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:06,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:06,549 INFO L82 PathProgramCache]: Analyzing trace with hash 234093595, now seen corresponding path program 150 times [2021-03-10 22:01:06,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:06,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565280362] [2021-03-10 22:01:06,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:06,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565280362] [2021-03-10 22:01:06,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750825807] [2021-03-10 22:01:06,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:06,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:01:06,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:06,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:06,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:06,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:06,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:06,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702662897] [2021-03-10 22:01:06,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:06,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:06,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:06,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:06,760 INFO L87 Difference]: Start difference. First operand 352 states and 1098 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:07,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:07,015 INFO L93 Difference]: Finished difference Result 479 states and 1402 transitions. [2021-03-10 22:01:07,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:01:07,015 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:07,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:07,016 INFO L225 Difference]: With dead ends: 479 [2021-03-10 22:01:07,016 INFO L226 Difference]: Without dead ends: 473 [2021-03-10 22:01:07,016 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 239.9ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:07,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-03-10 22:01:07,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 362. [2021-03-10 22:01:07,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 3.1163434903047094) internal successors, (1125), 361 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:07,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1125 transitions. [2021-03-10 22:01:07,020 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1125 transitions. Word has length 20 [2021-03-10 22:01:07,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:07,020 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 1125 transitions. [2021-03-10 22:01:07,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:07,020 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1125 transitions. [2021-03-10 22:01:07,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:07,020 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:07,021 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:07,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1539,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:07,227 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:07,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:07,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1681330331, now seen corresponding path program 151 times [2021-03-10 22:01:07,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:07,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213197188] [2021-03-10 22:01:07,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:07,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213197188] [2021-03-10 22:01:07,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505943268] [2021-03-10 22:01:07,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:07,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:07,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:07,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:07,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:07,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66806926] [2021-03-10 22:01:07,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:07,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:07,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:07,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:07,475 INFO L87 Difference]: Start difference. First operand 362 states and 1125 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:07,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:07,692 INFO L93 Difference]: Finished difference Result 456 states and 1363 transitions. [2021-03-10 22:01:07,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:01:07,692 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:07,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:07,693 INFO L225 Difference]: With dead ends: 456 [2021-03-10 22:01:07,693 INFO L226 Difference]: Without dead ends: 456 [2021-03-10 22:01:07,693 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 245.3ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:07,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-03-10 22:01:07,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 351. [2021-03-10 22:01:07,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.1228571428571428) internal successors, (1093), 350 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:07,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1093 transitions. [2021-03-10 22:01:07,697 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1093 transitions. Word has length 20 [2021-03-10 22:01:07,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:07,697 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 1093 transitions. [2021-03-10 22:01:07,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:07,697 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1093 transitions. [2021-03-10 22:01:07,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:07,698 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:07,698 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:07,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1547,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:07,898 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:07,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:07,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1784764021, now seen corresponding path program 152 times [2021-03-10 22:01:07,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:07,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252367063] [2021-03-10 22:01:07,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:07,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:07,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252367063] [2021-03-10 22:01:07,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780047196] [2021-03-10 22:01:07,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:07,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:07,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:07,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:07,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:08,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:08,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:08,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:08,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784942615] [2021-03-10 22:01:08,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:08,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:08,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:08,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:08,145 INFO L87 Difference]: Start difference. First operand 351 states and 1093 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:08,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:08,364 INFO L93 Difference]: Finished difference Result 396 states and 1200 transitions. [2021-03-10 22:01:08,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:08,364 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:08,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:08,365 INFO L225 Difference]: With dead ends: 396 [2021-03-10 22:01:08,365 INFO L226 Difference]: Without dead ends: 384 [2021-03-10 22:01:08,365 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 258.1ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:01:08,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-03-10 22:01:08,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 353. [2021-03-10 22:01:08,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.1193181818181817) internal successors, (1098), 352 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:08,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1098 transitions. [2021-03-10 22:01:08,368 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1098 transitions. Word has length 20 [2021-03-10 22:01:08,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:08,368 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 1098 transitions. [2021-03-10 22:01:08,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:08,369 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1098 transitions. [2021-03-10 22:01:08,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:08,369 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:08,369 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:08,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1561 [2021-03-10 22:01:08,583 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:08,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:08,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1033363583, now seen corresponding path program 153 times [2021-03-10 22:01:08,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:08,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793516851] [2021-03-10 22:01:08,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:08,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:08,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793516851] [2021-03-10 22:01:08,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016418080] [2021-03-10 22:01:08,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:08,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:01:08,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:08,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:08,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:08,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:08,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:08,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19266573] [2021-03-10 22:01:08,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:08,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:08,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:08,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:08,852 INFO L87 Difference]: Start difference. First operand 353 states and 1098 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:09,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:09,065 INFO L93 Difference]: Finished difference Result 421 states and 1252 transitions. [2021-03-10 22:01:09,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:01:09,065 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:09,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:09,066 INFO L225 Difference]: With dead ends: 421 [2021-03-10 22:01:09,066 INFO L226 Difference]: Without dead ends: 415 [2021-03-10 22:01:09,066 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 279.1ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:09,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-03-10 22:01:09,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 363. [2021-03-10 22:01:09,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.1077348066298343) internal successors, (1125), 362 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:09,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1125 transitions. [2021-03-10 22:01:09,070 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1125 transitions. Word has length 20 [2021-03-10 22:01:09,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:09,071 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 1125 transitions. [2021-03-10 22:01:09,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:09,071 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1125 transitions. [2021-03-10 22:01:09,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:09,071 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:09,071 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:09,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1571,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:09,272 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:09,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:09,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1346179787, now seen corresponding path program 154 times [2021-03-10 22:01:09,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:09,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910339657] [2021-03-10 22:01:09,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:09,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910339657] [2021-03-10 22:01:09,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519173572] [2021-03-10 22:01:09,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:09,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:09,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:09,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:09,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:09,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:09,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:09,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745897845] [2021-03-10 22:01:09,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:09,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:09,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:09,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:09,511 INFO L87 Difference]: Start difference. First operand 363 states and 1125 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:09,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:09,675 INFO L93 Difference]: Finished difference Result 392 states and 1198 transitions. [2021-03-10 22:01:09,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:09,675 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:09,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:09,676 INFO L225 Difference]: With dead ends: 392 [2021-03-10 22:01:09,676 INFO L226 Difference]: Without dead ends: 392 [2021-03-10 22:01:09,676 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 214.5ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:01:09,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-03-10 22:01:09,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 350. [2021-03-10 22:01:09,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.1174785100286533) internal successors, (1088), 349 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:09,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1088 transitions. [2021-03-10 22:01:09,680 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1088 transitions. Word has length 20 [2021-03-10 22:01:09,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:09,680 INFO L480 AbstractCegarLoop]: Abstraction has 350 states and 1088 transitions. [2021-03-10 22:01:09,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:09,680 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1088 transitions. [2021-03-10 22:01:09,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:09,680 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:09,680 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:09,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1580,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:09,883 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:09,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:09,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1598821461, now seen corresponding path program 155 times [2021-03-10 22:01:09,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:09,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343968530] [2021-03-10 22:01:09,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:09,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343968530] [2021-03-10 22:01:09,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958441359] [2021-03-10 22:01:09,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:09,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:01:09,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:09,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:01:09,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:10,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:01:10,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:10,053 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:10,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:10,056 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:10,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:10,058 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:10,059 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:10,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:01:10,062 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:10,064 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:10,065 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:10,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:10,067 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:10,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:10,071 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:10,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:01:10,074 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:10,076 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:10,076 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:10,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:10,079 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:10,122 INFO L628 ElimStorePlain]: treesize reduction 21, result has 70.0 percent of original size [2021-03-10 22:01:10,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:01:10,123 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:258, output treesize:49 [2021-03-10 22:01:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:10,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:10,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:01:10,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728956614] [2021-03-10 22:01:10,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:01:10,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:10,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:01:10,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:01:10,235 INFO L87 Difference]: Start difference. First operand 350 states and 1088 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:10,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:10,559 INFO L93 Difference]: Finished difference Result 469 states and 1400 transitions. [2021-03-10 22:01:10,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:10,560 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:10,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:10,560 INFO L225 Difference]: With dead ends: 469 [2021-03-10 22:01:10,561 INFO L226 Difference]: Without dead ends: 469 [2021-03-10 22:01:10,561 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 305.4ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:01:10,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-03-10 22:01:10,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 360. [2021-03-10 22:01:10,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.1559888579387185) internal successors, (1133), 359 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:10,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1133 transitions. [2021-03-10 22:01:10,565 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1133 transitions. Word has length 20 [2021-03-10 22:01:10,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:10,571 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 1133 transitions. [2021-03-10 22:01:10,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:10,571 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1133 transitions. [2021-03-10 22:01:10,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:10,571 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:10,571 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:10,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1590,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:10,787 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:10,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:10,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1202238113, now seen corresponding path program 156 times [2021-03-10 22:01:10,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:10,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594594072] [2021-03-10 22:01:10,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:10,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594594072] [2021-03-10 22:01:10,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198781487] [2021-03-10 22:01:10,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:10,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:01:10,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:10,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:10,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:11,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:11,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:11,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893426066] [2021-03-10 22:01:11,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:11,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:11,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:11,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:11,025 INFO L87 Difference]: Start difference. First operand 360 states and 1133 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:11,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:11,191 INFO L93 Difference]: Finished difference Result 475 states and 1401 transitions. [2021-03-10 22:01:11,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:11,191 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:11,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:11,192 INFO L225 Difference]: With dead ends: 475 [2021-03-10 22:01:11,192 INFO L226 Difference]: Without dead ends: 469 [2021-03-10 22:01:11,192 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 226.5ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:11,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-03-10 22:01:11,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 363. [2021-03-10 22:01:11,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.1353591160220993) internal successors, (1135), 362 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:11,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1135 transitions. [2021-03-10 22:01:11,196 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1135 transitions. Word has length 20 [2021-03-10 22:01:11,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:11,197 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 1135 transitions. [2021-03-10 22:01:11,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:11,197 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1135 transitions. [2021-03-10 22:01:11,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:11,197 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:11,197 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:11,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1602 [2021-03-10 22:01:11,399 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:11,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:11,399 INFO L82 PathProgramCache]: Analyzing trace with hash -847421023, now seen corresponding path program 157 times [2021-03-10 22:01:11,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:11,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086134254] [2021-03-10 22:01:11,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:11,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086134254] [2021-03-10 22:01:11,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872671053] [2021-03-10 22:01:11,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:11,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:11,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:11,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:11,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:11,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621556127] [2021-03-10 22:01:11,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:11,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:11,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:11,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:11,633 INFO L87 Difference]: Start difference. First operand 363 states and 1135 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:11,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:11,812 INFO L93 Difference]: Finished difference Result 527 states and 1543 transitions. [2021-03-10 22:01:11,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:11,812 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:11,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:11,813 INFO L225 Difference]: With dead ends: 527 [2021-03-10 22:01:11,813 INFO L226 Difference]: Without dead ends: 527 [2021-03-10 22:01:11,813 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 199.5ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:01:11,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-03-10 22:01:11,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 366. [2021-03-10 22:01:11,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.1506849315068495) internal successors, (1150), 365 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:11,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1150 transitions. [2021-03-10 22:01:11,818 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1150 transitions. Word has length 20 [2021-03-10 22:01:11,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:11,818 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1150 transitions. [2021-03-10 22:01:11,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:11,818 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1150 transitions. [2021-03-10 22:01:11,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:11,818 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:11,818 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:12,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1612,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:12,019 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:12,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:12,019 INFO L82 PathProgramCache]: Analyzing trace with hash 444921377, now seen corresponding path program 158 times [2021-03-10 22:01:12,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:12,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340003418] [2021-03-10 22:01:12,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:12,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:12,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340003418] [2021-03-10 22:01:12,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795808050] [2021-03-10 22:01:12,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:12,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:12,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:12,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:12,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:12,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:12,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:12,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260988175] [2021-03-10 22:01:12,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:12,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:12,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:12,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:12,224 INFO L87 Difference]: Start difference. First operand 366 states and 1150 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:12,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:12,423 INFO L93 Difference]: Finished difference Result 490 states and 1461 transitions. [2021-03-10 22:01:12,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:12,423 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:12,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:12,424 INFO L225 Difference]: With dead ends: 490 [2021-03-10 22:01:12,424 INFO L226 Difference]: Without dead ends: 490 [2021-03-10 22:01:12,424 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 171.6ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:01:12,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-03-10 22:01:12,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 363. [2021-03-10 22:01:12,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.1353591160220993) internal successors, (1135), 362 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:12,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1135 transitions. [2021-03-10 22:01:12,429 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1135 transitions. Word has length 20 [2021-03-10 22:01:12,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:12,429 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 1135 transitions. [2021-03-10 22:01:12,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:12,429 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1135 transitions. [2021-03-10 22:01:12,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:12,429 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:12,429 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:12,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1622 [2021-03-10 22:01:12,630 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:12,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:12,630 INFO L82 PathProgramCache]: Analyzing trace with hash -826684495, now seen corresponding path program 159 times [2021-03-10 22:01:12,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:12,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110471077] [2021-03-10 22:01:12,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:12,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:12,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110471077] [2021-03-10 22:01:12,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597487504] [2021-03-10 22:01:12,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:12,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:01:12,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:12,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:12,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:12,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:12,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:12,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933315873] [2021-03-10 22:01:12,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:12,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:12,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:12,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:12,848 INFO L87 Difference]: Start difference. First operand 363 states and 1135 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:13,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:13,052 INFO L93 Difference]: Finished difference Result 515 states and 1495 transitions. [2021-03-10 22:01:13,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:13,052 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:13,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:13,053 INFO L225 Difference]: With dead ends: 515 [2021-03-10 22:01:13,053 INFO L226 Difference]: Without dead ends: 509 [2021-03-10 22:01:13,053 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 202.9ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:13,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-03-10 22:01:13,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 367. [2021-03-10 22:01:13,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.139344262295082) internal successors, (1149), 366 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:13,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1149 transitions. [2021-03-10 22:01:13,058 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1149 transitions. Word has length 20 [2021-03-10 22:01:13,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:13,058 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 1149 transitions. [2021-03-10 22:01:13,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:13,058 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1149 transitions. [2021-03-10 22:01:13,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:13,059 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:13,059 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:13,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1635,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:13,275 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:13,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:13,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1552858875, now seen corresponding path program 160 times [2021-03-10 22:01:13,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:13,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690647735] [2021-03-10 22:01:13,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:13,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690647735] [2021-03-10 22:01:13,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886218873] [2021-03-10 22:01:13,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:13,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:13,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:13,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:13,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:13,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:13,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:13,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117179196] [2021-03-10 22:01:13,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:13,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:13,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:13,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:13,492 INFO L87 Difference]: Start difference. First operand 367 states and 1149 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:13,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:13,734 INFO L93 Difference]: Finished difference Result 521 states and 1516 transitions. [2021-03-10 22:01:13,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:01:13,734 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:13,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:13,735 INFO L225 Difference]: With dead ends: 521 [2021-03-10 22:01:13,735 INFO L226 Difference]: Without dead ends: 521 [2021-03-10 22:01:13,735 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 229.4ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:13,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-03-10 22:01:13,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 364. [2021-03-10 22:01:13,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 3.1377410468319558) internal successors, (1139), 363 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:13,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1139 transitions. [2021-03-10 22:01:13,740 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1139 transitions. Word has length 20 [2021-03-10 22:01:13,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:13,740 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 1139 transitions. [2021-03-10 22:01:13,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:13,740 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1139 transitions. [2021-03-10 22:01:13,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:13,740 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:13,740 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:13,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1644 [2021-03-10 22:01:13,951 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:13,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:13,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1335117643, now seen corresponding path program 161 times [2021-03-10 22:01:13,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:13,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688700215] [2021-03-10 22:01:13,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:14,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688700215] [2021-03-10 22:01:14,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394559868] [2021-03-10 22:01:14,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:14,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:01:14,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:14,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:01:14,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:14,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:01:14,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:01:14,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,139 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:14,140 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,142 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:14,142 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,144 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:14,145 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,147 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:14,147 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:14,150 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:14,179 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.0 percent of original size [2021-03-10 22:01:14,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:01:14,180 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:163, output treesize:38 [2021-03-10 22:01:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:14,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:14,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:01:14,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605554700] [2021-03-10 22:01:14,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:01:14,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:14,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:01:14,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:01:14,247 INFO L87 Difference]: Start difference. First operand 364 states and 1139 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:14,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:14,499 INFO L93 Difference]: Finished difference Result 451 states and 1361 transitions. [2021-03-10 22:01:14,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:14,499 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:14,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:14,500 INFO L225 Difference]: With dead ends: 451 [2021-03-10 22:01:14,500 INFO L226 Difference]: Without dead ends: 451 [2021-03-10 22:01:14,500 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 237.3ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-03-10 22:01:14,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 365. [2021-03-10 22:01:14,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.1346153846153846) internal successors, (1141), 364 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:14,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1141 transitions. [2021-03-10 22:01:14,504 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1141 transitions. Word has length 20 [2021-03-10 22:01:14,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:14,504 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 1141 transitions. [2021-03-10 22:01:14,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:14,504 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1141 transitions. [2021-03-10 22:01:14,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:14,504 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:14,504 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:14,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1657 [2021-03-10 22:01:14,705 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:14,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:14,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1667507253, now seen corresponding path program 162 times [2021-03-10 22:01:14,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:14,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399346909] [2021-03-10 22:01:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:14,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399346909] [2021-03-10 22:01:14,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168236589] [2021-03-10 22:01:14,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:14,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:01:14,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:14,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:14,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:14,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:14,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:14,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:14,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81233162] [2021-03-10 22:01:14,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:14,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:14,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:14,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:14,933 INFO L87 Difference]: Start difference. First operand 365 states and 1141 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:15,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:15,117 INFO L93 Difference]: Finished difference Result 439 states and 1328 transitions. [2021-03-10 22:01:15,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:15,118 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:15,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:15,119 INFO L225 Difference]: With dead ends: 439 [2021-03-10 22:01:15,119 INFO L226 Difference]: Without dead ends: 439 [2021-03-10 22:01:15,119 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 221.2ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:15,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-03-10 22:01:15,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 354. [2021-03-10 22:01:15,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.1274787535410766) internal successors, (1104), 353 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:15,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1104 transitions. [2021-03-10 22:01:15,123 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1104 transitions. Word has length 20 [2021-03-10 22:01:15,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:15,123 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 1104 transitions. [2021-03-10 22:01:15,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:15,123 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1104 transitions. [2021-03-10 22:01:15,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:15,123 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:15,124 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:15,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1672 [2021-03-10 22:01:15,324 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:15,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:15,324 INFO L82 PathProgramCache]: Analyzing trace with hash 731595007, now seen corresponding path program 163 times [2021-03-10 22:01:15,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:15,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845160124] [2021-03-10 22:01:15,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:15,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845160124] [2021-03-10 22:01:15,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702448933] [2021-03-10 22:01:15,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:15,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:15,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:15,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:15,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:15,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:01:15,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535323649] [2021-03-10 22:01:15,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:01:15,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:15,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:01:15,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:01:15,562 INFO L87 Difference]: Start difference. First operand 354 states and 1104 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:15,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:15,760 INFO L93 Difference]: Finished difference Result 394 states and 1206 transitions. [2021-03-10 22:01:15,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:15,760 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:15,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:15,761 INFO L225 Difference]: With dead ends: 394 [2021-03-10 22:01:15,761 INFO L226 Difference]: Without dead ends: 394 [2021-03-10 22:01:15,761 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 232.4ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:01:15,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-03-10 22:01:15,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 351. [2021-03-10 22:01:15,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.12) internal successors, (1092), 350 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:15,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1092 transitions. [2021-03-10 22:01:15,765 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1092 transitions. Word has length 20 [2021-03-10 22:01:15,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:15,765 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 1092 transitions. [2021-03-10 22:01:15,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:15,765 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1092 transitions. [2021-03-10 22:01:15,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:15,766 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:15,766 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:15,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1679,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:15,966 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:15,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:15,967 INFO L82 PathProgramCache]: Analyzing trace with hash 88396993, now seen corresponding path program 164 times [2021-03-10 22:01:15,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:15,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967944665] [2021-03-10 22:01:15,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:16,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967944665] [2021-03-10 22:01:16,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900315588] [2021-03-10 22:01:16,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:16,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:16,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:16,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:16,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:16,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:16,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:16,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:16,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696980317] [2021-03-10 22:01:16,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:16,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:16,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:16,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:16,160 INFO L87 Difference]: Start difference. First operand 351 states and 1092 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:16,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:16,329 INFO L93 Difference]: Finished difference Result 439 states and 1300 transitions. [2021-03-10 22:01:16,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:16,329 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:16,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:16,330 INFO L225 Difference]: With dead ends: 439 [2021-03-10 22:01:16,330 INFO L226 Difference]: Without dead ends: 433 [2021-03-10 22:01:16,330 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 186.6ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:16,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-03-10 22:01:16,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 365. [2021-03-10 22:01:16,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.107142857142857) internal successors, (1131), 364 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:16,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1131 transitions. [2021-03-10 22:01:16,334 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1131 transitions. Word has length 20 [2021-03-10 22:01:16,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:16,334 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 1131 transitions. [2021-03-10 22:01:16,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:16,334 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1131 transitions. [2021-03-10 22:01:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:16,335 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:16,335 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:16,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1686 [2021-03-10 22:01:16,535 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:16,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:16,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1827026933, now seen corresponding path program 165 times [2021-03-10 22:01:16,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:16,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989096517] [2021-03-10 22:01:16,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:16,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:16,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989096517] [2021-03-10 22:01:16,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549410901] [2021-03-10 22:01:16,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:16,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:01:16,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:16,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:16,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:16,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:16,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:16,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206514074] [2021-03-10 22:01:16,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:16,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:16,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:16,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:16,732 INFO L87 Difference]: Start difference. First operand 365 states and 1131 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:16,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:16,928 INFO L93 Difference]: Finished difference Result 445 states and 1321 transitions. [2021-03-10 22:01:16,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:01:16,928 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:16,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:16,929 INFO L225 Difference]: With dead ends: 445 [2021-03-10 22:01:16,929 INFO L226 Difference]: Without dead ends: 445 [2021-03-10 22:01:16,929 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 198.1ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:16,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-03-10 22:01:16,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 363. [2021-03-10 22:01:16,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.110497237569061) internal successors, (1126), 362 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:16,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1126 transitions. [2021-03-10 22:01:16,933 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1126 transitions. Word has length 20 [2021-03-10 22:01:16,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:16,934 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 1126 transitions. [2021-03-10 22:01:16,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:16,934 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1126 transitions. [2021-03-10 22:01:16,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:16,934 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:16,934 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:17,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1694 [2021-03-10 22:01:17,135 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:17,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:17,135 INFO L82 PathProgramCache]: Analyzing trace with hash -786791135, now seen corresponding path program 166 times [2021-03-10 22:01:17,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:17,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917788570] [2021-03-10 22:01:17,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:17,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917788570] [2021-03-10 22:01:17,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065259052] [2021-03-10 22:01:17,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:17,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:17,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:17,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:17,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:17,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:17,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:01:17,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235802691] [2021-03-10 22:01:17,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:01:17,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:17,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:01:17,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:01:17,347 INFO L87 Difference]: Start difference. First operand 363 states and 1126 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:17,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:17,525 INFO L93 Difference]: Finished difference Result 414 states and 1256 transitions. [2021-03-10 22:01:17,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:17,525 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:17,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:17,526 INFO L225 Difference]: With dead ends: 414 [2021-03-10 22:01:17,526 INFO L226 Difference]: Without dead ends: 414 [2021-03-10 22:01:17,526 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 209.5ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:01:17,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-03-10 22:01:17,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 350. [2021-03-10 22:01:17,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.1174785100286533) internal successors, (1088), 349 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:17,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1088 transitions. [2021-03-10 22:01:17,530 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1088 transitions. Word has length 20 [2021-03-10 22:01:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:17,530 INFO L480 AbstractCegarLoop]: Abstraction has 350 states and 1088 transitions. [2021-03-10 22:01:17,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:17,530 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1088 transitions. [2021-03-10 22:01:17,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:17,531 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:17,531 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:17,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1702 [2021-03-10 22:01:17,731 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:17,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:17,733 INFO L82 PathProgramCache]: Analyzing trace with hash 812958331, now seen corresponding path program 167 times [2021-03-10 22:01:17,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:17,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570225217] [2021-03-10 22:01:17,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:17,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570225217] [2021-03-10 22:01:17,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768207600] [2021-03-10 22:01:17,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:17,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:17,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:17,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:17,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:17,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:17,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:01:17,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778175364] [2021-03-10 22:01:17,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:01:17,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:17,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:01:17,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:01:17,909 INFO L87 Difference]: Start difference. First operand 350 states and 1088 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:18,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:18,066 INFO L93 Difference]: Finished difference Result 384 states and 1167 transitions. [2021-03-10 22:01:18,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:18,066 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:18,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:18,067 INFO L225 Difference]: With dead ends: 384 [2021-03-10 22:01:18,067 INFO L226 Difference]: Without dead ends: 372 [2021-03-10 22:01:18,067 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:01:18,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-03-10 22:01:18,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 354. [2021-03-10 22:01:18,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.1104815864022664) internal successors, (1098), 353 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:18,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1098 transitions. [2021-03-10 22:01:18,071 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1098 transitions. Word has length 20 [2021-03-10 22:01:18,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:18,071 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 1098 transitions. [2021-03-10 22:01:18,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:18,072 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1098 transitions. [2021-03-10 22:01:18,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:18,072 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:18,072 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:18,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1707,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:18,283 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:18,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:18,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1564358769, now seen corresponding path program 168 times [2021-03-10 22:01:18,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:18,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170780765] [2021-03-10 22:01:18,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:18,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:18,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170780765] [2021-03-10 22:01:18,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907807885] [2021-03-10 22:01:18,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:18,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:01:18,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:18,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:18,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:18,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:18,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:01:18,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097684648] [2021-03-10 22:01:18,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:01:18,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:18,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:01:18,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:01:18,460 INFO L87 Difference]: Start difference. First operand 354 states and 1098 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:18,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:18,611 INFO L93 Difference]: Finished difference Result 409 states and 1219 transitions. [2021-03-10 22:01:18,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:01:18,611 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:18,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:18,612 INFO L225 Difference]: With dead ends: 409 [2021-03-10 22:01:18,612 INFO L226 Difference]: Without dead ends: 403 [2021-03-10 22:01:18,612 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 163.3ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:18,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-03-10 22:01:18,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 364. [2021-03-10 22:01:18,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 3.0991735537190084) internal successors, (1125), 363 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1125 transitions. [2021-03-10 22:01:18,616 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1125 transitions. Word has length 20 [2021-03-10 22:01:18,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:18,616 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 1125 transitions. [2021-03-10 22:01:18,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:18,616 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1125 transitions. [2021-03-10 22:01:18,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:18,617 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:18,617 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:18,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1713 [2021-03-10 22:01:18,817 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:18,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:18,818 INFO L82 PathProgramCache]: Analyzing trace with hash -351065157, now seen corresponding path program 169 times [2021-03-10 22:01:18,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:18,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631427775] [2021-03-10 22:01:18,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:18,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:18,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631427775] [2021-03-10 22:01:18,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280790263] [2021-03-10 22:01:18,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:18,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:18,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:18,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:18,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:01:18,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572729643] [2021-03-10 22:01:18,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:01:18,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:18,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:01:18,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:01:18,995 INFO L87 Difference]: Start difference. First operand 364 states and 1125 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:19,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:19,105 INFO L93 Difference]: Finished difference Result 380 states and 1165 transitions. [2021-03-10 22:01:19,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:19,105 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:19,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:19,106 INFO L225 Difference]: With dead ends: 380 [2021-03-10 22:01:19,106 INFO L226 Difference]: Without dead ends: 380 [2021-03-10 22:01:19,106 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 132.1ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:19,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-03-10 22:01:19,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 352. [2021-03-10 22:01:19,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.113960113960114) internal successors, (1093), 351 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:19,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1093 transitions. [2021-03-10 22:01:19,110 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1093 transitions. Word has length 20 [2021-03-10 22:01:19,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:19,110 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 1093 transitions. [2021-03-10 22:01:19,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:19,110 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1093 transitions. [2021-03-10 22:01:19,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:19,110 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:19,110 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:19,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1718,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:19,311 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:19,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:19,311 INFO L82 PathProgramCache]: Analyzing trace with hash -548069861, now seen corresponding path program 170 times [2021-03-10 22:01:19,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:19,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639957673] [2021-03-10 22:01:19,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:19,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:19,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639957673] [2021-03-10 22:01:19,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579697980] [2021-03-10 22:01:19,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:19,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:19,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:19,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:19,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:19,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:19,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:01:19,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309458374] [2021-03-10 22:01:19,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:01:19,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:19,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:01:19,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:01:19,485 INFO L87 Difference]: Start difference. First operand 352 states and 1093 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:19,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:19,613 INFO L93 Difference]: Finished difference Result 415 states and 1234 transitions. [2021-03-10 22:01:19,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:19,613 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:19,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:19,614 INFO L225 Difference]: With dead ends: 415 [2021-03-10 22:01:19,614 INFO L226 Difference]: Without dead ends: 409 [2021-03-10 22:01:19,614 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:01:19,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-03-10 22:01:19,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 366. [2021-03-10 22:01:19,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.1013698630136988) internal successors, (1132), 365 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:19,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1132 transitions. [2021-03-10 22:01:19,617 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1132 transitions. Word has length 20 [2021-03-10 22:01:19,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:19,617 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1132 transitions. [2021-03-10 22:01:19,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:19,618 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1132 transitions. [2021-03-10 22:01:19,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:19,618 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:19,618 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:19,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1722 [2021-03-10 22:01:19,818 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:19,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:19,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1831473509, now seen corresponding path program 171 times [2021-03-10 22:01:19,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:19,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323528545] [2021-03-10 22:01:19,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:19,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323528545] [2021-03-10 22:01:19,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164624161] [2021-03-10 22:01:19,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:19,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:01:19,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:19,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:19,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:20,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:20,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:01:20,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956391854] [2021-03-10 22:01:20,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:01:20,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:20,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:01:20,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:01:20,019 INFO L87 Difference]: Start difference. First operand 366 states and 1132 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:20,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:20,153 INFO L93 Difference]: Finished difference Result 415 states and 1240 transitions. [2021-03-10 22:01:20,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:01:20,153 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:20,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:20,154 INFO L225 Difference]: With dead ends: 415 [2021-03-10 22:01:20,154 INFO L226 Difference]: Without dead ends: 415 [2021-03-10 22:01:20,154 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:01:20,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-03-10 22:01:20,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 364. [2021-03-10 22:01:20,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 3.1046831955922864) internal successors, (1127), 363 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:20,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1127 transitions. [2021-03-10 22:01:20,158 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1127 transitions. Word has length 20 [2021-03-10 22:01:20,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:20,158 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 1127 transitions. [2021-03-10 22:01:20,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:20,158 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1127 transitions. [2021-03-10 22:01:20,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:20,158 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:20,158 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:20,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1727,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:20,359 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:20,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:20,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1423257989, now seen corresponding path program 172 times [2021-03-10 22:01:20,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:20,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912198065] [2021-03-10 22:01:20,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:20,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:20,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912198065] [2021-03-10 22:01:20,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005381760] [2021-03-10 22:01:20,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:20,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:20,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:20,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:20,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:20,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:20,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:20,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:01:20,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617044699] [2021-03-10 22:01:20,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:01:20,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:20,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:01:20,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:01:20,515 INFO L87 Difference]: Start difference. First operand 364 states and 1127 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:20,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:20,620 INFO L93 Difference]: Finished difference Result 390 states and 1190 transitions. [2021-03-10 22:01:20,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:20,621 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:20,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:20,621 INFO L225 Difference]: With dead ends: 390 [2021-03-10 22:01:20,621 INFO L226 Difference]: Without dead ends: 390 [2021-03-10 22:01:20,621 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:20,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-03-10 22:01:20,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 352. [2021-03-10 22:01:20,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.113960113960114) internal successors, (1093), 351 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:20,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1093 transitions. [2021-03-10 22:01:20,625 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1093 transitions. Word has length 20 [2021-03-10 22:01:20,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:20,625 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 1093 transitions. [2021-03-10 22:01:20,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:20,625 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1093 transitions. [2021-03-10 22:01:20,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:20,626 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:20,626 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:20,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1732 [2021-03-10 22:01:20,826 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:20,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:20,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1541923549, now seen corresponding path program 173 times [2021-03-10 22:01:20,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:20,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780969116] [2021-03-10 22:01:20,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:20,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:20,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780969116] [2021-03-10 22:01:20,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430890447] [2021-03-10 22:01:20,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:20,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:20,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:20,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:20,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:21,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:21,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:21,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895333938] [2021-03-10 22:01:21,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:21,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:21,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:21,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:21,073 INFO L87 Difference]: Start difference. First operand 352 states and 1093 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:21,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:21,366 INFO L93 Difference]: Finished difference Result 579 states and 1743 transitions. [2021-03-10 22:01:21,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:21,367 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:21,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:21,367 INFO L225 Difference]: With dead ends: 579 [2021-03-10 22:01:21,367 INFO L226 Difference]: Without dead ends: 579 [2021-03-10 22:01:21,368 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 334.9ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:21,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-03-10 22:01:21,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 363. [2021-03-10 22:01:21,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.1353591160220993) internal successors, (1135), 362 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:21,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1135 transitions. [2021-03-10 22:01:21,372 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1135 transitions. Word has length 20 [2021-03-10 22:01:21,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:21,372 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 1135 transitions. [2021-03-10 22:01:21,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:21,372 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1135 transitions. [2021-03-10 22:01:21,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:21,373 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:21,373 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:21,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1734 [2021-03-10 22:01:21,583 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:21,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:21,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1259136025, now seen corresponding path program 174 times [2021-03-10 22:01:21,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:21,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814483898] [2021-03-10 22:01:21,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:21,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814483898] [2021-03-10 22:01:21,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671344464] [2021-03-10 22:01:21,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:21,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:01:21,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:21,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:21,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:21,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:21,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:21,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:21,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741272401] [2021-03-10 22:01:21,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:21,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:21,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:21,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:21,826 INFO L87 Difference]: Start difference. First operand 363 states and 1135 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:22,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:22,224 INFO L93 Difference]: Finished difference Result 585 states and 1750 transitions. [2021-03-10 22:01:22,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:01:22,224 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:22,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:22,225 INFO L225 Difference]: With dead ends: 585 [2021-03-10 22:01:22,225 INFO L226 Difference]: Without dead ends: 579 [2021-03-10 22:01:22,225 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 397.6ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:01:22,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-03-10 22:01:22,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 360. [2021-03-10 22:01:22,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.13091922005571) internal successors, (1124), 359 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:22,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1124 transitions. [2021-03-10 22:01:22,230 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1124 transitions. Word has length 20 [2021-03-10 22:01:22,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:22,230 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 1124 transitions. [2021-03-10 22:01:22,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:22,230 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1124 transitions. [2021-03-10 22:01:22,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:22,231 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:22,231 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:22,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1747,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:22,446 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:22,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:22,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1796991603, now seen corresponding path program 175 times [2021-03-10 22:01:22,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:22,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014931101] [2021-03-10 22:01:22,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:22,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014931101] [2021-03-10 22:01:22,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466404707] [2021-03-10 22:01:22,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:22,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:22,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:22,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:22,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:22,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456555227] [2021-03-10 22:01:22,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:22,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:22,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:22,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:22,687 INFO L87 Difference]: Start difference. First operand 360 states and 1124 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:22,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:22,994 INFO L93 Difference]: Finished difference Result 549 states and 1668 transitions. [2021-03-10 22:01:22,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:22,994 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:22,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:22,995 INFO L225 Difference]: With dead ends: 549 [2021-03-10 22:01:22,995 INFO L226 Difference]: Without dead ends: 537 [2021-03-10 22:01:22,995 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 327.9ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:22,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-03-10 22:01:22,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 357. [2021-03-10 22:01:22,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.1264044943820224) internal successors, (1113), 356 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:23,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1113 transitions. [2021-03-10 22:01:23,000 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1113 transitions. Word has length 20 [2021-03-10 22:01:23,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:23,000 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 1113 transitions. [2021-03-10 22:01:23,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:23,000 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1113 transitions. [2021-03-10 22:01:23,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:23,000 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:23,000 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:23,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1754 [2021-03-10 22:01:23,201 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:23,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:23,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1910230371, now seen corresponding path program 176 times [2021-03-10 22:01:23,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:23,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968799542] [2021-03-10 22:01:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:23,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968799542] [2021-03-10 22:01:23,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014723619] [2021-03-10 22:01:23,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:23,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:23,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:23,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:23,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:23,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:23,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:23,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712309196] [2021-03-10 22:01:23,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:23,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:23,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:23,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:23,447 INFO L87 Difference]: Start difference. First operand 357 states and 1113 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:23,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:23,811 INFO L93 Difference]: Finished difference Result 581 states and 1728 transitions. [2021-03-10 22:01:23,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:23,811 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:23,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:23,812 INFO L225 Difference]: With dead ends: 581 [2021-03-10 22:01:23,812 INFO L226 Difference]: Without dead ends: 563 [2021-03-10 22:01:23,812 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 395.4ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:23,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-03-10 22:01:23,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 354. [2021-03-10 22:01:23,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.121813031161473) internal successors, (1102), 353 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:23,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1102 transitions. [2021-03-10 22:01:23,817 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1102 transitions. Word has length 20 [2021-03-10 22:01:23,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:23,817 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 1102 transitions. [2021-03-10 22:01:23,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:23,817 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1102 transitions. [2021-03-10 22:01:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:23,817 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:23,817 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:24,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1761 [2021-03-10 22:01:24,018 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:24,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:24,018 INFO L82 PathProgramCache]: Analyzing trace with hash 711573469, now seen corresponding path program 177 times [2021-03-10 22:01:24,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:24,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789841727] [2021-03-10 22:01:24,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:24,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789841727] [2021-03-10 22:01:24,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41154196] [2021-03-10 22:01:24,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:24,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:01:24,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:24,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:24,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:24,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:24,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:24,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584210219] [2021-03-10 22:01:24,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:24,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:24,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:24,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:24,323 INFO L87 Difference]: Start difference. First operand 354 states and 1102 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:24,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:24,582 INFO L93 Difference]: Finished difference Result 591 states and 1773 transitions. [2021-03-10 22:01:24,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:24,582 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:24,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:24,583 INFO L225 Difference]: With dead ends: 591 [2021-03-10 22:01:24,583 INFO L226 Difference]: Without dead ends: 591 [2021-03-10 22:01:24,583 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 363.7ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:24,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-03-10 22:01:24,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 361. [2021-03-10 22:01:24,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 3.136111111111111) internal successors, (1129), 360 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:24,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1129 transitions. [2021-03-10 22:01:24,588 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1129 transitions. Word has length 20 [2021-03-10 22:01:24,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:24,588 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 1129 transitions. [2021-03-10 22:01:24,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:24,588 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1129 transitions. [2021-03-10 22:01:24,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:24,588 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:24,588 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:24,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1771 [2021-03-10 22:01:24,789 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:24,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:24,789 INFO L82 PathProgramCache]: Analyzing trace with hash -782334253, now seen corresponding path program 178 times [2021-03-10 22:01:24,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:24,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439210655] [2021-03-10 22:01:24,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:24,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439210655] [2021-03-10 22:01:24,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081781618] [2021-03-10 22:01:24,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:24,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:24,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:24,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:24,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:25,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:25,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:25,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576140681] [2021-03-10 22:01:25,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:25,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:25,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:25,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:25,078 INFO L87 Difference]: Start difference. First operand 361 states and 1129 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:25,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:25,344 INFO L93 Difference]: Finished difference Result 597 states and 1780 transitions. [2021-03-10 22:01:25,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:01:25,344 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:25,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:25,345 INFO L225 Difference]: With dead ends: 597 [2021-03-10 22:01:25,345 INFO L226 Difference]: Without dead ends: 591 [2021-03-10 22:01:25,345 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 312.4ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:25,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-03-10 22:01:25,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 358. [2021-03-10 22:01:25,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.1316526610644257) internal successors, (1118), 357 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:25,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1118 transitions. [2021-03-10 22:01:25,350 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1118 transitions. Word has length 20 [2021-03-10 22:01:25,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:25,350 INFO L480 AbstractCegarLoop]: Abstraction has 358 states and 1118 transitions. [2021-03-10 22:01:25,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:25,350 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1118 transitions. [2021-03-10 22:01:25,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:25,350 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:25,350 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:25,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1780,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:25,551 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:25,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:25,551 INFO L82 PathProgramCache]: Analyzing trace with hash -244478675, now seen corresponding path program 179 times [2021-03-10 22:01:25,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:25,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208555894] [2021-03-10 22:01:25,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:25,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208555894] [2021-03-10 22:01:25,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613111117] [2021-03-10 22:01:25,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:25,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:25,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:25,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:25,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:25,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:25,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:25,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267306449] [2021-03-10 22:01:25,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:25,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:25,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:25,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:25,831 INFO L87 Difference]: Start difference. First operand 358 states and 1118 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:26,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:26,062 INFO L93 Difference]: Finished difference Result 561 states and 1698 transitions. [2021-03-10 22:01:26,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:26,062 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:26,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:26,063 INFO L225 Difference]: With dead ends: 561 [2021-03-10 22:01:26,063 INFO L226 Difference]: Without dead ends: 549 [2021-03-10 22:01:26,063 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 297.2ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:26,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-03-10 22:01:26,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 355. [2021-03-10 22:01:26,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.1271186440677967) internal successors, (1107), 354 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:26,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1107 transitions. [2021-03-10 22:01:26,067 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1107 transitions. Word has length 20 [2021-03-10 22:01:26,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:26,068 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1107 transitions. [2021-03-10 22:01:26,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:26,068 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1107 transitions. [2021-03-10 22:01:26,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:26,068 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:26,068 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:26,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1788,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:26,269 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:26,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:26,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1764816729, now seen corresponding path program 180 times [2021-03-10 22:01:26,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:26,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461681598] [2021-03-10 22:01:26,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:26,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:26,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461681598] [2021-03-10 22:01:26,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388021369] [2021-03-10 22:01:26,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:26,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:01:26,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:26,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:26,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:26,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:26,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:26,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925627577] [2021-03-10 22:01:26,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:26,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:26,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:26,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:26,535 INFO L87 Difference]: Start difference. First operand 355 states and 1107 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:26,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:26,952 INFO L93 Difference]: Finished difference Result 669 states and 1970 transitions. [2021-03-10 22:01:26,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:01:26,952 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:26,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:26,953 INFO L225 Difference]: With dead ends: 669 [2021-03-10 22:01:26,953 INFO L226 Difference]: Without dead ends: 669 [2021-03-10 22:01:26,954 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 411.4ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:01:26,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-03-10 22:01:26,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 363. [2021-03-10 22:01:26,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.157458563535912) internal successors, (1143), 362 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:26,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1143 transitions. [2021-03-10 22:01:26,959 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1143 transitions. Word has length 20 [2021-03-10 22:01:26,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:26,959 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 1143 transitions. [2021-03-10 22:01:26,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:26,959 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1143 transitions. [2021-03-10 22:01:26,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:26,959 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:26,959 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:27,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1796 [2021-03-10 22:01:27,160 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:27,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:27,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1036242845, now seen corresponding path program 181 times [2021-03-10 22:01:27,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:27,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646554764] [2021-03-10 22:01:27,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:27,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646554764] [2021-03-10 22:01:27,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346039373] [2021-03-10 22:01:27,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:27,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:27,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:27,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:27,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:27,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843925336] [2021-03-10 22:01:27,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:27,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:27,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:27,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:27,455 INFO L87 Difference]: Start difference. First operand 363 states and 1143 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:28,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:28,007 INFO L93 Difference]: Finished difference Result 675 states and 1971 transitions. [2021-03-10 22:01:28,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:01:28,008 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:28,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:28,008 INFO L225 Difference]: With dead ends: 675 [2021-03-10 22:01:28,009 INFO L226 Difference]: Without dead ends: 669 [2021-03-10 22:01:28,009 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 596.4ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:01:28,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-03-10 22:01:28,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 366. [2021-03-10 22:01:28,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.136986301369863) internal successors, (1145), 365 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:28,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1145 transitions. [2021-03-10 22:01:28,013 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1145 transitions. Word has length 20 [2021-03-10 22:01:28,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:28,013 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1145 transitions. [2021-03-10 22:01:28,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:28,014 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1145 transitions. [2021-03-10 22:01:28,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:28,014 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:28,014 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:28,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1804,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:28,214 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:28,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:28,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1013416291, now seen corresponding path program 182 times [2021-03-10 22:01:28,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:28,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796927924] [2021-03-10 22:01:28,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:28,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:28,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796927924] [2021-03-10 22:01:28,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266388094] [2021-03-10 22:01:28,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:28,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:28,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:28,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:28,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:28,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:28,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:28,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209039811] [2021-03-10 22:01:28,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:28,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:28,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:28,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:28,499 INFO L87 Difference]: Start difference. First operand 366 states and 1145 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:28,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:28,752 INFO L93 Difference]: Finished difference Result 637 states and 1891 transitions. [2021-03-10 22:01:28,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:28,752 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:28,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:28,753 INFO L225 Difference]: With dead ends: 637 [2021-03-10 22:01:28,753 INFO L226 Difference]: Without dead ends: 637 [2021-03-10 22:01:28,754 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 291.5ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:28,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-03-10 22:01:28,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 359. [2021-03-10 22:01:28,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.14804469273743) internal successors, (1127), 358 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:28,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1127 transitions. [2021-03-10 22:01:28,758 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1127 transitions. Word has length 20 [2021-03-10 22:01:28,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:28,758 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 1127 transitions. [2021-03-10 22:01:28,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:28,758 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1127 transitions. [2021-03-10 22:01:28,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:28,759 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:28,759 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:28,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1813 [2021-03-10 22:01:28,959 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:28,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:28,960 INFO L82 PathProgramCache]: Analyzing trace with hash 278926109, now seen corresponding path program 183 times [2021-03-10 22:01:28,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:28,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834294262] [2021-03-10 22:01:28,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:29,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:29,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834294262] [2021-03-10 22:01:29,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019511938] [2021-03-10 22:01:29,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:29,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:01:29,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:29,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:29,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:29,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:29,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:29,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978508186] [2021-03-10 22:01:29,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:29,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:29,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:29,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:29,230 INFO L87 Difference]: Start difference. First operand 359 states and 1127 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:29,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:29,516 INFO L93 Difference]: Finished difference Result 600 states and 1809 transitions. [2021-03-10 22:01:29,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:29,516 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:29,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:29,517 INFO L225 Difference]: With dead ends: 600 [2021-03-10 22:01:29,517 INFO L226 Difference]: Without dead ends: 600 [2021-03-10 22:01:29,517 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 286.2ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:29,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-03-10 22:01:29,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 356. [2021-03-10 22:01:29,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.132394366197183) internal successors, (1112), 355 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:29,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1112 transitions. [2021-03-10 22:01:29,522 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1112 transitions. Word has length 20 [2021-03-10 22:01:29,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:29,522 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 1112 transitions. [2021-03-10 22:01:29,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:29,522 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1112 transitions. [2021-03-10 22:01:29,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:29,522 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:29,522 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:29,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1823,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:29,723 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:29,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:29,723 INFO L82 PathProgramCache]: Analyzing trace with hash -992679763, now seen corresponding path program 184 times [2021-03-10 22:01:29,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:29,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202202269] [2021-03-10 22:01:29,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:29,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:29,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202202269] [2021-03-10 22:01:29,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244921263] [2021-03-10 22:01:29,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:29,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:29,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:29,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:29,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:29,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:29,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:29,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946898835] [2021-03-10 22:01:29,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:29,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:29,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:29,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:29,978 INFO L87 Difference]: Start difference. First operand 356 states and 1112 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:30,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:30,500 INFO L93 Difference]: Finished difference Result 637 states and 1883 transitions. [2021-03-10 22:01:30,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:01:30,500 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:30,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:30,501 INFO L225 Difference]: With dead ends: 637 [2021-03-10 22:01:30,501 INFO L226 Difference]: Without dead ends: 631 [2021-03-10 22:01:30,501 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 508.2ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:01:30,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-03-10 22:01:30,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 366. [2021-03-10 22:01:30,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.1205479452054794) internal successors, (1139), 365 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:30,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1139 transitions. [2021-03-10 22:01:30,506 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1139 transitions. Word has length 20 [2021-03-10 22:01:30,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:30,506 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1139 transitions. [2021-03-10 22:01:30,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:30,506 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1139 transitions. [2021-03-10 22:01:30,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:30,507 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:30,507 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:30,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1834,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:30,707 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:30,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:30,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1386863607, now seen corresponding path program 185 times [2021-03-10 22:01:30,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:30,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663953521] [2021-03-10 22:01:30,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:30,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663953521] [2021-03-10 22:01:30,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270937297] [2021-03-10 22:01:30,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:30,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:01:30,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:30,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:30,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:30,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:30,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:30,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:30,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918802213] [2021-03-10 22:01:30,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:30,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:30,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:30,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:30,970 INFO L87 Difference]: Start difference. First operand 366 states and 1139 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:31,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:31,424 INFO L93 Difference]: Finished difference Result 614 states and 1844 transitions. [2021-03-10 22:01:31,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:01:31,424 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:31,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:31,425 INFO L225 Difference]: With dead ends: 614 [2021-03-10 22:01:31,425 INFO L226 Difference]: Without dead ends: 614 [2021-03-10 22:01:31,425 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 422.1ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:01:31,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-03-10 22:01:31,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 355. [2021-03-10 22:01:31,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.1271186440677967) internal successors, (1107), 354 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:31,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1107 transitions. [2021-03-10 22:01:31,430 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1107 transitions. Word has length 20 [2021-03-10 22:01:31,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:31,430 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1107 transitions. [2021-03-10 22:01:31,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:31,430 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1107 transitions. [2021-03-10 22:01:31,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:31,431 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:31,431 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:31,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1842 [2021-03-10 22:01:31,631 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:31,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:31,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1283429917, now seen corresponding path program 186 times [2021-03-10 22:01:31,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:31,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627871233] [2021-03-10 22:01:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:31,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627871233] [2021-03-10 22:01:31,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020280910] [2021-03-10 22:01:31,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:31,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:01:31,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:31,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:31,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:31,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:31,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:31,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139466058] [2021-03-10 22:01:31,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:31,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:31,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:31,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:31,882 INFO L87 Difference]: Start difference. First operand 355 states and 1107 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:32,148 INFO L93 Difference]: Finished difference Result 554 states and 1681 transitions. [2021-03-10 22:01:32,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:32,148 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:32,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:32,149 INFO L225 Difference]: With dead ends: 554 [2021-03-10 22:01:32,149 INFO L226 Difference]: Without dead ends: 542 [2021-03-10 22:01:32,149 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 278.4ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:32,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-03-10 22:01:32,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 357. [2021-03-10 22:01:32,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.1235955056179776) internal successors, (1112), 356 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1112 transitions. [2021-03-10 22:01:32,154 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1112 transitions. Word has length 20 [2021-03-10 22:01:32,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:32,154 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 1112 transitions. [2021-03-10 22:01:32,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:32,154 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1112 transitions. [2021-03-10 22:01:32,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:32,154 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:32,154 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:32,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1857,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:32,355 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:32,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:32,355 INFO L82 PathProgramCache]: Analyzing trace with hash 2034830355, now seen corresponding path program 187 times [2021-03-10 22:01:32,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:32,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714534723] [2021-03-10 22:01:32,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:32,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714534723] [2021-03-10 22:01:32,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915733654] [2021-03-10 22:01:32,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:32,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:32,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:32,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:32,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:32,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:32,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797770563] [2021-03-10 22:01:32,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:32,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:32,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:32,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:32,642 INFO L87 Difference]: Start difference. First operand 357 states and 1112 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:33,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:33,099 INFO L93 Difference]: Finished difference Result 579 states and 1733 transitions. [2021-03-10 22:01:33,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:01:33,099 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:33,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:33,100 INFO L225 Difference]: With dead ends: 579 [2021-03-10 22:01:33,100 INFO L226 Difference]: Without dead ends: 573 [2021-03-10 22:01:33,100 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 493.7ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:01:33,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-03-10 22:01:33,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 367. [2021-03-10 22:01:33,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.112021857923497) internal successors, (1139), 366 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:33,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1139 transitions. [2021-03-10 22:01:33,105 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1139 transitions. Word has length 20 [2021-03-10 22:01:33,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:33,105 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 1139 transitions. [2021-03-10 22:01:33,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:33,105 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1139 transitions. [2021-03-10 22:01:33,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:33,106 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:33,106 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:33,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1864 [2021-03-10 22:01:33,307 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:33,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:33,307 INFO L82 PathProgramCache]: Analyzing trace with hash 119406429, now seen corresponding path program 188 times [2021-03-10 22:01:33,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:33,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86270369] [2021-03-10 22:01:33,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:33,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86270369] [2021-03-10 22:01:33,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933602023] [2021-03-10 22:01:33,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:33,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:33,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:33,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:33,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:33,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:33,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:33,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613411675] [2021-03-10 22:01:33,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:33,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:33,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:33,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:33,590 INFO L87 Difference]: Start difference. First operand 367 states and 1139 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:33,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:33,839 INFO L93 Difference]: Finished difference Result 550 states and 1679 transitions. [2021-03-10 22:01:33,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:33,839 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:33,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:33,840 INFO L225 Difference]: With dead ends: 550 [2021-03-10 22:01:33,840 INFO L226 Difference]: Without dead ends: 550 [2021-03-10 22:01:33,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 300.9ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:33,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-03-10 22:01:33,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 354. [2021-03-10 22:01:33,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.121813031161473) internal successors, (1102), 353 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:33,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1102 transitions. [2021-03-10 22:01:33,844 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1102 transitions. Word has length 20 [2021-03-10 22:01:33,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:33,844 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 1102 transitions. [2021-03-10 22:01:33,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:33,844 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1102 transitions. [2021-03-10 22:01:33,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:33,845 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:33,845 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:34,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1872 [2021-03-10 22:01:34,060 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:34,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:34,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1789704275, now seen corresponding path program 189 times [2021-03-10 22:01:34,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:34,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767402098] [2021-03-10 22:01:34,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:34,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767402098] [2021-03-10 22:01:34,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999203931] [2021-03-10 22:01:34,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:34,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:01:34,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:34,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:34,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:34,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:34,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:34,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:34,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946155010] [2021-03-10 22:01:34,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:34,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:34,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:34,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:34,325 INFO L87 Difference]: Start difference. First operand 354 states and 1102 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:34,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:34,664 INFO L93 Difference]: Finished difference Result 646 states and 1895 transitions. [2021-03-10 22:01:34,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:34,665 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:34,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:34,665 INFO L225 Difference]: With dead ends: 646 [2021-03-10 22:01:34,665 INFO L226 Difference]: Without dead ends: 628 [2021-03-10 22:01:34,666 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 379.9ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:34,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-03-10 22:01:34,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 356. [2021-03-10 22:01:34,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.1183098591549294) internal successors, (1107), 355 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:34,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1107 transitions. [2021-03-10 22:01:34,670 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1107 transitions. Word has length 20 [2021-03-10 22:01:34,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:34,671 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 1107 transitions. [2021-03-10 22:01:34,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:34,671 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1107 transitions. [2021-03-10 22:01:34,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:34,671 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:34,671 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:34,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1881 [2021-03-10 22:01:34,886 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:34,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:34,887 INFO L82 PathProgramCache]: Analyzing trace with hash 222651827, now seen corresponding path program 190 times [2021-03-10 22:01:34,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:34,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630608372] [2021-03-10 22:01:34,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:34,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:34,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630608372] [2021-03-10 22:01:34,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39071390] [2021-03-10 22:01:34,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:35,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:35,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:35,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:35,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:35,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:35,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:35,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032952922] [2021-03-10 22:01:35,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:35,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:35,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:35,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:35,143 INFO L87 Difference]: Start difference. First operand 356 states and 1107 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:35,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:35,456 INFO L93 Difference]: Finished difference Result 607 states and 1816 transitions. [2021-03-10 22:01:35,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:35,456 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:35,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:35,457 INFO L225 Difference]: With dead ends: 607 [2021-03-10 22:01:35,457 INFO L226 Difference]: Without dead ends: 595 [2021-03-10 22:01:35,457 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 339.0ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:35,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-03-10 22:01:35,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 358. [2021-03-10 22:01:35,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.11484593837535) internal successors, (1112), 357 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:35,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1112 transitions. [2021-03-10 22:01:35,462 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1112 transitions. Word has length 20 [2021-03-10 22:01:35,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:35,462 INFO L480 AbstractCegarLoop]: Abstraction has 358 states and 1112 transitions. [2021-03-10 22:01:35,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:35,462 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1112 transitions. [2021-03-10 22:01:35,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:35,462 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:35,462 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:35,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1890,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:35,663 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:35,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:35,663 INFO L82 PathProgramCache]: Analyzing trace with hash 974052265, now seen corresponding path program 191 times [2021-03-10 22:01:35,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:35,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415603736] [2021-03-10 22:01:35,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:35,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415603736] [2021-03-10 22:01:35,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715626391] [2021-03-10 22:01:35,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:35,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:35,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:35,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:35,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:35,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:35,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:35,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874158128] [2021-03-10 22:01:35,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:35,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:35,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:35,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:35,914 INFO L87 Difference]: Start difference. First operand 358 states and 1112 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:36,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:36,372 INFO L93 Difference]: Finished difference Result 632 states and 1868 transitions. [2021-03-10 22:01:36,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:01:36,372 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:36,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:36,373 INFO L225 Difference]: With dead ends: 632 [2021-03-10 22:01:36,373 INFO L226 Difference]: Without dead ends: 626 [2021-03-10 22:01:36,373 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 487.7ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:01:36,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-03-10 22:01:36,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 368. [2021-03-10 22:01:36,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.103542234332425) internal successors, (1139), 367 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:36,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1139 transitions. [2021-03-10 22:01:36,378 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1139 transitions. Word has length 20 [2021-03-10 22:01:36,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:36,378 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 1139 transitions. [2021-03-10 22:01:36,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:36,378 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1139 transitions. [2021-03-10 22:01:36,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:36,378 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:36,378 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:36,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1901,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:36,579 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:36,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:36,579 INFO L82 PathProgramCache]: Analyzing trace with hash -941371661, now seen corresponding path program 192 times [2021-03-10 22:01:36,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:36,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837231327] [2021-03-10 22:01:36,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:36,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837231327] [2021-03-10 22:01:36,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191302177] [2021-03-10 22:01:36,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:36,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:01:36,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:36,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:36,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:36,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:36,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:36,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189932670] [2021-03-10 22:01:36,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:36,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:36,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:36,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:36,834 INFO L87 Difference]: Start difference. First operand 368 states and 1139 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:37,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:37,144 INFO L93 Difference]: Finished difference Result 603 states and 1814 transitions. [2021-03-10 22:01:37,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:37,145 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:37,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:37,146 INFO L225 Difference]: With dead ends: 603 [2021-03-10 22:01:37,146 INFO L226 Difference]: Without dead ends: 603 [2021-03-10 22:01:37,146 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 344.9ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:37,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-03-10 22:01:37,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 353. [2021-03-10 22:01:37,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.116477272727273) internal successors, (1097), 352 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:37,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1097 transitions. [2021-03-10 22:01:37,150 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1097 transitions. Word has length 20 [2021-03-10 22:01:37,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:37,150 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 1097 transitions. [2021-03-10 22:01:37,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:37,151 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1097 transitions. [2021-03-10 22:01:37,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:37,151 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:37,151 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:37,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1908 [2021-03-10 22:01:37,352 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:37,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:37,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1839029821, now seen corresponding path program 193 times [2021-03-10 22:01:37,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:37,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117074528] [2021-03-10 22:01:37,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:37,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117074528] [2021-03-10 22:01:37,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141437003] [2021-03-10 22:01:37,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:37,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:37,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:37,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:37,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:37,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:37,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769518228] [2021-03-10 22:01:37,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:37,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:37,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:37,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:37,608 INFO L87 Difference]: Start difference. First operand 353 states and 1097 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:37,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:37,812 INFO L93 Difference]: Finished difference Result 457 states and 1370 transitions. [2021-03-10 22:01:37,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:37,812 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:37,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:37,813 INFO L225 Difference]: With dead ends: 457 [2021-03-10 22:01:37,813 INFO L226 Difference]: Without dead ends: 457 [2021-03-10 22:01:37,813 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 242.5ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:37,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-03-10 22:01:37,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 361. [2021-03-10 22:01:37,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 3.1333333333333333) internal successors, (1128), 360 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:37,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1128 transitions. [2021-03-10 22:01:37,817 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1128 transitions. Word has length 20 [2021-03-10 22:01:37,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:37,817 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 1128 transitions. [2021-03-10 22:01:37,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:37,817 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1128 transitions. [2021-03-10 22:01:37,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:37,818 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:37,818 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:38,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1919 [2021-03-10 22:01:38,018 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:38,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:38,019 INFO L82 PathProgramCache]: Analyzing trace with hash 962029753, now seen corresponding path program 194 times [2021-03-10 22:01:38,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:38,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046645936] [2021-03-10 22:01:38,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:38,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046645936] [2021-03-10 22:01:38,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274650560] [2021-03-10 22:01:38,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:38,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:38,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:38,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:38,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:38,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:38,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:38,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618640183] [2021-03-10 22:01:38,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:38,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:38,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:38,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:38,266 INFO L87 Difference]: Start difference. First operand 361 states and 1128 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:38,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:38,521 INFO L93 Difference]: Finished difference Result 463 states and 1377 transitions. [2021-03-10 22:01:38,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:01:38,521 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:38,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:38,522 INFO L225 Difference]: With dead ends: 463 [2021-03-10 22:01:38,522 INFO L226 Difference]: Without dead ends: 457 [2021-03-10 22:01:38,522 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 254.7ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:38,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-03-10 22:01:38,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 358. [2021-03-10 22:01:38,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.1288515406162465) internal successors, (1117), 357 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:38,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1117 transitions. [2021-03-10 22:01:38,526 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1117 transitions. Word has length 20 [2021-03-10 22:01:38,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:38,526 INFO L480 AbstractCegarLoop]: Abstraction has 358 states and 1117 transitions. [2021-03-10 22:01:38,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:38,526 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1117 transitions. [2021-03-10 22:01:38,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:38,527 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:38,527 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:38,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1927 [2021-03-10 22:01:38,727 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:38,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:38,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1499885331, now seen corresponding path program 195 times [2021-03-10 22:01:38,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:38,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353367342] [2021-03-10 22:01:38,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:38,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353367342] [2021-03-10 22:01:38,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008777816] [2021-03-10 22:01:38,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:38,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:01:38,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:38,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:38,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:38,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:38,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:38,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515676383] [2021-03-10 22:01:38,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:38,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:38,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:38,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:38,979 INFO L87 Difference]: Start difference. First operand 358 states and 1117 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:39,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:39,246 INFO L93 Difference]: Finished difference Result 427 states and 1295 transitions. [2021-03-10 22:01:39,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:39,247 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:39,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:39,247 INFO L225 Difference]: With dead ends: 427 [2021-03-10 22:01:39,247 INFO L226 Difference]: Without dead ends: 415 [2021-03-10 22:01:39,247 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 305.1ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:39,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-03-10 22:01:39,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 355. [2021-03-10 22:01:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.1242937853107344) internal successors, (1106), 354 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:39,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1106 transitions. [2021-03-10 22:01:39,251 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1106 transitions. Word has length 20 [2021-03-10 22:01:39,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:39,251 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1106 transitions. [2021-03-10 22:01:39,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:39,252 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1106 transitions. [2021-03-10 22:01:39,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:39,252 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:39,252 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:39,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1934,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:39,453 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:39,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:39,453 INFO L82 PathProgramCache]: Analyzing trace with hash -20452723, now seen corresponding path program 196 times [2021-03-10 22:01:39,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:39,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305523771] [2021-03-10 22:01:39,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:39,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305523771] [2021-03-10 22:01:39,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880144109] [2021-03-10 22:01:39,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:39,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:39,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:39,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:39,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:39,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:39,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:39,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31761846] [2021-03-10 22:01:39,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:39,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:39,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:39,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:39,690 INFO L87 Difference]: Start difference. First operand 355 states and 1106 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:39,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:39,981 INFO L93 Difference]: Finished difference Result 544 states and 1588 transitions. [2021-03-10 22:01:39,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:01:39,982 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:39,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:39,982 INFO L225 Difference]: With dead ends: 544 [2021-03-10 22:01:39,982 INFO L226 Difference]: Without dead ends: 544 [2021-03-10 22:01:39,983 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 268.8ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:01:39,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-03-10 22:01:39,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 363. [2021-03-10 22:01:39,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.154696132596685) internal successors, (1142), 362 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:39,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1142 transitions. [2021-03-10 22:01:39,992 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1142 transitions. Word has length 20 [2021-03-10 22:01:39,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:39,993 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 1142 transitions. [2021-03-10 22:01:39,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:39,993 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1142 transitions. [2021-03-10 22:01:39,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:39,993 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:39,993 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:40,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1944,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:40,194 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:40,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:40,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1514360445, now seen corresponding path program 197 times [2021-03-10 22:01:40,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:40,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748542484] [2021-03-10 22:01:40,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:40,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748542484] [2021-03-10 22:01:40,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030218092] [2021-03-10 22:01:40,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:40,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:40,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:40,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:40,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:40,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:40,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:40,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:40,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103816345] [2021-03-10 22:01:40,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:40,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:40,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:40,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:40,428 INFO L87 Difference]: Start difference. First operand 363 states and 1142 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:40,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:40,742 INFO L93 Difference]: Finished difference Result 550 states and 1589 transitions. [2021-03-10 22:01:40,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:01:40,743 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:40,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:40,744 INFO L225 Difference]: With dead ends: 550 [2021-03-10 22:01:40,744 INFO L226 Difference]: Without dead ends: 544 [2021-03-10 22:01:40,744 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 283.4ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:01:40,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-03-10 22:01:40,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 366. [2021-03-10 22:01:40,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.1342465753424658) internal successors, (1144), 365 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:40,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1144 transitions. [2021-03-10 22:01:40,748 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1144 transitions. Word has length 20 [2021-03-10 22:01:40,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:40,748 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1144 transitions. [2021-03-10 22:01:40,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:40,748 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1144 transitions. [2021-03-10 22:01:40,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:40,749 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:40,749 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:40,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1951 [2021-03-10 22:01:40,949 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:40,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:40,950 INFO L82 PathProgramCache]: Analyzing trace with hash 730947715, now seen corresponding path program 198 times [2021-03-10 22:01:40,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:40,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038160813] [2021-03-10 22:01:40,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:41,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038160813] [2021-03-10 22:01:41,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776637099] [2021-03-10 22:01:41,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:41,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:01:41,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:41,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:41,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:41,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:41,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:41,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100400215] [2021-03-10 22:01:41,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:41,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:41,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:41,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:41,222 INFO L87 Difference]: Start difference. First operand 366 states and 1144 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:41,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:41,422 INFO L93 Difference]: Finished difference Result 512 states and 1509 transitions. [2021-03-10 22:01:41,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:41,423 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:41,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:41,424 INFO L225 Difference]: With dead ends: 512 [2021-03-10 22:01:41,424 INFO L226 Difference]: Without dead ends: 512 [2021-03-10 22:01:41,424 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 216.1ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:41,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-03-10 22:01:41,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 359. [2021-03-10 22:01:41,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.1452513966480447) internal successors, (1126), 358 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:41,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1126 transitions. [2021-03-10 22:01:41,428 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1126 transitions. Word has length 20 [2021-03-10 22:01:41,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:41,428 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 1126 transitions. [2021-03-10 22:01:41,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:41,428 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1126 transitions. [2021-03-10 22:01:41,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:41,429 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:41,429 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:41,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1958,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:41,629 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:41,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:41,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2023290115, now seen corresponding path program 199 times [2021-03-10 22:01:41,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:41,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358481169] [2021-03-10 22:01:41,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:41,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:41,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358481169] [2021-03-10 22:01:41,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344168112] [2021-03-10 22:01:41,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:41,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:41,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:41,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:41,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:41,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664671211] [2021-03-10 22:01:41,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:41,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:41,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:41,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:41,915 INFO L87 Difference]: Start difference. First operand 359 states and 1126 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:42,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:42,098 INFO L93 Difference]: Finished difference Result 475 states and 1427 transitions. [2021-03-10 22:01:42,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:42,098 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:42,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:42,099 INFO L225 Difference]: With dead ends: 475 [2021-03-10 22:01:42,099 INFO L226 Difference]: Without dead ends: 475 [2021-03-10 22:01:42,099 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 228.9ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:42,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-03-10 22:01:42,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 356. [2021-03-10 22:01:42,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.129577464788732) internal successors, (1111), 355 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:42,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1111 transitions. [2021-03-10 22:01:42,103 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1111 transitions. Word has length 20 [2021-03-10 22:01:42,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:42,103 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 1111 transitions. [2021-03-10 22:01:42,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:42,103 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1111 transitions. [2021-03-10 22:01:42,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:42,104 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:42,104 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:42,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1968,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:42,304 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:42,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:42,304 INFO L82 PathProgramCache]: Analyzing trace with hash 751684243, now seen corresponding path program 200 times [2021-03-10 22:01:42,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:42,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245333347] [2021-03-10 22:01:42,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:42,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245333347] [2021-03-10 22:01:42,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80214660] [2021-03-10 22:01:42,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:42,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:42,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:42,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:42,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:42,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:42,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:42,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214398843] [2021-03-10 22:01:42,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:42,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:42,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:42,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:42,577 INFO L87 Difference]: Start difference. First operand 356 states and 1111 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:42,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:42,858 INFO L93 Difference]: Finished difference Result 512 states and 1501 transitions. [2021-03-10 22:01:42,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:01:42,859 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:42,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:42,859 INFO L225 Difference]: With dead ends: 512 [2021-03-10 22:01:42,859 INFO L226 Difference]: Without dead ends: 506 [2021-03-10 22:01:42,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 316.2ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:01:42,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-03-10 22:01:42,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 366. [2021-03-10 22:01:42,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.117808219178082) internal successors, (1138), 365 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:42,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1138 transitions. [2021-03-10 22:01:42,864 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1138 transitions. Word has length 20 [2021-03-10 22:01:42,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:42,864 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1138 transitions. [2021-03-10 22:01:42,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:42,864 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1138 transitions. [2021-03-10 22:01:42,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:42,865 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:42,865 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:43,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1978,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:43,065 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:43,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:43,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1163739683, now seen corresponding path program 201 times [2021-03-10 22:01:43,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:43,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054094042] [2021-03-10 22:01:43,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:43,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054094042] [2021-03-10 22:01:43,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708555750] [2021-03-10 22:01:43,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:43,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:01:43,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:43,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:43,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:43,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:43,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:43,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978258665] [2021-03-10 22:01:43,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:43,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:43,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:43,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:43,308 INFO L87 Difference]: Start difference. First operand 366 states and 1138 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:43,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:43,564 INFO L93 Difference]: Finished difference Result 489 states and 1462 transitions. [2021-03-10 22:01:43,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:01:43,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:43,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:43,565 INFO L225 Difference]: With dead ends: 489 [2021-03-10 22:01:43,565 INFO L226 Difference]: Without dead ends: 489 [2021-03-10 22:01:43,565 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 260.6ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:01:43,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-03-10 22:01:43,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 355. [2021-03-10 22:01:43,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.1242937853107344) internal successors, (1106), 354 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:43,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1106 transitions. [2021-03-10 22:01:43,570 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1106 transitions. Word has length 20 [2021-03-10 22:01:43,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:43,570 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1106 transitions. [2021-03-10 22:01:43,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:43,570 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1106 transitions. [2021-03-10 22:01:43,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:43,570 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:43,570 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:43,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1991 [2021-03-10 22:01:43,771 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:43,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:43,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1267173373, now seen corresponding path program 202 times [2021-03-10 22:01:43,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:43,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168623701] [2021-03-10 22:01:43,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:43,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168623701] [2021-03-10 22:01:43,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756410996] [2021-03-10 22:01:43,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:43,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:43,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:43,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:43,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:44,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:44,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:44,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298887311] [2021-03-10 22:01:44,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:44,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:44,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:44,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:44,012 INFO L87 Difference]: Start difference. First operand 355 states and 1106 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:44,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:44,262 INFO L93 Difference]: Finished difference Result 429 states and 1299 transitions. [2021-03-10 22:01:44,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:44,262 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:44,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:44,263 INFO L225 Difference]: With dead ends: 429 [2021-03-10 22:01:44,263 INFO L226 Difference]: Without dead ends: 417 [2021-03-10 22:01:44,263 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 289.4ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:44,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-03-10 22:01:44,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 357. [2021-03-10 22:01:44,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.1207865168539324) internal successors, (1111), 356 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:44,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1111 transitions. [2021-03-10 22:01:44,267 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1111 transitions. Word has length 20 [2021-03-10 22:01:44,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:44,267 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 1111 transitions. [2021-03-10 22:01:44,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:44,268 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1111 transitions. [2021-03-10 22:01:44,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:44,268 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:44,268 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:44,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2001,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:44,469 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:44,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:44,469 INFO L82 PathProgramCache]: Analyzing trace with hash -515772935, now seen corresponding path program 203 times [2021-03-10 22:01:44,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:44,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294800585] [2021-03-10 22:01:44,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:44,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:44,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294800585] [2021-03-10 22:01:44,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267444352] [2021-03-10 22:01:44,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:44,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:44,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:44,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:44,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:44,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:44,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:44,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:44,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208962120] [2021-03-10 22:01:44,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:44,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:44,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:44,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:44,729 INFO L87 Difference]: Start difference. First operand 357 states and 1111 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:44,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:44,989 INFO L93 Difference]: Finished difference Result 454 states and 1351 transitions. [2021-03-10 22:01:44,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:01:44,989 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:44,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:44,990 INFO L225 Difference]: With dead ends: 454 [2021-03-10 22:01:44,990 INFO L226 Difference]: Without dead ends: 448 [2021-03-10 22:01:44,990 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 284.7ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:01:44,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-03-10 22:01:44,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 367. [2021-03-10 22:01:44,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.109289617486339) internal successors, (1138), 366 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:44,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1138 transitions. [2021-03-10 22:01:44,994 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1138 transitions. Word has length 20 [2021-03-10 22:01:44,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:44,995 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 1138 transitions. [2021-03-10 22:01:44,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:44,995 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1138 transitions. [2021-03-10 22:01:44,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:44,995 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:44,995 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:45,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2008,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:45,196 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:45,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:45,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1863770435, now seen corresponding path program 204 times [2021-03-10 22:01:45,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:45,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242139485] [2021-03-10 22:01:45,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:45,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:45,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242139485] [2021-03-10 22:01:45,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982896814] [2021-03-10 22:01:45,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:45,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:01:45,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:45,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:45,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:45,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:45,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:45,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229534380] [2021-03-10 22:01:45,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:45,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:45,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:45,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:45,463 INFO L87 Difference]: Start difference. First operand 367 states and 1138 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:45,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:45,653 INFO L93 Difference]: Finished difference Result 425 states and 1297 transitions. [2021-03-10 22:01:45,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:45,654 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:45,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:45,654 INFO L225 Difference]: With dead ends: 425 [2021-03-10 22:01:45,655 INFO L226 Difference]: Without dead ends: 425 [2021-03-10 22:01:45,655 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 256.3ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:45,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-03-10 22:01:45,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 354. [2021-03-10 22:01:45,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.1189801699716715) internal successors, (1101), 353 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:45,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1101 transitions. [2021-03-10 22:01:45,658 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1101 transitions. Word has length 20 [2021-03-10 22:01:45,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:45,659 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 1101 transitions. [2021-03-10 22:01:45,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:45,659 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1101 transitions. [2021-03-10 22:01:45,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:45,659 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:45,659 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:45,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2019 [2021-03-10 22:01:45,860 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:45,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:45,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1081230813, now seen corresponding path program 205 times [2021-03-10 22:01:45,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:45,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457822663] [2021-03-10 22:01:45,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:45,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457822663] [2021-03-10 22:01:45,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171328355] [2021-03-10 22:01:45,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:45,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:45,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:46,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:46,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:46,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831243488] [2021-03-10 22:01:46,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:46,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:46,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:46,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:46,109 INFO L87 Difference]: Start difference. First operand 354 states and 1101 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:46,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:46,338 INFO L93 Difference]: Finished difference Result 499 states and 1490 transitions. [2021-03-10 22:01:46,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:46,338 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:46,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:46,339 INFO L225 Difference]: With dead ends: 499 [2021-03-10 22:01:46,339 INFO L226 Difference]: Without dead ends: 499 [2021-03-10 22:01:46,339 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 248.6ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:46,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-03-10 22:01:46,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 364. [2021-03-10 22:01:46,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 3.15702479338843) internal successors, (1146), 363 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:46,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1146 transitions. [2021-03-10 22:01:46,343 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1146 transitions. Word has length 20 [2021-03-10 22:01:46,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:46,343 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 1146 transitions. [2021-03-10 22:01:46,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:46,343 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1146 transitions. [2021-03-10 22:01:46,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:46,344 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:46,344 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:46,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2029,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:46,544 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:46,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:46,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1719828761, now seen corresponding path program 206 times [2021-03-10 22:01:46,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:46,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211076542] [2021-03-10 22:01:46,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:46,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:46,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211076542] [2021-03-10 22:01:46,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461325147] [2021-03-10 22:01:46,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:46,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:46,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:46,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:46,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:46,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:46,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:46,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043677054] [2021-03-10 22:01:46,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:46,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:46,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:46,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:46,785 INFO L87 Difference]: Start difference. First operand 364 states and 1146 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:47,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:47,018 INFO L93 Difference]: Finished difference Result 505 states and 1491 transitions. [2021-03-10 22:01:47,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:47,018 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:47,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:47,019 INFO L225 Difference]: With dead ends: 505 [2021-03-10 22:01:47,019 INFO L226 Difference]: Without dead ends: 499 [2021-03-10 22:01:47,019 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 253.9ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:47,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-03-10 22:01:47,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 367. [2021-03-10 22:01:47,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.1366120218579234) internal successors, (1148), 366 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:47,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1148 transitions. [2021-03-10 22:01:47,023 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1148 transitions. Word has length 20 [2021-03-10 22:01:47,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:47,023 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 1148 transitions. [2021-03-10 22:01:47,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:47,023 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1148 transitions. [2021-03-10 22:01:47,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:47,024 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:47,024 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:47,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2039 [2021-03-10 22:01:47,224 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:47,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:47,225 INFO L82 PathProgramCache]: Analyzing trace with hash -329830375, now seen corresponding path program 207 times [2021-03-10 22:01:47,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:47,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168123834] [2021-03-10 22:01:47,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:47,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168123834] [2021-03-10 22:01:47,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474430488] [2021-03-10 22:01:47,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:47,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:01:47,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:47,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:47,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:47,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:47,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:47,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719524442] [2021-03-10 22:01:47,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:47,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:47,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:47,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:47,479 INFO L87 Difference]: Start difference. First operand 367 states and 1148 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:47,755 INFO L93 Difference]: Finished difference Result 557 states and 1633 transitions. [2021-03-10 22:01:47,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:47,755 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:47,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:47,756 INFO L225 Difference]: With dead ends: 557 [2021-03-10 22:01:47,756 INFO L226 Difference]: Without dead ends: 557 [2021-03-10 22:01:47,756 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 247.8ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:47,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-03-10 22:01:47,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 370. [2021-03-10 22:01:47,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.151761517615176) internal successors, (1163), 369 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:47,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1163 transitions. [2021-03-10 22:01:47,760 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1163 transitions. Word has length 20 [2021-03-10 22:01:47,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:47,760 INFO L480 AbstractCegarLoop]: Abstraction has 370 states and 1163 transitions. [2021-03-10 22:01:47,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:47,761 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1163 transitions. [2021-03-10 22:01:47,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:47,761 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:47,761 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:47,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2048 [2021-03-10 22:01:47,962 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:47,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:47,962 INFO L82 PathProgramCache]: Analyzing trace with hash 962512025, now seen corresponding path program 208 times [2021-03-10 22:01:47,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:47,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206775382] [2021-03-10 22:01:47,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:48,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206775382] [2021-03-10 22:01:48,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701792444] [2021-03-10 22:01:48,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:48,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:48,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:48,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:48,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:48,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:48,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:48,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:48,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810551672] [2021-03-10 22:01:48,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:48,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:48,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:48,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:48,210 INFO L87 Difference]: Start difference. First operand 370 states and 1163 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:48,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:48,473 INFO L93 Difference]: Finished difference Result 520 states and 1551 transitions. [2021-03-10 22:01:48,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:48,474 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:48,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:48,475 INFO L225 Difference]: With dead ends: 520 [2021-03-10 22:01:48,475 INFO L226 Difference]: Without dead ends: 520 [2021-03-10 22:01:48,475 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 244.9ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:48,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-03-10 22:01:48,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 367. [2021-03-10 22:01:48,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.1366120218579234) internal successors, (1148), 366 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:48,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1148 transitions. [2021-03-10 22:01:48,479 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1148 transitions. Word has length 20 [2021-03-10 22:01:48,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:48,479 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 1148 transitions. [2021-03-10 22:01:48,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:48,479 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1148 transitions. [2021-03-10 22:01:48,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:48,480 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:48,480 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:48,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2057 [2021-03-10 22:01:48,680 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:48,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:48,681 INFO L82 PathProgramCache]: Analyzing trace with hash -309093847, now seen corresponding path program 209 times [2021-03-10 22:01:48,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:48,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263183318] [2021-03-10 22:01:48,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:48,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263183318] [2021-03-10 22:01:48,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860564726] [2021-03-10 22:01:48,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:48,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:01:48,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:48,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:48,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:48,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:48,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:48,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:48,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571517793] [2021-03-10 22:01:48,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:48,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:48,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:48,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:48,930 INFO L87 Difference]: Start difference. First operand 367 states and 1148 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:49,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:49,174 INFO L93 Difference]: Finished difference Result 545 states and 1585 transitions. [2021-03-10 22:01:49,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:49,174 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:49,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:49,175 INFO L225 Difference]: With dead ends: 545 [2021-03-10 22:01:49,175 INFO L226 Difference]: Without dead ends: 539 [2021-03-10 22:01:49,175 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 257.4ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:49,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-03-10 22:01:49,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 371. [2021-03-10 22:01:49,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.1405405405405404) internal successors, (1162), 370 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:49,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1162 transitions. [2021-03-10 22:01:49,180 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1162 transitions. Word has length 20 [2021-03-10 22:01:49,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:49,180 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 1162 transitions. [2021-03-10 22:01:49,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:49,180 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1162 transitions. [2021-03-10 22:01:49,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:49,180 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:49,180 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:49,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2069 [2021-03-10 22:01:49,381 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:49,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:49,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2070449523, now seen corresponding path program 210 times [2021-03-10 22:01:49,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:49,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060248801] [2021-03-10 22:01:49,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:49,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:49,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060248801] [2021-03-10 22:01:49,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652684865] [2021-03-10 22:01:49,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:49,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:01:49,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:49,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:01:49,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:49,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:01:49,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:49,577 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:49,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:49,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:01:49,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:49,583 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:49,583 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:49,585 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:49,586 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:49,588 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:49,589 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:49,591 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:49,592 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:49,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:49,596 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:49,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:01:49,600 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:49,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:01:49,603 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:49,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:49,607 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:49,653 INFO L628 ElimStorePlain]: treesize reduction 21, result has 70.0 percent of original size [2021-03-10 22:01:49,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:01:49,654 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:252, output treesize:49 [2021-03-10 22:01:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:49,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:49,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:01:49,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522926684] [2021-03-10 22:01:49,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:01:49,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:49,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:01:49,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:01:49,749 INFO L87 Difference]: Start difference. First operand 371 states and 1162 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:50,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:50,220 INFO L93 Difference]: Finished difference Result 551 states and 1606 transitions. [2021-03-10 22:01:50,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:01:50,220 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:50,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:50,221 INFO L225 Difference]: With dead ends: 551 [2021-03-10 22:01:50,221 INFO L226 Difference]: Without dead ends: 551 [2021-03-10 22:01:50,221 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 459.4ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:01:50,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-03-10 22:01:50,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 368. [2021-03-10 22:01:50,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.138964577656676) internal successors, (1152), 367 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:50,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1152 transitions. [2021-03-10 22:01:50,226 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1152 transitions. Word has length 20 [2021-03-10 22:01:50,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:50,226 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 1152 transitions. [2021-03-10 22:01:50,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:50,226 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1152 transitions. [2021-03-10 22:01:50,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:50,227 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:50,227 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:50,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2078,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:50,427 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:50,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:50,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1852708291, now seen corresponding path program 211 times [2021-03-10 22:01:50,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:50,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761829010] [2021-03-10 22:01:50,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:50,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761829010] [2021-03-10 22:01:50,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992356550] [2021-03-10 22:01:50,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:50,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:50,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:50,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:50,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:50,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:50,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710998056] [2021-03-10 22:01:50,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:50,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:50,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:50,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:50,660 INFO L87 Difference]: Start difference. First operand 368 states and 1152 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:50,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:50,884 INFO L93 Difference]: Finished difference Result 481 states and 1451 transitions. [2021-03-10 22:01:50,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:50,884 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:50,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:50,885 INFO L225 Difference]: With dead ends: 481 [2021-03-10 22:01:50,885 INFO L226 Difference]: Without dead ends: 481 [2021-03-10 22:01:50,885 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 261.9ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:50,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-03-10 22:01:50,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 369. [2021-03-10 22:01:50,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.135869565217391) internal successors, (1154), 368 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:50,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1154 transitions. [2021-03-10 22:01:50,890 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1154 transitions. Word has length 20 [2021-03-10 22:01:50,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:50,890 INFO L480 AbstractCegarLoop]: Abstraction has 369 states and 1154 transitions. [2021-03-10 22:01:50,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:50,890 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1154 transitions. [2021-03-10 22:01:50,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:50,890 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:50,890 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:51,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2091 [2021-03-10 22:01:51,091 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:51,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:51,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1149916605, now seen corresponding path program 212 times [2021-03-10 22:01:51,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:51,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994872798] [2021-03-10 22:01:51,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:51,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:51,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994872798] [2021-03-10 22:01:51,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163872125] [2021-03-10 22:01:51,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:51,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:51,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:51,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:51,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:51,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:51,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:51,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861328757] [2021-03-10 22:01:51,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:51,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:51,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:51,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:51,326 INFO L87 Difference]: Start difference. First operand 369 states and 1154 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:51,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:51,587 INFO L93 Difference]: Finished difference Result 469 states and 1418 transitions. [2021-03-10 22:01:51,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:51,587 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:51,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:51,588 INFO L225 Difference]: With dead ends: 469 [2021-03-10 22:01:51,588 INFO L226 Difference]: Without dead ends: 469 [2021-03-10 22:01:51,588 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 267.3ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:51,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-03-10 22:01:51,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 358. [2021-03-10 22:01:51,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.1288515406162465) internal successors, (1117), 357 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:51,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1117 transitions. [2021-03-10 22:01:51,593 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1117 transitions. Word has length 20 [2021-03-10 22:01:51,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:51,593 INFO L480 AbstractCegarLoop]: Abstraction has 358 states and 1117 transitions. [2021-03-10 22:01:51,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:51,593 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1117 transitions. [2021-03-10 22:01:51,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:51,593 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:51,593 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:51,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2098,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:51,809 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:51,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:51,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1249185655, now seen corresponding path program 213 times [2021-03-10 22:01:51,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:51,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135586948] [2021-03-10 22:01:51,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:51,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135586948] [2021-03-10 22:01:51,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871508041] [2021-03-10 22:01:51,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:51,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:01:51,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:51,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:51,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:52,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:52,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:52,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261817740] [2021-03-10 22:01:52,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:52,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:52,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:52,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:52,054 INFO L87 Difference]: Start difference. First operand 358 states and 1117 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:52,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:52,362 INFO L93 Difference]: Finished difference Result 424 states and 1296 transitions. [2021-03-10 22:01:52,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:52,362 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:52,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:52,363 INFO L225 Difference]: With dead ends: 424 [2021-03-10 22:01:52,363 INFO L226 Difference]: Without dead ends: 424 [2021-03-10 22:01:52,363 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 312.3ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:52,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-03-10 22:01:52,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 355. [2021-03-10 22:01:52,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.121468926553672) internal successors, (1105), 354 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:52,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1105 transitions. [2021-03-10 22:01:52,367 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1105 transitions. Word has length 20 [2021-03-10 22:01:52,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:52,367 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1105 transitions. [2021-03-10 22:01:52,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:52,368 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1105 transitions. [2021-03-10 22:01:52,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:52,368 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:52,368 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:52,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2109 [2021-03-10 22:01:52,583 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:52,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:52,583 INFO L82 PathProgramCache]: Analyzing trace with hash 605987641, now seen corresponding path program 214 times [2021-03-10 22:01:52,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:52,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557420543] [2021-03-10 22:01:52,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:52,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:52,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557420543] [2021-03-10 22:01:52,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121928316] [2021-03-10 22:01:52,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:52,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:52,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:52,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:52,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:52,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:52,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:52,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989886911] [2021-03-10 22:01:52,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:52,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:52,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:52,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:52,833 INFO L87 Difference]: Start difference. First operand 355 states and 1105 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:53,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:53,081 INFO L93 Difference]: Finished difference Result 469 states and 1390 transitions. [2021-03-10 22:01:53,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:53,081 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:53,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:53,082 INFO L225 Difference]: With dead ends: 469 [2021-03-10 22:01:53,082 INFO L226 Difference]: Without dead ends: 463 [2021-03-10 22:01:53,082 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 285.5ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:53,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-03-10 22:01:53,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 369. [2021-03-10 22:01:53,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.108695652173913) internal successors, (1144), 368 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:53,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1144 transitions. [2021-03-10 22:01:53,086 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1144 transitions. Word has length 20 [2021-03-10 22:01:53,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:53,086 INFO L480 AbstractCegarLoop]: Abstraction has 369 states and 1144 transitions. [2021-03-10 22:01:53,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:53,086 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1144 transitions. [2021-03-10 22:01:53,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:53,087 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:53,087 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:53,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2116 [2021-03-10 22:01:53,287 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:53,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:53,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1309436285, now seen corresponding path program 215 times [2021-03-10 22:01:53,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:53,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610674976] [2021-03-10 22:01:53,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:53,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610674976] [2021-03-10 22:01:53,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621197345] [2021-03-10 22:01:53,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:53,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:01:53,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:53,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:53,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:53,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:53,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:01:53,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837866621] [2021-03-10 22:01:53,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:01:53,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:53,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:01:53,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:01:53,546 INFO L87 Difference]: Start difference. First operand 369 states and 1144 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:53,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:53,787 INFO L93 Difference]: Finished difference Result 475 states and 1411 transitions. [2021-03-10 22:01:53,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:01:53,788 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:53,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:53,788 INFO L225 Difference]: With dead ends: 475 [2021-03-10 22:01:53,788 INFO L226 Difference]: Without dead ends: 475 [2021-03-10 22:01:53,789 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 288.5ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:53,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-03-10 22:01:53,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 367. [2021-03-10 22:01:53,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.112021857923497) internal successors, (1139), 366 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1139 transitions. [2021-03-10 22:01:53,793 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1139 transitions. Word has length 20 [2021-03-10 22:01:53,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:53,793 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 1139 transitions. [2021-03-10 22:01:53,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:53,793 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1139 transitions. [2021-03-10 22:01:53,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:53,794 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:53,794 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:53,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2127,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:53,994 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:53,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:53,995 INFO L82 PathProgramCache]: Analyzing trace with hash -269200487, now seen corresponding path program 216 times [2021-03-10 22:01:53,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:53,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339858839] [2021-03-10 22:01:53,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:54,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339858839] [2021-03-10 22:01:54,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499257170] [2021-03-10 22:01:54,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:54,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:01:54,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:54,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:54,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:54,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:54,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:54,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:54,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704734115] [2021-03-10 22:01:54,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:54,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:54,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:54,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:54,226 INFO L87 Difference]: Start difference. First operand 367 states and 1139 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:54,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:54,526 INFO L93 Difference]: Finished difference Result 444 states and 1346 transitions. [2021-03-10 22:01:54,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:54,527 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:54,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:54,527 INFO L225 Difference]: With dead ends: 444 [2021-03-10 22:01:54,527 INFO L226 Difference]: Without dead ends: 444 [2021-03-10 22:01:54,528 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 304.9ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:54,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-03-10 22:01:54,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 354. [2021-03-10 22:01:54,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.1189801699716715) internal successors, (1101), 353 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:54,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1101 transitions. [2021-03-10 22:01:54,532 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1101 transitions. Word has length 20 [2021-03-10 22:01:54,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:54,532 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 1101 transitions. [2021-03-10 22:01:54,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:54,532 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1101 transitions. [2021-03-10 22:01:54,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:54,532 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:54,532 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:54,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2135 [2021-03-10 22:01:54,743 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:54,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:54,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1330548979, now seen corresponding path program 217 times [2021-03-10 22:01:54,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:54,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708445889] [2021-03-10 22:01:54,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:54,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:54,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708445889] [2021-03-10 22:01:54,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791282722] [2021-03-10 22:01:54,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:54,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:54,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:54,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:54,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:54,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900855150] [2021-03-10 22:01:54,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:54,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:54,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:54,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:54,954 INFO L87 Difference]: Start difference. First operand 354 states and 1101 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:55,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:55,136 INFO L93 Difference]: Finished difference Result 418 states and 1267 transitions. [2021-03-10 22:01:55,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:55,137 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:55,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:55,138 INFO L225 Difference]: With dead ends: 418 [2021-03-10 22:01:55,138 INFO L226 Difference]: Without dead ends: 406 [2021-03-10 22:01:55,138 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 202.4ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:55,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-03-10 22:01:55,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 358. [2021-03-10 22:01:55,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.112044817927171) internal successors, (1111), 357 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:55,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1111 transitions. [2021-03-10 22:01:55,141 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1111 transitions. Word has length 20 [2021-03-10 22:01:55,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:55,142 INFO L480 AbstractCegarLoop]: Abstraction has 358 states and 1111 transitions. [2021-03-10 22:01:55,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1111 transitions. [2021-03-10 22:01:55,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:55,142 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:55,142 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:55,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2140,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:55,343 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:55,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:55,343 INFO L82 PathProgramCache]: Analyzing trace with hash 2081949417, now seen corresponding path program 218 times [2021-03-10 22:01:55,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:55,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388826977] [2021-03-10 22:01:55,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:55,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388826977] [2021-03-10 22:01:55,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986145835] [2021-03-10 22:01:55,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:55,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:55,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:55,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:55,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:55,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:55,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:55,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075188887] [2021-03-10 22:01:55,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:55,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:55,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:55,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:55,550 INFO L87 Difference]: Start difference. First operand 358 states and 1111 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:55,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:55,737 INFO L93 Difference]: Finished difference Result 443 states and 1319 transitions. [2021-03-10 22:01:55,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:01:55,737 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:55,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:55,738 INFO L225 Difference]: With dead ends: 443 [2021-03-10 22:01:55,738 INFO L226 Difference]: Without dead ends: 437 [2021-03-10 22:01:55,738 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 211.9ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:55,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-03-10 22:01:55,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 368. [2021-03-10 22:01:55,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.100817438692098) internal successors, (1138), 367 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:55,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1138 transitions. [2021-03-10 22:01:55,742 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1138 transitions. Word has length 20 [2021-03-10 22:01:55,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:55,742 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 1138 transitions. [2021-03-10 22:01:55,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:55,742 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1138 transitions. [2021-03-10 22:01:55,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:55,742 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:55,743 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:55,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2146,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:55,944 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:55,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:55,944 INFO L82 PathProgramCache]: Analyzing trace with hash 166525491, now seen corresponding path program 219 times [2021-03-10 22:01:55,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:55,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576856427] [2021-03-10 22:01:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:55,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576856427] [2021-03-10 22:01:55,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568567290] [2021-03-10 22:01:55,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:56,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:01:56,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:56,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:01:56,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:56,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:01:56,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:56,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:56,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:56,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:01:56,152 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:56,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:01:56,155 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:56,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:01:56,158 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:56,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:01:56,161 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:56,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:01:56,164 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:01:56,193 INFO L628 ElimStorePlain]: treesize reduction 47, result has 37.3 percent of original size [2021-03-10 22:01:56,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:01:56,194 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:142, output treesize:28 [2021-03-10 22:01:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:56,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:56,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:01:56,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952464325] [2021-03-10 22:01:56,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:01:56,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:56,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:01:56,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:01:56,251 INFO L87 Difference]: Start difference. First operand 368 states and 1138 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:56,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:56,462 INFO L93 Difference]: Finished difference Result 414 states and 1265 transitions. [2021-03-10 22:01:56,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:56,462 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:56,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:56,463 INFO L225 Difference]: With dead ends: 414 [2021-03-10 22:01:56,463 INFO L226 Difference]: Without dead ends: 414 [2021-03-10 22:01:56,463 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:01:56,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-03-10 22:01:56,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 356. [2021-03-10 22:01:56,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.1154929577464787) internal successors, (1106), 355 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:56,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1106 transitions. [2021-03-10 22:01:56,467 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1106 transitions. Word has length 20 [2021-03-10 22:01:56,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:56,467 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 1106 transitions. [2021-03-10 22:01:56,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:56,467 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1106 transitions. [2021-03-10 22:01:56,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:56,467 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:56,468 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:56,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2154,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:56,668 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:56,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:56,668 INFO L82 PathProgramCache]: Analyzing trace with hash -30479213, now seen corresponding path program 220 times [2021-03-10 22:01:56,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:56,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719743796] [2021-03-10 22:01:56,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:56,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719743796] [2021-03-10 22:01:56,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107655387] [2021-03-10 22:01:56,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:56,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:01:56,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:56,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:56,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:56,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:56,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:56,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783490426] [2021-03-10 22:01:56,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:56,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:56,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:56,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:56,865 INFO L87 Difference]: Start difference. First operand 356 states and 1106 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:57,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:57,073 INFO L93 Difference]: Finished difference Result 449 states and 1334 transitions. [2021-03-10 22:01:57,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:57,073 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:57,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:57,074 INFO L225 Difference]: With dead ends: 449 [2021-03-10 22:01:57,074 INFO L226 Difference]: Without dead ends: 443 [2021-03-10 22:01:57,074 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 212.7ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:57,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-03-10 22:01:57,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 370. [2021-03-10 22:01:57,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.102981029810298) internal successors, (1145), 369 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:57,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1145 transitions. [2021-03-10 22:01:57,078 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1145 transitions. Word has length 20 [2021-03-10 22:01:57,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:57,078 INFO L480 AbstractCegarLoop]: Abstraction has 370 states and 1145 transitions. [2021-03-10 22:01:57,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:57,078 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1145 transitions. [2021-03-10 22:01:57,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:57,079 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:57,079 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:57,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2160,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:57,279 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:57,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:57,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1945903139, now seen corresponding path program 221 times [2021-03-10 22:01:57,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:57,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967831381] [2021-03-10 22:01:57,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:57,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967831381] [2021-03-10 22:01:57,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469563165] [2021-03-10 22:01:57,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:57,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:01:57,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:57,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:57,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:57,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:57,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:57,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:57,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868984684] [2021-03-10 22:01:57,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:57,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:57,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:57,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:57,478 INFO L87 Difference]: Start difference. First operand 370 states and 1145 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:57,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:57,689 INFO L93 Difference]: Finished difference Result 449 states and 1340 transitions. [2021-03-10 22:01:57,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:01:57,689 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:57,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:57,690 INFO L225 Difference]: With dead ends: 449 [2021-03-10 22:01:57,690 INFO L226 Difference]: Without dead ends: 449 [2021-03-10 22:01:57,690 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 220.2ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:01:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-03-10 22:01:57,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 368. [2021-03-10 22:01:57,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.106267029972752) internal successors, (1140), 367 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:57,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1140 transitions. [2021-03-10 22:01:57,694 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1140 transitions. Word has length 20 [2021-03-10 22:01:57,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:57,694 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 1140 transitions. [2021-03-10 22:01:57,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:57,694 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1140 transitions. [2021-03-10 22:01:57,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:57,694 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:57,695 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:57,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2166 [2021-03-10 22:01:57,895 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:57,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:57,895 INFO L82 PathProgramCache]: Analyzing trace with hash -905667341, now seen corresponding path program 222 times [2021-03-10 22:01:57,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:57,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470232907] [2021-03-10 22:01:57,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:57,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470232907] [2021-03-10 22:01:57,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783535959] [2021-03-10 22:01:57,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:58,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:01:58,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:58,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:58,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:58,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:58,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:01:58,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127344807] [2021-03-10 22:01:58,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:01:58,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:58,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:01:58,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:01:58,087 INFO L87 Difference]: Start difference. First operand 368 states and 1140 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:58,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:58,296 INFO L93 Difference]: Finished difference Result 424 states and 1290 transitions. [2021-03-10 22:01:58,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:58,296 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:58,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:58,297 INFO L225 Difference]: With dead ends: 424 [2021-03-10 22:01:58,297 INFO L226 Difference]: Without dead ends: 424 [2021-03-10 22:01:58,297 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 231.5ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:58,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-03-10 22:01:58,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 353. [2021-03-10 22:01:58,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.116477272727273) internal successors, (1097), 352 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:58,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1097 transitions. [2021-03-10 22:01:58,301 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1097 transitions. Word has length 20 [2021-03-10 22:01:58,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:58,301 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 1097 transitions. [2021-03-10 22:01:58,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:58,301 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1097 transitions. [2021-03-10 22:01:58,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:58,301 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:58,301 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:58,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2171,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:58,502 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:58,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:58,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1430277309, now seen corresponding path program 223 times [2021-03-10 22:01:58,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:58,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763054212] [2021-03-10 22:01:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:58,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763054212] [2021-03-10 22:01:58,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194649554] [2021-03-10 22:01:58,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:58,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:58,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:58,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:58,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:01:58,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881367034] [2021-03-10 22:01:58,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:01:58,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:58,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:01:58,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:01:58,682 INFO L87 Difference]: Start difference. First operand 353 states and 1097 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:58,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:58,874 INFO L93 Difference]: Finished difference Result 484 states and 1434 transitions. [2021-03-10 22:01:58,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:58,874 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:58,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:58,875 INFO L225 Difference]: With dead ends: 484 [2021-03-10 22:01:58,875 INFO L226 Difference]: Without dead ends: 466 [2021-03-10 22:01:58,875 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 177.8ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:58,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-03-10 22:01:58,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 357. [2021-03-10 22:01:58,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.109550561797753) internal successors, (1107), 356 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:58,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1107 transitions. [2021-03-10 22:01:58,880 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1107 transitions. Word has length 20 [2021-03-10 22:01:58,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:58,880 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 1107 transitions. [2021-03-10 22:01:58,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:58,880 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1107 transitions. [2021-03-10 22:01:58,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:58,880 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:58,880 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:59,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2174,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:59,081 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:59,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:59,081 INFO L82 PathProgramCache]: Analyzing trace with hash -852333885, now seen corresponding path program 224 times [2021-03-10 22:01:59,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:59,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848720986] [2021-03-10 22:01:59,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:59,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:59,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848720986] [2021-03-10 22:01:59,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246764661] [2021-03-10 22:01:59,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:59,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:01:59,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:59,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:59,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:59,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:59,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:59,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619983642] [2021-03-10 22:01:59,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:59,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:59,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:59,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:59,288 INFO L87 Difference]: Start difference. First operand 357 states and 1107 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:59,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:01:59,457 INFO L93 Difference]: Finished difference Result 480 states and 1426 transitions. [2021-03-10 22:01:59,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:01:59,458 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:01:59,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:01:59,458 INFO L225 Difference]: With dead ends: 480 [2021-03-10 22:01:59,458 INFO L226 Difference]: Without dead ends: 468 [2021-03-10 22:01:59,459 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 179.4ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:01:59,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-03-10 22:01:59,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 359. [2021-03-10 22:01:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.106145251396648) internal successors, (1112), 358 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:59,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1112 transitions. [2021-03-10 22:01:59,463 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1112 transitions. Word has length 20 [2021-03-10 22:01:59,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:01:59,463 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 1112 transitions. [2021-03-10 22:01:59,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:01:59,463 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1112 transitions. [2021-03-10 22:01:59,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:01:59,463 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:01:59,463 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:01:59,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2179 [2021-03-10 22:01:59,664 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:01:59,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:01:59,664 INFO L82 PathProgramCache]: Analyzing trace with hash -100933447, now seen corresponding path program 225 times [2021-03-10 22:01:59,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:01:59,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051621225] [2021-03-10 22:01:59,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:01:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:01:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:59,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051621225] [2021-03-10 22:01:59,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716863356] [2021-03-10 22:01:59,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:01:59,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:01:59,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:01:59,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:01:59,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:01:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:01:59,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:01:59,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:01:59,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068129688] [2021-03-10 22:01:59,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:01:59,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:01:59,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:01:59,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:01:59,878 INFO L87 Difference]: Start difference. First operand 359 states and 1112 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:00,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:00,125 INFO L93 Difference]: Finished difference Result 505 states and 1478 transitions. [2021-03-10 22:02:00,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:02:00,125 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:00,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:00,126 INFO L225 Difference]: With dead ends: 505 [2021-03-10 22:02:00,126 INFO L226 Difference]: Without dead ends: 499 [2021-03-10 22:02:00,126 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 265.9ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:02:00,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-03-10 22:02:00,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 369. [2021-03-10 22:02:00,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.095108695652174) internal successors, (1139), 368 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:00,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1139 transitions. [2021-03-10 22:02:00,131 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1139 transitions. Word has length 20 [2021-03-10 22:02:00,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:00,131 INFO L480 AbstractCegarLoop]: Abstraction has 369 states and 1139 transitions. [2021-03-10 22:02:00,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:00,131 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1139 transitions. [2021-03-10 22:02:00,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:00,131 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:00,132 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:00,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2185,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:00,332 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:00,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:00,332 INFO L82 PathProgramCache]: Analyzing trace with hash -2016357373, now seen corresponding path program 226 times [2021-03-10 22:02:00,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:00,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43791125] [2021-03-10 22:02:00,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:00,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43791125] [2021-03-10 22:02:00,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241573101] [2021-03-10 22:02:00,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:00,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:02:00,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:00,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:00,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:00,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:00,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:00,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731151419] [2021-03-10 22:02:00,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:00,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:00,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:00,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:00,541 INFO L87 Difference]: Start difference. First operand 369 states and 1139 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:00,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:00,723 INFO L93 Difference]: Finished difference Result 476 states and 1424 transitions. [2021-03-10 22:02:00,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:00,723 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:00,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:00,724 INFO L225 Difference]: With dead ends: 476 [2021-03-10 22:02:00,724 INFO L226 Difference]: Without dead ends: 476 [2021-03-10 22:02:00,724 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:00,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-03-10 22:02:00,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 355. [2021-03-10 22:02:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.1129943502824857) internal successors, (1102), 354 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:00,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1102 transitions. [2021-03-10 22:02:00,728 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1102 transitions. Word has length 20 [2021-03-10 22:02:00,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:00,729 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1102 transitions. [2021-03-10 22:02:00,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:00,729 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1102 transitions. [2021-03-10 22:02:00,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:00,729 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:00,729 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:00,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2189 [2021-03-10 22:02:00,930 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:00,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:00,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1488800739, now seen corresponding path program 227 times [2021-03-10 22:02:00,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:00,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682532598] [2021-03-10 22:02:00,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:00,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682532598] [2021-03-10 22:02:00,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500115148] [2021-03-10 22:02:00,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:01,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:01,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:01,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:01,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:01,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:01,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:02:01,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750326984] [2021-03-10 22:02:01,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:02:01,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:01,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:02:01,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:02:01,131 INFO L87 Difference]: Start difference. First operand 355 states and 1102 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:01,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:01,280 INFO L93 Difference]: Finished difference Result 415 states and 1258 transitions. [2021-03-10 22:02:01,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:01,280 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:01,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:01,281 INFO L225 Difference]: With dead ends: 415 [2021-03-10 22:02:01,281 INFO L226 Difference]: Without dead ends: 403 [2021-03-10 22:02:01,281 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:01,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-03-10 22:02:01,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 359. [2021-03-10 22:02:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.106145251396648) internal successors, (1112), 358 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1112 transitions. [2021-03-10 22:02:01,285 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1112 transitions. Word has length 20 [2021-03-10 22:02:01,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:01,285 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 1112 transitions. [2021-03-10 22:02:01,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:01,285 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1112 transitions. [2021-03-10 22:02:01,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:01,286 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:01,286 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:01,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2195,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:01,486 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:01,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:01,487 INFO L82 PathProgramCache]: Analyzing trace with hash -737400301, now seen corresponding path program 228 times [2021-03-10 22:02:01,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:01,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157624784] [2021-03-10 22:02:01,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:01,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157624784] [2021-03-10 22:02:01,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170461132] [2021-03-10 22:02:01,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:01,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:02:01,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:01,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:01,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:01,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:01,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:02:01,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209991925] [2021-03-10 22:02:01,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:02:01,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:01,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:02:01,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:02:01,678 INFO L87 Difference]: Start difference. First operand 359 states and 1112 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:01,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:01,880 INFO L93 Difference]: Finished difference Result 440 states and 1310 transitions. [2021-03-10 22:02:01,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:02:01,880 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:01,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:01,881 INFO L225 Difference]: With dead ends: 440 [2021-03-10 22:02:01,881 INFO L226 Difference]: Without dead ends: 434 [2021-03-10 22:02:01,881 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:02:01,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-03-10 22:02:01,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 369. [2021-03-10 22:02:01,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.095108695652174) internal successors, (1139), 368 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:01,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1139 transitions. [2021-03-10 22:02:01,885 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1139 transitions. Word has length 20 [2021-03-10 22:02:01,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:01,885 INFO L480 AbstractCegarLoop]: Abstraction has 369 states and 1139 transitions. [2021-03-10 22:02:01,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:01,885 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1139 transitions. [2021-03-10 22:02:01,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:01,886 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:01,886 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:02,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2203 [2021-03-10 22:02:02,086 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:02,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:02,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1642143069, now seen corresponding path program 229 times [2021-03-10 22:02:02,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:02,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419647146] [2021-03-10 22:02:02,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:02,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:02,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419647146] [2021-03-10 22:02:02,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166232407] [2021-03-10 22:02:02,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:02,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:02,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:02,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:02,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:02:02,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173612537] [2021-03-10 22:02:02,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:02:02,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:02,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:02:02,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:02:02,275 INFO L87 Difference]: Start difference. First operand 369 states and 1139 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:02,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:02,409 INFO L93 Difference]: Finished difference Result 411 states and 1256 transitions. [2021-03-10 22:02:02,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:02,409 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:02,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:02,410 INFO L225 Difference]: With dead ends: 411 [2021-03-10 22:02:02,410 INFO L226 Difference]: Without dead ends: 411 [2021-03-10 22:02:02,410 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:02,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-03-10 22:02:02,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 357. [2021-03-10 22:02:02,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.109550561797753) internal successors, (1107), 356 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:02,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1107 transitions. [2021-03-10 22:02:02,414 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1107 transitions. Word has length 20 [2021-03-10 22:02:02,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:02,414 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 1107 transitions. [2021-03-10 22:02:02,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:02,414 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1107 transitions. [2021-03-10 22:02:02,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:02,415 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:02,415 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:02,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2208,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:02,615 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:02,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:02,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1445138365, now seen corresponding path program 230 times [2021-03-10 22:02:02,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:02,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640263787] [2021-03-10 22:02:02,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:02,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640263787] [2021-03-10 22:02:02,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458921541] [2021-03-10 22:02:02,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:02,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:02,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:02,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:02,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:02,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:02,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:02:02,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673354660] [2021-03-10 22:02:02,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:02:02,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:02,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:02:02,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:02:02,798 INFO L87 Difference]: Start difference. First operand 357 states and 1107 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:02,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:02,957 INFO L93 Difference]: Finished difference Result 444 states and 1320 transitions. [2021-03-10 22:02:02,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:02,957 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:02,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:02,958 INFO L225 Difference]: With dead ends: 444 [2021-03-10 22:02:02,958 INFO L226 Difference]: Without dead ends: 438 [2021-03-10 22:02:02,958 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 171.7ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:02,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-03-10 22:02:02,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 371. [2021-03-10 22:02:02,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.097297297297297) internal successors, (1146), 370 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:02,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1146 transitions. [2021-03-10 22:02:02,962 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1146 transitions. Word has length 20 [2021-03-10 22:02:02,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:02,962 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 1146 transitions. [2021-03-10 22:02:02,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:02,963 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1146 transitions. [2021-03-10 22:02:02,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:02,963 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:02,963 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:03,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2212 [2021-03-10 22:02:03,164 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:03,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:03,164 INFO L82 PathProgramCache]: Analyzing trace with hash -470285561, now seen corresponding path program 231 times [2021-03-10 22:02:03,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:03,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131445721] [2021-03-10 22:02:03,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:03,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:03,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131445721] [2021-03-10 22:02:03,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601577753] [2021-03-10 22:02:03,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:03,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:02:03,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:03,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:03,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:03,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:03,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:02:03,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548639176] [2021-03-10 22:02:03,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:02:03,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:03,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:02:03,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:02:03,339 INFO L87 Difference]: Start difference. First operand 371 states and 1146 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:03,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:03,508 INFO L93 Difference]: Finished difference Result 444 states and 1326 transitions. [2021-03-10 22:02:03,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:02:03,508 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:03,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:03,509 INFO L225 Difference]: With dead ends: 444 [2021-03-10 22:02:03,509 INFO L226 Difference]: Without dead ends: 444 [2021-03-10 22:02:03,509 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 171.9ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:03,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-03-10 22:02:03,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 369. [2021-03-10 22:02:03,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.1005434782608696) internal successors, (1141), 368 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:03,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1141 transitions. [2021-03-10 22:02:03,514 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1141 transitions. Word has length 20 [2021-03-10 22:02:03,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:03,514 INFO L480 AbstractCegarLoop]: Abstraction has 369 states and 1141 transitions. [2021-03-10 22:02:03,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:03,514 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1141 transitions. [2021-03-10 22:02:03,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:03,514 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:03,514 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:03,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2217,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:03,716 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:03,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:03,716 INFO L82 PathProgramCache]: Analyzing trace with hash 569950237, now seen corresponding path program 232 times [2021-03-10 22:02:03,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:03,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584661519] [2021-03-10 22:02:03,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:03,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584661519] [2021-03-10 22:02:03,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480320363] [2021-03-10 22:02:03,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:03,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:02:03,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:03,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:03,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:03,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:03,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:02:03,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894072880] [2021-03-10 22:02:03,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:02:03,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:03,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:02:03,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:02:03,886 INFO L87 Difference]: Start difference. First operand 369 states and 1141 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:04,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:04,052 INFO L93 Difference]: Finished difference Result 419 states and 1276 transitions. [2021-03-10 22:02:04,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:04,053 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:04,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:04,053 INFO L225 Difference]: With dead ends: 419 [2021-03-10 22:02:04,054 INFO L226 Difference]: Without dead ends: 419 [2021-03-10 22:02:04,054 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 171.6ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:04,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-03-10 22:02:04,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 355. [2021-03-10 22:02:04,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.1129943502824857) internal successors, (1102), 354 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:04,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1102 transitions. [2021-03-10 22:02:04,058 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1102 transitions. Word has length 20 [2021-03-10 22:02:04,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:04,058 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1102 transitions. [2021-03-10 22:02:04,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:04,058 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1102 transitions. [2021-03-10 22:02:04,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:04,058 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:04,059 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:04,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2221 [2021-03-10 22:02:04,259 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:04,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:04,259 INFO L82 PathProgramCache]: Analyzing trace with hash 282367230, now seen corresponding path program 233 times [2021-03-10 22:02:04,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:04,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416743552] [2021-03-10 22:02:04,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:04,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416743552] [2021-03-10 22:02:04,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125200207] [2021-03-10 22:02:04,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:04,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:04,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:04,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:02:04,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:04,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:04,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:04,379 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:04,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:04,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:04,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:04,403 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:02:04,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:02:04,404 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:63, output treesize:20 [2021-03-10 22:02:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:04,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:04,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-10 22:02:04,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263793131] [2021-03-10 22:02:04,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:02:04,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:04,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:02:04,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:02:04,437 INFO L87 Difference]: Start difference. First operand 355 states and 1102 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:04,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:04,571 INFO L93 Difference]: Finished difference Result 450 states and 1376 transitions. [2021-03-10 22:02:04,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:02:04,572 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:04,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:04,572 INFO L225 Difference]: With dead ends: 450 [2021-03-10 22:02:04,572 INFO L226 Difference]: Without dead ends: 407 [2021-03-10 22:02:04,572 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:02:04,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-03-10 22:02:04,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 355. [2021-03-10 22:02:04,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.1129943502824857) internal successors, (1102), 354 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:04,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1102 transitions. [2021-03-10 22:02:04,576 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1102 transitions. Word has length 20 [2021-03-10 22:02:04,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:04,576 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1102 transitions. [2021-03-10 22:02:04,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:04,576 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1102 transitions. [2021-03-10 22:02:04,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:04,577 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:04,577 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:04,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2223,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:04,777 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:04,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:04,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1508226211, now seen corresponding path program 234 times [2021-03-10 22:02:04,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:04,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858874274] [2021-03-10 22:02:04,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:04,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858874274] [2021-03-10 22:02:04,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568112973] [2021-03-10 22:02:04,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:04,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:02:04,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:04,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:04,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:04,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:04,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:04,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:04,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:04,962 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-03-10 22:02:04,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:02:04,963 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-03-10 22:02:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:04,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:04,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:02:04,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48100337] [2021-03-10 22:02:04,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:02:04,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:04,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:02:04,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:02:04,974 INFO L87 Difference]: Start difference. First operand 355 states and 1102 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:05,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:05,102 INFO L93 Difference]: Finished difference Result 442 states and 1324 transitions. [2021-03-10 22:02:05,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:05,102 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:05,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:05,103 INFO L225 Difference]: With dead ends: 442 [2021-03-10 22:02:05,103 INFO L226 Difference]: Without dead ends: 442 [2021-03-10 22:02:05,103 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:02:05,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-03-10 22:02:05,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 365. [2021-03-10 22:02:05,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.098901098901099) internal successors, (1128), 364 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:05,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1128 transitions. [2021-03-10 22:02:05,107 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1128 transitions. Word has length 20 [2021-03-10 22:02:05,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:05,107 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 1128 transitions. [2021-03-10 22:02:05,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:05,107 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1128 transitions. [2021-03-10 22:02:05,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:05,108 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:05,108 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:05,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2227 [2021-03-10 22:02:05,315 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:05,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:05,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1628097555, now seen corresponding path program 235 times [2021-03-10 22:02:05,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:05,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369570898] [2021-03-10 22:02:05,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:05,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369570898] [2021-03-10 22:02:05,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007979389] [2021-03-10 22:02:05,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:05,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:05,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:05,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:05,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:05,484 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-03-10 22:02:05,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:02:05,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-03-10 22:02:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:05,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:05,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:02:05,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414198842] [2021-03-10 22:02:05,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:02:05,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:05,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:02:05,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:02:05,507 INFO L87 Difference]: Start difference. First operand 365 states and 1128 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:05,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:05,634 INFO L93 Difference]: Finished difference Result 494 states and 1445 transitions. [2021-03-10 22:02:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:05,634 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:05,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:05,635 INFO L225 Difference]: With dead ends: 494 [2021-03-10 22:02:05,635 INFO L226 Difference]: Without dead ends: 494 [2021-03-10 22:02:05,635 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:02:05,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-03-10 22:02:05,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 368. [2021-03-10 22:02:05,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.103542234332425) internal successors, (1139), 367 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:05,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1139 transitions. [2021-03-10 22:02:05,640 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1139 transitions. Word has length 20 [2021-03-10 22:02:05,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:05,640 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 1139 transitions. [2021-03-10 22:02:05,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:05,640 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1139 transitions. [2021-03-10 22:02:05,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:05,641 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:05,641 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:05,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2234,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:05,856 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:05,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:05,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1172962019, now seen corresponding path program 236 times [2021-03-10 22:02:05,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:05,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80828083] [2021-03-10 22:02:05,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:05,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80828083] [2021-03-10 22:02:05,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049463242] [2021-03-10 22:02:05,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:05,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:05,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:05,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:05,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:06,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:06,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:06,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:06,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:06,036 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-03-10 22:02:06,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:02:06,036 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-03-10 22:02:06,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:06,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:06,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:02:06,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782729340] [2021-03-10 22:02:06,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:02:06,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:06,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:02:06,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:02:06,058 INFO L87 Difference]: Start difference. First operand 368 states and 1139 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:06,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:06,182 INFO L93 Difference]: Finished difference Result 451 states and 1342 transitions. [2021-03-10 22:02:06,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:06,183 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:06,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:06,183 INFO L225 Difference]: With dead ends: 451 [2021-03-10 22:02:06,183 INFO L226 Difference]: Without dead ends: 445 [2021-03-10 22:02:06,183 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:02:06,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-03-10 22:02:06,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 360. [2021-03-10 22:02:06,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.105849582172702) internal successors, (1115), 359 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:06,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1115 transitions. [2021-03-10 22:02:06,192 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1115 transitions. Word has length 20 [2021-03-10 22:02:06,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:06,193 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 1115 transitions. [2021-03-10 22:02:06,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:06,193 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1115 transitions. [2021-03-10 22:02:06,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:06,193 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:06,193 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:06,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2243 [2021-03-10 22:02:06,394 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:06,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:06,394 INFO L82 PathProgramCache]: Analyzing trace with hash -534005967, now seen corresponding path program 237 times [2021-03-10 22:02:06,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:06,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682655889] [2021-03-10 22:02:06,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:06,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682655889] [2021-03-10 22:02:06,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663611126] [2021-03-10 22:02:06,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:06,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:02:06,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:06,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:06,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:06,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:06,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:02:06,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198715536] [2021-03-10 22:02:06,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:02:06,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:06,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:02:06,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:02:06,604 INFO L87 Difference]: Start difference. First operand 360 states and 1115 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:06,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:06,768 INFO L93 Difference]: Finished difference Result 420 states and 1258 transitions. [2021-03-10 22:02:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:06,768 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:06,769 INFO L225 Difference]: With dead ends: 420 [2021-03-10 22:02:06,769 INFO L226 Difference]: Without dead ends: 420 [2021-03-10 22:02:06,769 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:02:06,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-03-10 22:02:06,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 366. [2021-03-10 22:02:06,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.115068493150685) internal successors, (1137), 365 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:06,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1137 transitions. [2021-03-10 22:02:06,773 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1137 transitions. Word has length 20 [2021-03-10 22:02:06,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:06,773 INFO L480 AbstractCegarLoop]: Abstraction has 366 states and 1137 transitions. [2021-03-10 22:02:06,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:06,774 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1137 transitions. [2021-03-10 22:02:06,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:06,774 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:06,774 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:06,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2252,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:06,975 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:06,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:06,975 INFO L82 PathProgramCache]: Analyzing trace with hash -2027913689, now seen corresponding path program 238 times [2021-03-10 22:02:06,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:06,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559754541] [2021-03-10 22:02:06,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:07,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559754541] [2021-03-10 22:02:07,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625569720] [2021-03-10 22:02:07,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:07,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:02:07,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:07,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:07,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:07,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:07,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:02:07,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239303742] [2021-03-10 22:02:07,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:02:07,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:07,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:02:07,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:02:07,196 INFO L87 Difference]: Start difference. First operand 366 states and 1137 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:07,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:07,413 INFO L93 Difference]: Finished difference Result 426 states and 1265 transitions. [2021-03-10 22:02:07,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:07,414 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:07,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:07,415 INFO L225 Difference]: With dead ends: 426 [2021-03-10 22:02:07,415 INFO L226 Difference]: Without dead ends: 420 [2021-03-10 22:02:07,415 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:07,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-03-10 22:02:07,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 363. [2021-03-10 22:02:07,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.110497237569061) internal successors, (1126), 362 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:07,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1126 transitions. [2021-03-10 22:02:07,419 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1126 transitions. Word has length 20 [2021-03-10 22:02:07,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:07,419 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 1126 transitions. [2021-03-10 22:02:07,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:07,419 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1126 transitions. [2021-03-10 22:02:07,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:07,420 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:07,420 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:07,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2265 [2021-03-10 22:02:07,628 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:07,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:07,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1490058111, now seen corresponding path program 239 times [2021-03-10 22:02:07,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:07,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094032371] [2021-03-10 22:02:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:07,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:07,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094032371] [2021-03-10 22:02:07,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597701992] [2021-03-10 22:02:07,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:07,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:07,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:07,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:07,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:07,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:07,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:02:07,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604595073] [2021-03-10 22:02:07,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:02:07,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:07,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:02:07,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:02:07,837 INFO L87 Difference]: Start difference. First operand 363 states and 1126 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:08,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:08,071 INFO L93 Difference]: Finished difference Result 384 states and 1170 transitions. [2021-03-10 22:02:08,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:08,072 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:08,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:08,072 INFO L225 Difference]: With dead ends: 384 [2021-03-10 22:02:08,072 INFO L226 Difference]: Without dead ends: 372 [2021-03-10 22:02:08,072 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 263.5ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:02:08,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-03-10 22:02:08,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 355. [2021-03-10 22:02:08,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.1129943502824857) internal successors, (1102), 354 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:08,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1102 transitions. [2021-03-10 22:02:08,076 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1102 transitions. Word has length 20 [2021-03-10 22:02:08,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:08,076 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1102 transitions. [2021-03-10 22:02:08,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:08,076 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1102 transitions. [2021-03-10 22:02:08,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:08,077 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:08,077 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:08,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2273,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:08,277 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:08,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:08,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1040166238, now seen corresponding path program 240 times [2021-03-10 22:02:08,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:08,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648100663] [2021-03-10 22:02:08,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:08,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648100663] [2021-03-10 22:02:08,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038707015] [2021-03-10 22:02:08,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:08,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:02:08,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:08,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:08,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:08,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:08,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:08,425 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:08,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:08,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:08,428 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:08,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:08,431 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:08,451 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-03-10 22:02:08,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:08,452 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-03-10 22:02:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:08,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:08,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:02:08,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559646660] [2021-03-10 22:02:08,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:08,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:08,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:08,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:08,510 INFO L87 Difference]: Start difference. First operand 355 states and 1102 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:08,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:08,741 INFO L93 Difference]: Finished difference Result 554 states and 1648 transitions. [2021-03-10 22:02:08,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:08,741 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:08,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:08,742 INFO L225 Difference]: With dead ends: 554 [2021-03-10 22:02:08,742 INFO L226 Difference]: Without dead ends: 502 [2021-03-10 22:02:08,742 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 186.2ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:08,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-03-10 22:02:08,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 355. [2021-03-10 22:02:08,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.1129943502824857) internal successors, (1102), 354 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:08,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1102 transitions. [2021-03-10 22:02:08,747 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1102 transitions. Word has length 20 [2021-03-10 22:02:08,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:08,747 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1102 transitions. [2021-03-10 22:02:08,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:08,747 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1102 transitions. [2021-03-10 22:02:08,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:08,747 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:08,747 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:08,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2282 [2021-03-10 22:02:08,948 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:08,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:08,948 INFO L82 PathProgramCache]: Analyzing trace with hash 2049541401, now seen corresponding path program 241 times [2021-03-10 22:02:08,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:08,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75959595] [2021-03-10 22:02:08,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:09,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75959595] [2021-03-10 22:02:09,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361076786] [2021-03-10 22:02:09,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:09,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:09,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:09,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:09,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:09,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:09,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:09,156 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:09,158 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,178 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-03-10 22:02:09,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:09,179 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-03-10 22:02:09,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:09,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:09,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:02:09,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715849137] [2021-03-10 22:02:09,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:02:09,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:09,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:02:09,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:02:09,212 INFO L87 Difference]: Start difference. First operand 355 states and 1102 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:09,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:09,366 INFO L93 Difference]: Finished difference Result 595 states and 1732 transitions. [2021-03-10 22:02:09,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:09,366 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:09,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:09,367 INFO L225 Difference]: With dead ends: 595 [2021-03-10 22:02:09,368 INFO L226 Difference]: Without dead ends: 595 [2021-03-10 22:02:09,368 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:09,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-03-10 22:02:09,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 367. [2021-03-10 22:02:09,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.122950819672131) internal successors, (1143), 366 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:09,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1143 transitions. [2021-03-10 22:02:09,372 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1143 transitions. Word has length 20 [2021-03-10 22:02:09,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:09,372 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 1143 transitions. [2021-03-10 22:02:09,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:09,372 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1143 transitions. [2021-03-10 22:02:09,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:09,373 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:09,373 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:09,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2293,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:09,573 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:09,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:09,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1086782365, now seen corresponding path program 242 times [2021-03-10 22:02:09,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:09,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541241303] [2021-03-10 22:02:09,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:09,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:09,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541241303] [2021-03-10 22:02:09,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134209197] [2021-03-10 22:02:09,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:09,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:09,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:09,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:09,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:09,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:09,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:09,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,780 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.7 percent of original size [2021-03-10 22:02:09,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:09,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:09,785 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:09,805 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-03-10 22:02:09,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:09,806 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-03-10 22:02:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:09,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:09,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:02:09,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393319678] [2021-03-10 22:02:09,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:02:09,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:09,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:02:09,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:02:09,850 INFO L87 Difference]: Start difference. First operand 367 states and 1143 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:10,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:10,006 INFO L93 Difference]: Finished difference Result 647 states and 1853 transitions. [2021-03-10 22:02:10,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:10,006 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:10,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:10,007 INFO L225 Difference]: With dead ends: 647 [2021-03-10 22:02:10,007 INFO L226 Difference]: Without dead ends: 647 [2021-03-10 22:02:10,008 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:10,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-03-10 22:02:10,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 373. [2021-03-10 22:02:10,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 3.139784946236559) internal successors, (1168), 372 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:10,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1168 transitions. [2021-03-10 22:02:10,012 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1168 transitions. Word has length 20 [2021-03-10 22:02:10,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:10,012 INFO L480 AbstractCegarLoop]: Abstraction has 373 states and 1168 transitions. [2021-03-10 22:02:10,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:10,012 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1168 transitions. [2021-03-10 22:02:10,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:10,013 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:10,013 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:10,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2305 [2021-03-10 22:02:10,214 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:10,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:10,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1714277209, now seen corresponding path program 243 times [2021-03-10 22:02:10,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:10,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451264747] [2021-03-10 22:02:10,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:10,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451264747] [2021-03-10 22:02:10,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094949819] [2021-03-10 22:02:10,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:10,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:02:10,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:10,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:10,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:10,392 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:10,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:10,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:10,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:10,449 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.6 percent of original size [2021-03-10 22:02:10,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:10,453 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:10,487 INFO L628 ElimStorePlain]: treesize reduction 17, result has 66.0 percent of original size [2021-03-10 22:02:10,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:10,491 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:10,513 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:02:10,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:10,514 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-03-10 22:02:10,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:10,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:10,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:02:10,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818460502] [2021-03-10 22:02:10,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:02:10,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:10,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:02:10,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:02:10,559 INFO L87 Difference]: Start difference. First operand 373 states and 1168 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:10,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:10,699 INFO L93 Difference]: Finished difference Result 604 states and 1744 transitions. [2021-03-10 22:02:10,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:10,699 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:10,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:10,700 INFO L225 Difference]: With dead ends: 604 [2021-03-10 22:02:10,700 INFO L226 Difference]: Without dead ends: 598 [2021-03-10 22:02:10,700 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:10,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-03-10 22:02:10,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 371. [2021-03-10 22:02:10,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.127027027027027) internal successors, (1157), 370 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:10,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1157 transitions. [2021-03-10 22:02:10,705 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1157 transitions. Word has length 20 [2021-03-10 22:02:10,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:10,705 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 1157 transitions. [2021-03-10 22:02:10,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:10,705 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1157 transitions. [2021-03-10 22:02:10,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:10,705 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:10,705 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:10,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2319,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:10,906 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:10,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:10,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1834913410, now seen corresponding path program 244 times [2021-03-10 22:02:10,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:10,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298358726] [2021-03-10 22:02:10,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:10,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:10,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298358726] [2021-03-10 22:02:10,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449659535] [2021-03-10 22:02:10,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:11,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:02:11,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:11,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:11,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:11,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:11,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:11,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,103 INFO L628 ElimStorePlain]: treesize reduction 13, result has 67.5 percent of original size [2021-03-10 22:02:11,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:11,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:11,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:11,114 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-03-10 22:02:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:11,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:11,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:02:11,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304854410] [2021-03-10 22:02:11,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:11,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:11,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:11,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:11,166 INFO L87 Difference]: Start difference. First operand 371 states and 1157 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:11,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:11,375 INFO L93 Difference]: Finished difference Result 487 states and 1464 transitions. [2021-03-10 22:02:11,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:11,375 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:11,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:11,376 INFO L225 Difference]: With dead ends: 487 [2021-03-10 22:02:11,376 INFO L226 Difference]: Without dead ends: 425 [2021-03-10 22:02:11,376 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:11,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-03-10 22:02:11,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 365. [2021-03-10 22:02:11,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.098901098901099) internal successors, (1128), 364 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:11,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1128 transitions. [2021-03-10 22:02:11,380 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1128 transitions. Word has length 20 [2021-03-10 22:02:11,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:11,380 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 1128 transitions. [2021-03-10 22:02:11,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:11,380 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1128 transitions. [2021-03-10 22:02:11,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:11,381 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:11,381 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:11,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2329,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:11,581 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:11,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:11,581 INFO L82 PathProgramCache]: Analyzing trace with hash -426848797, now seen corresponding path program 245 times [2021-03-10 22:02:11,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:11,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221688154] [2021-03-10 22:02:11,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:11,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221688154] [2021-03-10 22:02:11,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41983921] [2021-03-10 22:02:11,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:11,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:02:11,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:11,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:11,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:11,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:11,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:11,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,802 INFO L628 ElimStorePlain]: treesize reduction 14, result has 77.0 percent of original size [2021-03-10 22:02:11,802 INFO L518 ElimStorePlain]: Eliminatee v_prenex_70 vanished before elimination [2021-03-10 22:02:11,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:11,805 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:11,827 INFO L628 ElimStorePlain]: treesize reduction 21, result has 48.8 percent of original size [2021-03-10 22:02:11,827 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:02:11,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:11,827 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:80, output treesize:20 [2021-03-10 22:02:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:11,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:11,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:11,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534609750] [2021-03-10 22:02:11,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:11,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:11,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:11,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:11,873 INFO L87 Difference]: Start difference. First operand 365 states and 1128 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:12,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:12,004 INFO L93 Difference]: Finished difference Result 548 states and 1610 transitions. [2021-03-10 22:02:12,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:12,004 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:12,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:12,005 INFO L225 Difference]: With dead ends: 548 [2021-03-10 22:02:12,005 INFO L226 Difference]: Without dead ends: 548 [2021-03-10 22:02:12,005 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:12,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-03-10 22:02:12,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 355. [2021-03-10 22:02:12,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.098870056497175) internal successors, (1097), 354 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:12,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1097 transitions. [2021-03-10 22:02:12,009 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1097 transitions. Word has length 20 [2021-03-10 22:02:12,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:12,009 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1097 transitions. [2021-03-10 22:02:12,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:12,009 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1097 transitions. [2021-03-10 22:02:12,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:12,010 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:12,010 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:12,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2340,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:12,210 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:12,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:12,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1206202595, now seen corresponding path program 246 times [2021-03-10 22:02:12,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:12,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860137623] [2021-03-10 22:02:12,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:12,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:12,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860137623] [2021-03-10 22:02:12,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014785558] [2021-03-10 22:02:12,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:12,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:02:12,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:12,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:12,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:12,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:12,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:12,431 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2021-03-10 22:02:12,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:12,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:12,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:12,436 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:12,454 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:02:12,454 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:02:12,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:12,455 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-03-10 22:02:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:12,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:12,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:12,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194806231] [2021-03-10 22:02:12,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:12,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:12,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:12,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:12,525 INFO L87 Difference]: Start difference. First operand 355 states and 1097 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:12,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:12,685 INFO L93 Difference]: Finished difference Result 515 states and 1528 transitions. [2021-03-10 22:02:12,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:12,685 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:12,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:12,686 INFO L225 Difference]: With dead ends: 515 [2021-03-10 22:02:12,686 INFO L226 Difference]: Without dead ends: 515 [2021-03-10 22:02:12,687 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 166.5ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:12,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-03-10 22:02:12,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 358. [2021-03-10 22:02:12,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.11484593837535) internal successors, (1112), 357 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:12,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1112 transitions. [2021-03-10 22:02:12,691 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1112 transitions. Word has length 20 [2021-03-10 22:02:12,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:12,691 INFO L480 AbstractCegarLoop]: Abstraction has 358 states and 1112 transitions. [2021-03-10 22:02:12,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:12,691 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1112 transitions. [2021-03-10 22:02:12,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:12,692 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:12,692 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:12,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2349 [2021-03-10 22:02:12,893 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:12,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:12,893 INFO L82 PathProgramCache]: Analyzing trace with hash -750934361, now seen corresponding path program 247 times [2021-03-10 22:02:12,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:12,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459516726] [2021-03-10 22:02:12,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:12,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459516726] [2021-03-10 22:02:12,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322847868] [2021-03-10 22:02:12,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:13,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:13,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:13,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:13,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:13,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:13,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:13,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:13,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:13,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:13,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:13,110 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:13,130 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-03-10 22:02:13,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:13,130 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-03-10 22:02:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:13,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:13,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:13,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199632249] [2021-03-10 22:02:13,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:13,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:13,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:13,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:13,197 INFO L87 Difference]: Start difference. First operand 358 states and 1112 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:13,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:13,327 INFO L93 Difference]: Finished difference Result 482 states and 1451 transitions. [2021-03-10 22:02:13,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:13,328 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:13,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:13,328 INFO L225 Difference]: With dead ends: 482 [2021-03-10 22:02:13,328 INFO L226 Difference]: Without dead ends: 482 [2021-03-10 22:02:13,329 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:13,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-03-10 22:02:13,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 349. [2021-03-10 22:02:13,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.0833333333333335) internal successors, (1073), 348 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:13,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1073 transitions. [2021-03-10 22:02:13,333 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1073 transitions. Word has length 20 [2021-03-10 22:02:13,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:13,333 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 1073 transitions. [2021-03-10 22:02:13,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:13,333 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1073 transitions. [2021-03-10 22:02:13,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:13,333 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:13,333 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:13,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2362,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:13,543 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:13,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:13,543 INFO L82 PathProgramCache]: Analyzing trace with hash 538015729, now seen corresponding path program 248 times [2021-03-10 22:02:13,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:13,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797212320] [2021-03-10 22:02:13,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:13,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797212320] [2021-03-10 22:02:13,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808476047] [2021-03-10 22:02:13,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:13,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:13,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:13,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:13,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:13,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:13,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:13,751 INFO L628 ElimStorePlain]: treesize reduction 4, result has 91.8 percent of original size [2021-03-10 22:02:13,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:13,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:13,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:13,756 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:13,795 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-03-10 22:02:13,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:13,795 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-03-10 22:02:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:13,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:13,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:13,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133179300] [2021-03-10 22:02:13,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:13,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:13,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:13,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:13,871 INFO L87 Difference]: Start difference. First operand 349 states and 1073 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:14,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:14,084 INFO L93 Difference]: Finished difference Result 592 states and 1735 transitions. [2021-03-10 22:02:14,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:14,084 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:14,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:14,085 INFO L225 Difference]: With dead ends: 592 [2021-03-10 22:02:14,085 INFO L226 Difference]: Without dead ends: 592 [2021-03-10 22:02:14,085 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:14,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-03-10 22:02:14,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 357. [2021-03-10 22:02:14,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.115168539325843) internal successors, (1109), 356 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:14,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1109 transitions. [2021-03-10 22:02:14,090 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1109 transitions. Word has length 20 [2021-03-10 22:02:14,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:14,090 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 1109 transitions. [2021-03-10 22:02:14,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:14,090 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1109 transitions. [2021-03-10 22:02:14,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:14,090 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:14,090 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:14,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2374,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:14,291 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:14,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:14,291 INFO L82 PathProgramCache]: Analyzing trace with hash -955891993, now seen corresponding path program 249 times [2021-03-10 22:02:14,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:14,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027064215] [2021-03-10 22:02:14,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:14,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:14,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027064215] [2021-03-10 22:02:14,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522529192] [2021-03-10 22:02:14,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:14,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:02:14,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:14,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:14,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:14,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:14,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:14,510 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.4 percent of original size [2021-03-10 22:02:14,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:14,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:14,546 INFO L628 ElimStorePlain]: treesize reduction 8, result has 83.3 percent of original size [2021-03-10 22:02:14,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:14,548 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:14,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:14,551 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:14,569 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:02:14,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:14,570 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:61, output treesize:20 [2021-03-10 22:02:14,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:14,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:14,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:14,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902472307] [2021-03-10 22:02:14,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:14,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:14,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:14,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:14,644 INFO L87 Difference]: Start difference. First operand 357 states and 1109 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:14,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:14,822 INFO L93 Difference]: Finished difference Result 578 states and 1684 transitions. [2021-03-10 22:02:14,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:14,822 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:14,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:14,823 INFO L225 Difference]: With dead ends: 578 [2021-03-10 22:02:14,823 INFO L226 Difference]: Without dead ends: 572 [2021-03-10 22:02:14,823 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 211.4ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:14,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-03-10 22:02:14,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 360. [2021-03-10 22:02:14,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.094707520891365) internal successors, (1111), 359 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:14,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1111 transitions. [2021-03-10 22:02:14,828 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1111 transitions. Word has length 20 [2021-03-10 22:02:14,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:14,828 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 1111 transitions. [2021-03-10 22:02:14,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:14,828 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1111 transitions. [2021-03-10 22:02:14,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:14,829 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:14,829 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:15,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2386 [2021-03-10 22:02:15,029 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:15,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:15,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1289416167, now seen corresponding path program 250 times [2021-03-10 22:02:15,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:15,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405068406] [2021-03-10 22:02:15,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:15,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405068406] [2021-03-10 22:02:15,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785290289] [2021-03-10 22:02:15,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:15,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:02:15,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:15,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:15,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:15,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:15,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:15,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:15,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:15,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:15,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:15,235 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:15,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:15,237 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:15,265 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-03-10 22:02:15,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:15,265 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-03-10 22:02:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:15,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:15,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:15,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728458276] [2021-03-10 22:02:15,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:15,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:15,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:15,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:15,344 INFO L87 Difference]: Start difference. First operand 360 states and 1111 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:15,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:15,589 INFO L93 Difference]: Finished difference Result 588 states and 1718 transitions. [2021-03-10 22:02:15,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:15,590 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:15,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:15,591 INFO L225 Difference]: With dead ends: 588 [2021-03-10 22:02:15,591 INFO L226 Difference]: Without dead ends: 588 [2021-03-10 22:02:15,591 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 227.8ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:15,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-03-10 22:02:15,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 353. [2021-03-10 22:02:15,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.1051136363636362) internal successors, (1093), 352 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:15,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1093 transitions. [2021-03-10 22:02:15,595 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1093 transitions. Word has length 20 [2021-03-10 22:02:15,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:15,596 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 1093 transitions. [2021-03-10 22:02:15,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:15,596 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1093 transitions. [2021-03-10 22:02:15,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:15,596 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:15,596 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:15,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2397 [2021-03-10 22:02:15,797 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:15,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:15,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1713208729, now seen corresponding path program 251 times [2021-03-10 22:02:15,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:15,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109382368] [2021-03-10 22:02:15,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:15,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109382368] [2021-03-10 22:02:15,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315597062] [2021-03-10 22:02:15,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:15,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:02:15,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:15,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:02:15,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:15,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:15,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:15,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:15,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:15,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:15,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:15,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:15,989 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:15,991 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:15,992 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:15,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:15,996 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:15,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:15,999 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:16,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:16,002 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:16,048 INFO L628 ElimStorePlain]: treesize reduction 41, result has 48.8 percent of original size [2021-03-10 22:02:16,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:02:16,049 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:179, output treesize:39 [2021-03-10 22:02:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:16,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:16,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:02:16,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117761611] [2021-03-10 22:02:16,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:02:16,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:16,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:02:16,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:16,198 INFO L87 Difference]: Start difference. First operand 353 states and 1093 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:16,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:16,540 INFO L93 Difference]: Finished difference Result 557 states and 1651 transitions. [2021-03-10 22:02:16,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:16,540 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:16,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:16,541 INFO L225 Difference]: With dead ends: 557 [2021-03-10 22:02:16,541 INFO L226 Difference]: Without dead ends: 557 [2021-03-10 22:02:16,542 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 345.6ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:02:16,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-03-10 22:02:16,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 350. [2021-03-10 22:02:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.0888252148997135) internal successors, (1078), 349 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:16,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1078 transitions. [2021-03-10 22:02:16,546 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1078 transitions. Word has length 20 [2021-03-10 22:02:16,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:16,546 INFO L480 AbstractCegarLoop]: Abstraction has 350 states and 1078 transitions. [2021-03-10 22:02:16,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:16,546 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1078 transitions. [2021-03-10 22:02:16,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:16,546 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:16,546 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:16,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2410,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:16,747 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:16,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:16,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1310152695, now seen corresponding path program 252 times [2021-03-10 22:02:16,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:16,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435365351] [2021-03-10 22:02:16,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:16,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:16,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435365351] [2021-03-10 22:02:16,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817843414] [2021-03-10 22:02:16,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:16,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:02:16,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:16,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:16,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:16,930 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:16,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:16,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:16,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:16,970 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.7 percent of original size [2021-03-10 22:02:16,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:16,973 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:16,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:16,976 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:16,996 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-03-10 22:02:16,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:16,997 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-03-10 22:02:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:17,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:17,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:17,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678872114] [2021-03-10 22:02:17,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:17,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:17,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:17,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:17,071 INFO L87 Difference]: Start difference. First operand 350 states and 1078 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:17,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:17,261 INFO L93 Difference]: Finished difference Result 523 states and 1538 transitions. [2021-03-10 22:02:17,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:17,262 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:17,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:17,263 INFO L225 Difference]: With dead ends: 523 [2021-03-10 22:02:17,263 INFO L226 Difference]: Without dead ends: 517 [2021-03-10 22:02:17,263 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:17,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-03-10 22:02:17,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 360. [2021-03-10 22:02:17,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.0779944289693595) internal successors, (1105), 359 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:17,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1105 transitions. [2021-03-10 22:02:17,268 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1105 transitions. Word has length 20 [2021-03-10 22:02:17,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:17,268 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 1105 transitions. [2021-03-10 22:02:17,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:17,268 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1105 transitions. [2021-03-10 22:02:17,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:17,269 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:17,269 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:17,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2423 [2021-03-10 22:02:17,473 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:17,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:17,473 INFO L82 PathProgramCache]: Analyzing trace with hash -605271231, now seen corresponding path program 253 times [2021-03-10 22:02:17,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:17,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566532902] [2021-03-10 22:02:17,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:17,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566532902] [2021-03-10 22:02:17,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707992476] [2021-03-10 22:02:17,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:17,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:17,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:17,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:17,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:17,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:17,656 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:17,699 INFO L628 ElimStorePlain]: treesize reduction 15, result has 77.3 percent of original size [2021-03-10 22:02:17,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:17,702 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:17,733 INFO L628 ElimStorePlain]: treesize reduction 9, result has 79.5 percent of original size [2021-03-10 22:02:17,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:17,736 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:17,755 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-03-10 22:02:17,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:17,756 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:85, output treesize:20 [2021-03-10 22:02:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:17,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:17,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:17,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051111547] [2021-03-10 22:02:17,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:17,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:17,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:17,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:17,829 INFO L87 Difference]: Start difference. First operand 360 states and 1105 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:18,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:18,001 INFO L93 Difference]: Finished difference Result 500 states and 1499 transitions. [2021-03-10 22:02:18,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:18,002 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:18,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:18,003 INFO L225 Difference]: With dead ends: 500 [2021-03-10 22:02:18,003 INFO L226 Difference]: Without dead ends: 500 [2021-03-10 22:02:18,003 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:18,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-03-10 22:02:18,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 347. [2021-03-10 22:02:18,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 3.078034682080925) internal successors, (1065), 346 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:18,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1065 transitions. [2021-03-10 22:02:18,007 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1065 transitions. Word has length 20 [2021-03-10 22:02:18,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:18,008 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 1065 transitions. [2021-03-10 22:02:18,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:18,008 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1065 transitions. [2021-03-10 22:02:18,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:18,008 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:18,008 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:18,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2437,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:18,215 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:18,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:18,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1704872605, now seen corresponding path program 254 times [2021-03-10 22:02:18,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:18,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653471229] [2021-03-10 22:02:18,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:18,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653471229] [2021-03-10 22:02:18,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369922595] [2021-03-10 22:02:18,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:18,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:18,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:18,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:18,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:18,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:18,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:18,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808775718] [2021-03-10 22:02:18,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:18,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:18,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:18,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:18,490 INFO L87 Difference]: Start difference. First operand 347 states and 1065 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:18,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:18,817 INFO L93 Difference]: Finished difference Result 421 states and 1253 transitions. [2021-03-10 22:02:18,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:18,818 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:18,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:18,818 INFO L225 Difference]: With dead ends: 421 [2021-03-10 22:02:18,819 INFO L226 Difference]: Without dead ends: 421 [2021-03-10 22:02:18,819 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 321.0ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:18,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-03-10 22:02:18,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 354. [2021-03-10 22:02:18,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.093484419263456) internal successors, (1092), 353 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:18,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1092 transitions. [2021-03-10 22:02:18,822 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1092 transitions. Word has length 20 [2021-03-10 22:02:18,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:18,822 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 1092 transitions. [2021-03-10 22:02:18,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:18,823 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1092 transitions. [2021-03-10 22:02:18,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:18,823 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:18,823 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:19,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2450,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:19,035 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:19,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:19,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1096186969, now seen corresponding path program 255 times [2021-03-10 22:02:19,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:19,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54632026] [2021-03-10 22:02:19,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:19,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54632026] [2021-03-10 22:02:19,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526419472] [2021-03-10 22:02:19,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:19,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:02:19,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:19,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:19,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:19,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:19,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:19,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:19,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763997452] [2021-03-10 22:02:19,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:19,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:19,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:19,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:19,299 INFO L87 Difference]: Start difference. First operand 354 states and 1092 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:19,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:19,583 INFO L93 Difference]: Finished difference Result 427 states and 1260 transitions. [2021-03-10 22:02:19,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:19,589 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:19,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:19,590 INFO L225 Difference]: With dead ends: 427 [2021-03-10 22:02:19,590 INFO L226 Difference]: Without dead ends: 421 [2021-03-10 22:02:19,590 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 305.3ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:19,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-03-10 22:02:19,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 351. [2021-03-10 22:02:19,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.0885714285714285) internal successors, (1081), 350 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:19,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1081 transitions. [2021-03-10 22:02:19,594 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1081 transitions. Word has length 20 [2021-03-10 22:02:19,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:19,594 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 1081 transitions. [2021-03-10 22:02:19,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:19,594 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1081 transitions. [2021-03-10 22:02:19,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:19,595 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:19,595 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:19,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2463 [2021-03-10 22:02:19,798 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:19,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:19,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1634042547, now seen corresponding path program 256 times [2021-03-10 22:02:19,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:19,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528546911] [2021-03-10 22:02:19,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:19,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528546911] [2021-03-10 22:02:19,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270556478] [2021-03-10 22:02:19,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:19,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:02:19,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:19,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:19,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:20,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:20,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:02:20,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335534771] [2021-03-10 22:02:20,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:02:20,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:20,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:02:20,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:02:20,045 INFO L87 Difference]: Start difference. First operand 351 states and 1081 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:20,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:20,411 INFO L93 Difference]: Finished difference Result 391 states and 1178 transitions. [2021-03-10 22:02:20,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:20,411 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:20,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:20,412 INFO L225 Difference]: With dead ends: 391 [2021-03-10 22:02:20,412 INFO L226 Difference]: Without dead ends: 379 [2021-03-10 22:02:20,412 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 380.1ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:20,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-03-10 22:02:20,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 348. [2021-03-10 22:02:20,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.0835734870317) internal successors, (1070), 347 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:20,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1070 transitions. [2021-03-10 22:02:20,416 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1070 transitions. Word has length 20 [2021-03-10 22:02:20,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:20,416 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 1070 transitions. [2021-03-10 22:02:20,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:20,416 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1070 transitions. [2021-03-10 22:02:20,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:20,416 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:20,417 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:20,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2478 [2021-03-10 22:02:20,617 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:20,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:20,617 INFO L82 PathProgramCache]: Analyzing trace with hash 113704493, now seen corresponding path program 257 times [2021-03-10 22:02:20,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:20,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502265621] [2021-03-10 22:02:20,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:20,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502265621] [2021-03-10 22:02:20,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057829004] [2021-03-10 22:02:20,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:20,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:20,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:20,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:20,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:20,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:20,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:20,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:20,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517529049] [2021-03-10 22:02:20,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:20,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:20,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:20,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:20,863 INFO L87 Difference]: Start difference. First operand 348 states and 1070 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:21,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:21,073 INFO L93 Difference]: Finished difference Result 505 states and 1463 transitions. [2021-03-10 22:02:21,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:21,073 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:21,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:21,074 INFO L225 Difference]: With dead ends: 505 [2021-03-10 22:02:21,074 INFO L226 Difference]: Without dead ends: 505 [2021-03-10 22:02:21,074 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 229.9ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:21,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-03-10 22:02:21,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 356. [2021-03-10 22:02:21,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.1154929577464787) internal successors, (1106), 355 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:21,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1106 transitions. [2021-03-10 22:02:21,078 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1106 transitions. Word has length 20 [2021-03-10 22:02:21,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:21,079 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 1106 transitions. [2021-03-10 22:02:21,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:21,079 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1106 transitions. [2021-03-10 22:02:21,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:21,079 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:21,079 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:21,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2489,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:21,280 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:21,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:21,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1380203229, now seen corresponding path program 258 times [2021-03-10 22:02:21,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:21,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293528010] [2021-03-10 22:02:21,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:21,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293528010] [2021-03-10 22:02:21,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844450006] [2021-03-10 22:02:21,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:21,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:02:21,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:21,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:21,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:21,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:21,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:21,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:21,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931901967] [2021-03-10 22:02:21,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:21,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:21,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:21,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:21,529 INFO L87 Difference]: Start difference. First operand 356 states and 1106 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:21,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:21,778 INFO L93 Difference]: Finished difference Result 511 states and 1464 transitions. [2021-03-10 22:02:21,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:21,778 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:21,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:21,779 INFO L225 Difference]: With dead ends: 511 [2021-03-10 22:02:21,779 INFO L226 Difference]: Without dead ends: 505 [2021-03-10 22:02:21,779 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 233.0ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:21,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-03-10 22:02:21,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 359. [2021-03-10 22:02:21,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.094972067039106) internal successors, (1108), 358 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:21,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1108 transitions. [2021-03-10 22:02:21,784 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1108 transitions. Word has length 20 [2021-03-10 22:02:21,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:21,784 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 1108 transitions. [2021-03-10 22:02:21,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:21,784 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1108 transitions. [2021-03-10 22:02:21,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:21,785 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:21,785 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:21,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2498 [2021-03-10 22:02:21,985 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:21,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:21,985 INFO L82 PathProgramCache]: Analyzing trace with hash 865104931, now seen corresponding path program 259 times [2021-03-10 22:02:21,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:21,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241822145] [2021-03-10 22:02:21,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:22,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241822145] [2021-03-10 22:02:22,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906304640] [2021-03-10 22:02:22,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:22,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:22,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:22,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:22,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:22,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448586109] [2021-03-10 22:02:22,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:22,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:22,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:22,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:22,250 INFO L87 Difference]: Start difference. First operand 359 states and 1108 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:22,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:22,482 INFO L93 Difference]: Finished difference Result 473 states and 1384 transitions. [2021-03-10 22:02:22,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:22,482 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:22,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:22,483 INFO L225 Difference]: With dead ends: 473 [2021-03-10 22:02:22,483 INFO L226 Difference]: Without dead ends: 473 [2021-03-10 22:02:22,483 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 235.0ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:22,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-03-10 22:02:22,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 352. [2021-03-10 22:02:22,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.1054131054131053) internal successors, (1090), 351 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:22,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1090 transitions. [2021-03-10 22:02:22,487 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1090 transitions. Word has length 20 [2021-03-10 22:02:22,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:22,488 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 1090 transitions. [2021-03-10 22:02:22,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:22,488 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1090 transitions. [2021-03-10 22:02:22,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:22,488 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:22,488 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:22,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2507,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:22,689 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:22,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:22,689 INFO L82 PathProgramCache]: Analyzing trace with hash -2137519965, now seen corresponding path program 260 times [2021-03-10 22:02:22,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:22,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397473223] [2021-03-10 22:02:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:22,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397473223] [2021-03-10 22:02:22,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406021749] [2021-03-10 22:02:22,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:22,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:22,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:22,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:22,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:22,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:22,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:22,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859702998] [2021-03-10 22:02:22,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:22,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:22,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:22,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:22,961 INFO L87 Difference]: Start difference. First operand 352 states and 1090 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:23,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:23,176 INFO L93 Difference]: Finished difference Result 436 states and 1302 transitions. [2021-03-10 22:02:23,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:23,177 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:23,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:23,177 INFO L225 Difference]: With dead ends: 436 [2021-03-10 22:02:23,178 INFO L226 Difference]: Without dead ends: 436 [2021-03-10 22:02:23,178 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 241.9ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:23,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-03-10 22:02:23,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 349. [2021-03-10 22:02:23,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.089080459770115) internal successors, (1075), 348 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:23,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1075 transitions. [2021-03-10 22:02:23,182 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1075 transitions. Word has length 20 [2021-03-10 22:02:23,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:23,182 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 1075 transitions. [2021-03-10 22:02:23,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:23,182 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1075 transitions. [2021-03-10 22:02:23,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:23,183 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:23,183 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:23,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2519,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:23,383 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:23,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:23,383 INFO L82 PathProgramCache]: Analyzing trace with hash 885841459, now seen corresponding path program 261 times [2021-03-10 22:02:23,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:23,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400343479] [2021-03-10 22:02:23,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:23,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400343479] [2021-03-10 22:02:23,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636433129] [2021-03-10 22:02:23,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:23,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:02:23,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:23,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:23,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:23,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:23,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:23,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064282328] [2021-03-10 22:02:23,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:23,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:23,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:23,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:23,640 INFO L87 Difference]: Start difference. First operand 349 states and 1075 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:23,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:23,882 INFO L93 Difference]: Finished difference Result 473 states and 1376 transitions. [2021-03-10 22:02:23,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:23,882 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:23,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:23,883 INFO L225 Difference]: With dead ends: 473 [2021-03-10 22:02:23,883 INFO L226 Difference]: Without dead ends: 467 [2021-03-10 22:02:23,883 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 244.8ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:23,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-03-10 22:02:23,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 359. [2021-03-10 22:02:23,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.078212290502793) internal successors, (1102), 358 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1102 transitions. [2021-03-10 22:02:23,887 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1102 transitions. Word has length 20 [2021-03-10 22:02:23,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:23,887 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 1102 transitions. [2021-03-10 22:02:23,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:23,887 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1102 transitions. [2021-03-10 22:02:23,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:23,888 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:23,888 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:24,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2526 [2021-03-10 22:02:24,088 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:24,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:24,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1029582467, now seen corresponding path program 262 times [2021-03-10 22:02:24,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:24,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820063136] [2021-03-10 22:02:24,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:24,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820063136] [2021-03-10 22:02:24,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185274117] [2021-03-10 22:02:24,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:24,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:02:24,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:24,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:24,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:24,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:24,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:24,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766445067] [2021-03-10 22:02:24,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:24,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:24,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:24,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:24,350 INFO L87 Difference]: Start difference. First operand 359 states and 1102 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:24,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:24,563 INFO L93 Difference]: Finished difference Result 450 states and 1337 transitions. [2021-03-10 22:02:24,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:24,563 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:24,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:24,564 INFO L225 Difference]: With dead ends: 450 [2021-03-10 22:02:24,564 INFO L226 Difference]: Without dead ends: 450 [2021-03-10 22:02:24,564 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 244.8ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:24,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-03-10 22:02:24,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 348. [2021-03-10 22:02:24,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.0835734870317) internal successors, (1070), 347 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:24,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1070 transitions. [2021-03-10 22:02:24,568 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1070 transitions. Word has length 20 [2021-03-10 22:02:24,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:24,568 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 1070 transitions. [2021-03-10 22:02:24,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:24,569 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1070 transitions. [2021-03-10 22:02:24,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:24,569 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:24,569 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:24,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2538,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:24,779 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:24,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:24,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1133016157, now seen corresponding path program 263 times [2021-03-10 22:02:24,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:24,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556729410] [2021-03-10 22:02:24,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:24,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556729410] [2021-03-10 22:02:24,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556431324] [2021-03-10 22:02:24,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:24,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:24,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:24,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:24,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:25,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:25,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:02:25,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591879960] [2021-03-10 22:02:25,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:02:25,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:25,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:02:25,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:02:25,028 INFO L87 Difference]: Start difference. First operand 348 states and 1070 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:25,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:25,344 INFO L93 Difference]: Finished difference Result 382 states and 1154 transitions. [2021-03-10 22:02:25,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:25,345 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:25,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:25,345 INFO L225 Difference]: With dead ends: 382 [2021-03-10 22:02:25,345 INFO L226 Difference]: Without dead ends: 370 [2021-03-10 22:02:25,345 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 352.5ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:25,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-03-10 22:02:25,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 350. [2021-03-10 22:02:25,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.0802292263610314) internal successors, (1075), 349 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:25,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1075 transitions. [2021-03-10 22:02:25,349 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1075 transitions. Word has length 20 [2021-03-10 22:02:25,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:25,349 INFO L480 AbstractCegarLoop]: Abstraction has 350 states and 1075 transitions. [2021-03-10 22:02:25,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:25,349 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1075 transitions. [2021-03-10 22:02:25,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:25,350 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:25,350 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:25,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2546 [2021-03-10 22:02:25,550 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:25,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:25,550 INFO L82 PathProgramCache]: Analyzing trace with hash -381615719, now seen corresponding path program 264 times [2021-03-10 22:02:25,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:25,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240208127] [2021-03-10 22:02:25,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:25,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:25,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:25,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240208127] [2021-03-10 22:02:25,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747880296] [2021-03-10 22:02:25,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:25,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:02:25,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:25,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:25,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:25,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:25,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:25,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762404454] [2021-03-10 22:02:25,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:25,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:25,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:25,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:25,838 INFO L87 Difference]: Start difference. First operand 350 states and 1075 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:26,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:26,096 INFO L93 Difference]: Finished difference Result 407 states and 1206 transitions. [2021-03-10 22:02:26,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:26,097 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:26,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:26,097 INFO L225 Difference]: With dead ends: 407 [2021-03-10 22:02:26,097 INFO L226 Difference]: Without dead ends: 401 [2021-03-10 22:02:26,097 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 304.2ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:26,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-03-10 22:02:26,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 360. [2021-03-10 22:02:26,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.0696378830083564) internal successors, (1102), 359 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:26,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1102 transitions. [2021-03-10 22:02:26,101 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1102 transitions. Word has length 20 [2021-03-10 22:02:26,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:26,101 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 1102 transitions. [2021-03-10 22:02:26,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:26,101 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1102 transitions. [2021-03-10 22:02:26,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:26,102 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:26,102 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:26,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2556,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:26,302 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:26,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:26,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1997927651, now seen corresponding path program 265 times [2021-03-10 22:02:26,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:26,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533931594] [2021-03-10 22:02:26,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:26,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533931594] [2021-03-10 22:02:26,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414063319] [2021-03-10 22:02:26,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:26,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:26,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:26,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:26,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:26,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:26,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374173961] [2021-03-10 22:02:26,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:26,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:26,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:26,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:26,558 INFO L87 Difference]: Start difference. First operand 360 states and 1102 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:26,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:26,848 INFO L93 Difference]: Finished difference Result 378 states and 1152 transitions. [2021-03-10 22:02:26,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:26,849 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:26,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:26,849 INFO L225 Difference]: With dead ends: 378 [2021-03-10 22:02:26,849 INFO L226 Difference]: Without dead ends: 378 [2021-03-10 22:02:26,849 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 305.3ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:26,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-03-10 22:02:26,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 345. [2021-03-10 22:02:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.072674418604651) internal successors, (1057), 344 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:26,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1057 transitions. [2021-03-10 22:02:26,853 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1057 transitions. Word has length 20 [2021-03-10 22:02:26,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:26,853 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 1057 transitions. [2021-03-10 22:02:26,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:26,853 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1057 transitions. [2021-03-10 22:02:26,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:26,854 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:26,854 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:27,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2562 [2021-03-10 22:02:27,054 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:27,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:27,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1330647072, now seen corresponding path program 266 times [2021-03-10 22:02:27,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:27,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023471143] [2021-03-10 22:02:27,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:27,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:27,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:27,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023471143] [2021-03-10 22:02:27,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68741983] [2021-03-10 22:02:27,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:27,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:27,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:27,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:27,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:27,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:27,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:27,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:27,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:27,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:27,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:27,277 INFO L628 ElimStorePlain]: treesize reduction 14, result has 72.0 percent of original size [2021-03-10 22:02:27,277 INFO L518 ElimStorePlain]: Eliminatee v_prenex_82 vanished before elimination [2021-03-10 22:02:27,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:27,280 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:27,301 INFO L628 ElimStorePlain]: treesize reduction 10, result has 66.7 percent of original size [2021-03-10 22:02:27,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:27,302 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:81, output treesize:20 [2021-03-10 22:02:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:27,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:27,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:02:27,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231636799] [2021-03-10 22:02:27,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:27,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:27,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:27,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:27,362 INFO L87 Difference]: Start difference. First operand 345 states and 1057 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:27,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:27,650 INFO L93 Difference]: Finished difference Result 502 states and 1434 transitions. [2021-03-10 22:02:27,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:27,651 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:27,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:27,651 INFO L225 Difference]: With dead ends: 502 [2021-03-10 22:02:27,651 INFO L226 Difference]: Without dead ends: 450 [2021-03-10 22:02:27,652 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 248.0ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:02:27,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-03-10 22:02:27,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 340. [2021-03-10 22:02:27,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0442477876106193) internal successors, (1032), 339 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:27,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1032 transitions. [2021-03-10 22:02:27,656 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1032 transitions. Word has length 20 [2021-03-10 22:02:27,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:27,656 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 1032 transitions. [2021-03-10 22:02:27,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:27,656 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1032 transitions. [2021-03-10 22:02:27,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:27,656 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:27,656 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:27,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2569 [2021-03-10 22:02:27,857 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:27,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:27,857 INFO L82 PathProgramCache]: Analyzing trace with hash -769808317, now seen corresponding path program 267 times [2021-03-10 22:02:27,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:27,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510822436] [2021-03-10 22:02:27,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:27,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510822436] [2021-03-10 22:02:27,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804521436] [2021-03-10 22:02:27,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:27,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:02:27,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:27,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:27,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:28,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:28,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:28,062 INFO L628 ElimStorePlain]: treesize reduction 12, result has 81.3 percent of original size [2021-03-10 22:02:28,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:28,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:28,095 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-03-10 22:02:28,095 INFO L518 ElimStorePlain]: Eliminatee v_prenex_84 vanished before elimination [2021-03-10 22:02:28,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:28,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:28,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:28,100 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:28,118 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:02:28,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:28,119 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-03-10 22:02:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:28,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:28,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:28,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508008615] [2021-03-10 22:02:28,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:28,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:28,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:28,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:28,158 INFO L87 Difference]: Start difference. First operand 340 states and 1032 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:28,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:28,338 INFO L93 Difference]: Finished difference Result 506 states and 1477 transitions. [2021-03-10 22:02:28,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:28,338 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:28,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:28,339 INFO L225 Difference]: With dead ends: 506 [2021-03-10 22:02:28,339 INFO L226 Difference]: Without dead ends: 506 [2021-03-10 22:02:28,339 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 126.9ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:28,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-03-10 22:02:28,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 354. [2021-03-10 22:02:28,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.0623229461756374) internal successors, (1081), 353 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:28,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1081 transitions. [2021-03-10 22:02:28,343 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1081 transitions. Word has length 20 [2021-03-10 22:02:28,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:28,343 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 1081 transitions. [2021-03-10 22:02:28,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:28,343 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1081 transitions. [2021-03-10 22:02:28,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:28,344 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:28,344 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:28,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2578,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:28,551 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:28,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:28,551 INFO L82 PathProgramCache]: Analyzing trace with hash 388835213, now seen corresponding path program 268 times [2021-03-10 22:02:28,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:28,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355824889] [2021-03-10 22:02:28,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:28,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355824889] [2021-03-10 22:02:28,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990852515] [2021-03-10 22:02:28,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:28,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:02:28,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:28,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:28,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:28,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:28,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:28,759 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-03-10 22:02:28,760 INFO L518 ElimStorePlain]: Eliminatee v_prenex_89 vanished before elimination [2021-03-10 22:02:28,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:28,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:28,793 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-03-10 22:02:28,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:28,796 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:28,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:28,798 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:28,816 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:02:28,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:28,817 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-03-10 22:02:28,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:28,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:28,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:02:28,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892262359] [2021-03-10 22:02:28,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:02:28,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:28,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:02:28,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:02:28,861 INFO L87 Difference]: Start difference. First operand 354 states and 1081 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:29,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:29,110 INFO L93 Difference]: Finished difference Result 558 states and 1598 transitions. [2021-03-10 22:02:29,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:02:29,111 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:29,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:29,112 INFO L225 Difference]: With dead ends: 558 [2021-03-10 22:02:29,112 INFO L226 Difference]: Without dead ends: 558 [2021-03-10 22:02:29,112 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 208.0ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:29,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-03-10 22:02:29,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 360. [2021-03-10 22:02:29,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.0807799442896937) internal successors, (1106), 359 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:29,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1106 transitions. [2021-03-10 22:02:29,116 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1106 transitions. Word has length 20 [2021-03-10 22:02:29,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:29,116 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 1106 transitions. [2021-03-10 22:02:29,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:29,117 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1106 transitions. [2021-03-10 22:02:29,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:29,117 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:29,117 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:29,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2588 [2021-03-10 22:02:29,318 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:29,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:29,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1105072509, now seen corresponding path program 269 times [2021-03-10 22:02:29,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:29,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589124265] [2021-03-10 22:02:29,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:29,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589124265] [2021-03-10 22:02:29,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153866609] [2021-03-10 22:02:29,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:29,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:02:29,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:29,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:02:29,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:29,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:29,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:29,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:29,476 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:29,478 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:29,479 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:29,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:29,482 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:29,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:29,485 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:29,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:29,488 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:29,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:29,491 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:29,493 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:29,494 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:29,532 INFO L628 ElimStorePlain]: treesize reduction 29, result has 57.4 percent of original size [2021-03-10 22:02:29,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:02:29,533 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:175, output treesize:39 [2021-03-10 22:02:29,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:29,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:29,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:02:29,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040385211] [2021-03-10 22:02:29,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:02:29,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:29,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:02:29,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:29,651 INFO L87 Difference]: Start difference. First operand 360 states and 1106 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:29,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:29,986 INFO L93 Difference]: Finished difference Result 515 states and 1489 transitions. [2021-03-10 22:02:29,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:29,986 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:29,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:29,987 INFO L225 Difference]: With dead ends: 515 [2021-03-10 22:02:29,987 INFO L226 Difference]: Without dead ends: 509 [2021-03-10 22:02:29,987 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 303.7ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:02:29,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-03-10 22:02:29,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 358. [2021-03-10 22:02:29,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.0672268907563027) internal successors, (1095), 357 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:29,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1095 transitions. [2021-03-10 22:02:29,991 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1095 transitions. Word has length 20 [2021-03-10 22:02:29,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:29,991 INFO L480 AbstractCegarLoop]: Abstraction has 358 states and 1095 transitions. [2021-03-10 22:02:29,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:29,991 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1095 transitions. [2021-03-10 22:02:29,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:29,992 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:29,992 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:30,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2600,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:30,192 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:30,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:30,193 INFO L82 PathProgramCache]: Analyzing trace with hash -359295832, now seen corresponding path program 270 times [2021-03-10 22:02:30,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:30,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047406880] [2021-03-10 22:02:30,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:30,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047406880] [2021-03-10 22:02:30,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457049104] [2021-03-10 22:02:30,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:30,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:02:30,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:30,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:30,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:30,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:30,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:30,364 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:30,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:30,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:30,368 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:30,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:30,370 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:30,390 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-03-10 22:02:30,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:30,391 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-03-10 22:02:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:30,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:30,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:02:30,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431058058] [2021-03-10 22:02:30,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:30,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:30,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:30,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:30,448 INFO L87 Difference]: Start difference. First operand 358 states and 1095 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:30,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:30,777 INFO L93 Difference]: Finished difference Result 514 states and 1478 transitions. [2021-03-10 22:02:30,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:02:30,778 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:30,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:30,779 INFO L225 Difference]: With dead ends: 514 [2021-03-10 22:02:30,779 INFO L226 Difference]: Without dead ends: 452 [2021-03-10 22:02:30,779 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 288.5ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:02:30,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-03-10 22:02:30,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 355. [2021-03-10 22:02:30,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.0451977401129944) internal successors, (1078), 354 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:30,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1078 transitions. [2021-03-10 22:02:30,783 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1078 transitions. Word has length 20 [2021-03-10 22:02:30,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:30,783 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1078 transitions. [2021-03-10 22:02:30,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:30,783 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1078 transitions. [2021-03-10 22:02:30,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:30,784 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:30,784 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:30,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2615 [2021-03-10 22:02:30,984 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:30,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:30,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1048768781, now seen corresponding path program 271 times [2021-03-10 22:02:30,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:30,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181170700] [2021-03-10 22:02:30,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:31,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181170700] [2021-03-10 22:02:31,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091998712] [2021-03-10 22:02:31,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:31,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:31,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:31,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:31,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:31,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:31,151 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:31,174 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-03-10 22:02:31,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:31,177 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:31,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:31,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:31,186 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-03-10 22:02:31,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:31,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:31,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:02:31,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754882524] [2021-03-10 22:02:31,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:02:31,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:31,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:02:31,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:02:31,239 INFO L87 Difference]: Start difference. First operand 355 states and 1078 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:31,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:31,440 INFO L93 Difference]: Finished difference Result 614 states and 1772 transitions. [2021-03-10 22:02:31,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:02:31,440 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:31,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:31,441 INFO L225 Difference]: With dead ends: 614 [2021-03-10 22:02:31,441 INFO L226 Difference]: Without dead ends: 614 [2021-03-10 22:02:31,441 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:02:31,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-03-10 22:02:31,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 361. [2021-03-10 22:02:31,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 3.061111111111111) internal successors, (1102), 360 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:31,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1102 transitions. [2021-03-10 22:02:31,446 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1102 transitions. Word has length 20 [2021-03-10 22:02:31,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:31,446 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 1102 transitions. [2021-03-10 22:02:31,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:31,446 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1102 transitions. [2021-03-10 22:02:31,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:31,447 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:31,447 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:31,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2629,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:31,647 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:31,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:31,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1613147123, now seen corresponding path program 272 times [2021-03-10 22:02:31,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:31,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078390398] [2021-03-10 22:02:31,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:31,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078390398] [2021-03-10 22:02:31,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438273701] [2021-03-10 22:02:31,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:31,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:31,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:31,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:31,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:31,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:31,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:31,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:31,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:31,862 INFO L628 ElimStorePlain]: treesize reduction 3, result has 94.0 percent of original size [2021-03-10 22:02:31,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:31,865 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:31,885 INFO L628 ElimStorePlain]: treesize reduction 21, result has 48.8 percent of original size [2021-03-10 22:02:31,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_91 vanished before elimination [2021-03-10 22:02:31,885 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:02:31,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:31,885 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-03-10 22:02:31,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:31,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:31,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:02:31,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525479224] [2021-03-10 22:02:31,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:02:31,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:31,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:02:31,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:02:31,934 INFO L87 Difference]: Start difference. First operand 361 states and 1102 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:32,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:32,088 INFO L93 Difference]: Finished difference Result 581 states and 1690 transitions. [2021-03-10 22:02:32,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:32,089 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:32,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:32,090 INFO L225 Difference]: With dead ends: 581 [2021-03-10 22:02:32,090 INFO L226 Difference]: Without dead ends: 581 [2021-03-10 22:02:32,090 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:02:32,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-03-10 22:02:32,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 364. [2021-03-10 22:02:32,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 3.077134986225895) internal successors, (1117), 363 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:32,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1117 transitions. [2021-03-10 22:02:32,095 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1117 transitions. Word has length 20 [2021-03-10 22:02:32,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:32,095 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 1117 transitions. [2021-03-10 22:02:32,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:32,095 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1117 transitions. [2021-03-10 22:02:32,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:32,096 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:32,096 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:32,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2638,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:32,296 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:32,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:32,296 INFO L82 PathProgramCache]: Analyzing trace with hash 724683217, now seen corresponding path program 273 times [2021-03-10 22:02:32,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:32,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986726231] [2021-03-10 22:02:32,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:32,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986726231] [2021-03-10 22:02:32,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321377259] [2021-03-10 22:02:32,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:32,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:02:32,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:32,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:32,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:32,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:32,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:32,499 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-03-10 22:02:32,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:32,502 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:32,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:32,505 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:32,527 INFO L628 ElimStorePlain]: treesize reduction 7, result has 79.4 percent of original size [2021-03-10 22:02:32,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:32,530 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:32,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:32,538 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:02:32,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:32,539 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-03-10 22:02:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:32,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:32,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:02:32,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520716304] [2021-03-10 22:02:32,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:02:32,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:32,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:02:32,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:02:32,586 INFO L87 Difference]: Start difference. First operand 364 states and 1117 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:32,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:32,723 INFO L93 Difference]: Finished difference Result 548 states and 1613 transitions. [2021-03-10 22:02:32,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:32,723 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:32,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:32,724 INFO L225 Difference]: With dead ends: 548 [2021-03-10 22:02:32,724 INFO L226 Difference]: Without dead ends: 548 [2021-03-10 22:02:32,724 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:02:32,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-03-10 22:02:32,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 355. [2021-03-10 22:02:32,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.0451977401129944) internal successors, (1078), 354 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1078 transitions. [2021-03-10 22:02:32,728 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1078 transitions. Word has length 20 [2021-03-10 22:02:32,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:32,728 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 1078 transitions. [2021-03-10 22:02:32,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:32,728 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1078 transitions. [2021-03-10 22:02:32,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:32,729 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:32,729 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:32,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2649 [2021-03-10 22:02:32,929 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:32,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:32,929 INFO L82 PathProgramCache]: Analyzing trace with hash 2013633307, now seen corresponding path program 274 times [2021-03-10 22:02:32,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:32,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355049609] [2021-03-10 22:02:32,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:32,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355049609] [2021-03-10 22:02:32,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913828013] [2021-03-10 22:02:32,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:33,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:02:33,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:33,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:33,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:33,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:33,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:33,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:33,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:33,147 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-03-10 22:02:33,147 INFO L518 ElimStorePlain]: Eliminatee v_prenex_97 vanished before elimination [2021-03-10 22:02:33,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:33,150 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:33,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:33,153 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:33,173 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-03-10 22:02:33,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:33,173 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:20 [2021-03-10 22:02:33,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:33,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:33,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:33,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259334404] [2021-03-10 22:02:33,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:33,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:33,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:33,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:33,248 INFO L87 Difference]: Start difference. First operand 355 states and 1078 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:33,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:33,582 INFO L93 Difference]: Finished difference Result 681 states and 1904 transitions. [2021-03-10 22:02:33,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:02:33,582 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:33,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:33,584 INFO L225 Difference]: With dead ends: 681 [2021-03-10 22:02:33,584 INFO L226 Difference]: Without dead ends: 681 [2021-03-10 22:02:33,584 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 296.2ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:02:33,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-03-10 22:02:33,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 363. [2021-03-10 22:02:33,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.0773480662983426) internal successors, (1114), 362 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:33,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1114 transitions. [2021-03-10 22:02:33,589 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1114 transitions. Word has length 20 [2021-03-10 22:02:33,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:33,589 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 1114 transitions. [2021-03-10 22:02:33,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:33,589 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1114 transitions. [2021-03-10 22:02:33,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:33,590 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:33,590 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:33,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2658,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:33,790 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:33,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:33,790 INFO L82 PathProgramCache]: Analyzing trace with hash 519725585, now seen corresponding path program 275 times [2021-03-10 22:02:33,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:33,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508724343] [2021-03-10 22:02:33,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:33,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508724343] [2021-03-10 22:02:33,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966025136] [2021-03-10 22:02:33,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:33,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:02:33,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:33,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:02:33,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:33,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:33,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:33,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:33,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:33,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:33,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:33,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:33,962 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:33,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:33,965 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:33,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:33,969 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:33,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:33,972 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:33,974 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:33,974 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:34,015 INFO L628 ElimStorePlain]: treesize reduction 44, result has 47.0 percent of original size [2021-03-10 22:02:34,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:02:34,016 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:169, output treesize:39 [2021-03-10 22:02:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:34,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:34,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:02:34,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107813183] [2021-03-10 22:02:34,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:02:34,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:34,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:02:34,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:34,165 INFO L87 Difference]: Start difference. First operand 363 states and 1114 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:34,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:34,553 INFO L93 Difference]: Finished difference Result 615 states and 1750 transitions. [2021-03-10 22:02:34,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:34,554 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:34,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:34,554 INFO L225 Difference]: With dead ends: 615 [2021-03-10 22:02:34,554 INFO L226 Difference]: Without dead ends: 609 [2021-03-10 22:02:34,555 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 377.2ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:02:34,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-03-10 22:02:34,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 357. [2021-03-10 22:02:34,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.058988764044944) internal successors, (1089), 356 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:34,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1089 transitions. [2021-03-10 22:02:34,559 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1089 transitions. Word has length 20 [2021-03-10 22:02:34,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:34,559 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 1089 transitions. [2021-03-10 22:02:34,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:34,559 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1089 transitions. [2021-03-10 22:02:34,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:34,560 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:34,560 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:34,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2671,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:34,760 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:34,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:34,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1529933551, now seen corresponding path program 276 times [2021-03-10 22:02:34,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:34,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648330161] [2021-03-10 22:02:34,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:34,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:34,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648330161] [2021-03-10 22:02:34,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102678869] [2021-03-10 22:02:34,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:34,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:02:34,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:34,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:02:34,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:34,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:34,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:34,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:34,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:34,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:34,931 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:34,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:34,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:34,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:34,937 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:34,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:34,940 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:34,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:34,943 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:34,945 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:34,946 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:34,986 INFO L628 ElimStorePlain]: treesize reduction 44, result has 47.0 percent of original size [2021-03-10 22:02:34,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:02:34,987 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:169, output treesize:39 [2021-03-10 22:02:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:35,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:35,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:02:35,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249523334] [2021-03-10 22:02:35,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:02:35,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:35,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:02:35,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:35,142 INFO L87 Difference]: Start difference. First operand 357 states and 1089 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:35,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:35,542 INFO L93 Difference]: Finished difference Result 640 states and 1839 transitions. [2021-03-10 22:02:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:35,542 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:35,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:35,543 INFO L225 Difference]: With dead ends: 640 [2021-03-10 22:02:35,543 INFO L226 Difference]: Without dead ends: 640 [2021-03-10 22:02:35,544 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 384.1ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:02:35,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-03-10 22:02:35,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 360. [2021-03-10 22:02:35,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.0752089136490253) internal successors, (1104), 359 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:35,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1104 transitions. [2021-03-10 22:02:35,548 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1104 transitions. Word has length 20 [2021-03-10 22:02:35,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:35,549 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 1104 transitions. [2021-03-10 22:02:35,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:35,549 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1104 transitions. [2021-03-10 22:02:35,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:35,549 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:35,549 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:35,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2688,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:35,750 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:35,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:35,750 INFO L82 PathProgramCache]: Analyzing trace with hash -237591151, now seen corresponding path program 277 times [2021-03-10 22:02:35,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:35,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218580532] [2021-03-10 22:02:35,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:35,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:35,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218580532] [2021-03-10 22:02:35,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312758816] [2021-03-10 22:02:35,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:35,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:35,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:35,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:35,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:35,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:35,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:35,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:35,959 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:35,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:35,989 INFO L628 ElimStorePlain]: treesize reduction 3, result has 92.3 percent of original size [2021-03-10 22:02:35,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:35,992 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:36,011 INFO L628 ElimStorePlain]: treesize reduction 10, result has 66.7 percent of original size [2021-03-10 22:02:36,011 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:02:36,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:36,012 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-03-10 22:02:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:36,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:36,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:36,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425128491] [2021-03-10 22:02:36,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:36,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:36,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:36,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:36,089 INFO L87 Difference]: Start difference. First operand 360 states and 1104 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:36,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:36,304 INFO L93 Difference]: Finished difference Result 609 states and 1772 transitions. [2021-03-10 22:02:36,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:36,304 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:36,305 INFO L225 Difference]: With dead ends: 609 [2021-03-10 22:02:36,305 INFO L226 Difference]: Without dead ends: 609 [2021-03-10 22:02:36,305 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 204.0ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:36,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-03-10 22:02:36,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 357. [2021-03-10 22:02:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.058988764044944) internal successors, (1089), 356 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:36,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1089 transitions. [2021-03-10 22:02:36,310 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1089 transitions. Word has length 20 [2021-03-10 22:02:36,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:36,310 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 1089 transitions. [2021-03-10 22:02:36,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:36,310 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1089 transitions. [2021-03-10 22:02:36,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:36,311 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:36,311 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:36,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2702,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:36,511 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:36,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:36,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1509197023, now seen corresponding path program 278 times [2021-03-10 22:02:36,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:36,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287090139] [2021-03-10 22:02:36,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:36,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287090139] [2021-03-10 22:02:36,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609992813] [2021-03-10 22:02:36,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:36,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:36,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:36,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:36,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:36,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:36,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:36,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:36,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:36,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:36,725 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-03-10 22:02:36,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:36,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:36,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:36,730 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:36,748 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:02:36,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:36,748 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-03-10 22:02:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:36,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:36,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:36,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121706205] [2021-03-10 22:02:36,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:36,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:36,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:36,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:36,824 INFO L87 Difference]: Start difference. First operand 357 states and 1089 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:37,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:37,041 INFO L93 Difference]: Finished difference Result 563 states and 1619 transitions. [2021-03-10 22:02:37,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:37,042 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:37,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:37,043 INFO L225 Difference]: With dead ends: 563 [2021-03-10 22:02:37,043 INFO L226 Difference]: Without dead ends: 557 [2021-03-10 22:02:37,043 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:37,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-03-10 22:02:37,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 361. [2021-03-10 22:02:37,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 3.063888888888889) internal successors, (1103), 360 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:37,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1103 transitions. [2021-03-10 22:02:37,047 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1103 transitions. Word has length 20 [2021-03-10 22:02:37,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:37,047 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 1103 transitions. [2021-03-10 22:02:37,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:37,047 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1103 transitions. [2021-03-10 22:02:37,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:37,048 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:37,048 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:37,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2712 [2021-03-10 22:02:37,248 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:37,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:37,249 INFO L82 PathProgramCache]: Analyzing trace with hash 870346347, now seen corresponding path program 279 times [2021-03-10 22:02:37,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:37,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231631878] [2021-03-10 22:02:37,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:37,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:37,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231631878] [2021-03-10 22:02:37,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054238376] [2021-03-10 22:02:37,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:37,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:02:37,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:37,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:37,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:37,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:37,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:37,479 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-03-10 22:02:37,479 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:02:37,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:02:37,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:37,512 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-03-10 22:02:37,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:37,515 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:37,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:37,517 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:37,535 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:02:37,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:37,536 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-03-10 22:02:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:37,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:37,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:37,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225200046] [2021-03-10 22:02:37,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:37,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:37,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:37,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:37,610 INFO L87 Difference]: Start difference. First operand 361 states and 1103 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:37,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:37,847 INFO L93 Difference]: Finished difference Result 569 states and 1640 transitions. [2021-03-10 22:02:37,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:02:37,847 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:37,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:37,848 INFO L225 Difference]: With dead ends: 569 [2021-03-10 22:02:37,848 INFO L226 Difference]: Without dead ends: 569 [2021-03-10 22:02:37,848 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 222.7ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:37,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-03-10 22:02:37,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 356. [2021-03-10 22:02:37,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.056338028169014) internal successors, (1085), 355 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:37,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1085 transitions. [2021-03-10 22:02:37,853 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1085 transitions. Word has length 20 [2021-03-10 22:02:37,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:37,853 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 1085 transitions. [2021-03-10 22:02:37,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:37,853 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1085 transitions. [2021-03-10 22:02:37,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:37,853 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:37,854 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:38,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2723,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:38,054 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:38,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:38,054 INFO L82 PathProgramCache]: Analyzing trace with hash -346867124, now seen corresponding path program 280 times [2021-03-10 22:02:38,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:38,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109951658] [2021-03-10 22:02:38,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:38,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:38,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109951658] [2021-03-10 22:02:38,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903680688] [2021-03-10 22:02:38,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:38,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:02:38,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:38,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:38,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:38,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:38,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:38,215 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:38,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:38,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:02:38,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:02:38,218 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:6 [2021-03-10 22:02:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:38,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:38,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-10 22:02:38,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276503359] [2021-03-10 22:02:38,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:38,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:38,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:38,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:38,256 INFO L87 Difference]: Start difference. First operand 356 states and 1085 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:38,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:38,478 INFO L93 Difference]: Finished difference Result 421 states and 1235 transitions. [2021-03-10 22:02:38,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:38,478 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:38,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:38,479 INFO L225 Difference]: With dead ends: 421 [2021-03-10 22:02:38,479 INFO L226 Difference]: Without dead ends: 338 [2021-03-10 22:02:38,479 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:02:38,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-03-10 22:02:38,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 332. [2021-03-10 22:02:38,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 3.0362537764350455) internal successors, (1005), 331 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:38,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1005 transitions. [2021-03-10 22:02:38,482 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1005 transitions. Word has length 20 [2021-03-10 22:02:38,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:38,482 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 1005 transitions. [2021-03-10 22:02:38,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:38,482 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1005 transitions. [2021-03-10 22:02:38,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:38,483 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:38,483 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:38,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2733 [2021-03-10 22:02:38,683 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:38,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:38,683 INFO L82 PathProgramCache]: Analyzing trace with hash -12009309, now seen corresponding path program 281 times [2021-03-10 22:02:38,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:38,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890657578] [2021-03-10 22:02:38,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:38,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890657578] [2021-03-10 22:02:38,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585204908] [2021-03-10 22:02:38,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:38,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:02:38,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:38,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:02:38,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:38,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:02:38,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:38,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:02:38,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:38,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:02:38,865 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:38,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:38,878 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:38,913 INFO L628 ElimStorePlain]: treesize reduction 21, result has 59.6 percent of original size [2021-03-10 22:02:38,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:38,914 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:95, output treesize:31 [2021-03-10 22:02:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:38,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:38,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:02:38,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807784689] [2021-03-10 22:02:38,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:02:38,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:38,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:02:38,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:38,999 INFO L87 Difference]: Start difference. First operand 332 states and 1005 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:39,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:39,310 INFO L93 Difference]: Finished difference Result 469 states and 1387 transitions. [2021-03-10 22:02:39,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:39,310 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:39,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:39,311 INFO L225 Difference]: With dead ends: 469 [2021-03-10 22:02:39,311 INFO L226 Difference]: Without dead ends: 469 [2021-03-10 22:02:39,311 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 234.8ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:02:39,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-03-10 22:02:39,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 335. [2021-03-10 22:02:39,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.0269461077844313) internal successors, (1011), 334 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:39,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1011 transitions. [2021-03-10 22:02:39,315 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1011 transitions. Word has length 20 [2021-03-10 22:02:39,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:39,315 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 1011 transitions. [2021-03-10 22:02:39,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:39,316 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1011 transitions. [2021-03-10 22:02:39,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:39,316 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:39,316 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:39,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2741 [2021-03-10 22:02:39,516 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:39,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:39,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1621042083, now seen corresponding path program 282 times [2021-03-10 22:02:39,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:39,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499923147] [2021-03-10 22:02:39,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:39,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:39,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:39,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499923147] [2021-03-10 22:02:39,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403802589] [2021-03-10 22:02:39,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:39,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:02:39,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:39,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:39,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:39,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:39,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:39,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:39,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:39,699 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 22:02:39,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:02:39,700 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 22:02:39,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:39,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:39,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:02:39,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065476789] [2021-03-10 22:02:39,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:02:39,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:39,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:02:39,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:02:39,733 INFO L87 Difference]: Start difference. First operand 335 states and 1011 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:39,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:39,870 INFO L93 Difference]: Finished difference Result 473 states and 1379 transitions. [2021-03-10 22:02:39,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:39,871 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:39,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:39,872 INFO L225 Difference]: With dead ends: 473 [2021-03-10 22:02:39,872 INFO L226 Difference]: Without dead ends: 473 [2021-03-10 22:02:39,872 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:02:39,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-03-10 22:02:39,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 334. [2021-03-10 22:02:39,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 3.021021021021021) internal successors, (1006), 333 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:39,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1006 transitions. [2021-03-10 22:02:39,876 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1006 transitions. Word has length 20 [2021-03-10 22:02:39,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:39,876 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 1006 transitions. [2021-03-10 22:02:39,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:39,876 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1006 transitions. [2021-03-10 22:02:39,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:39,877 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:39,877 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:40,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2754 [2021-03-10 22:02:40,077 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:40,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:40,077 INFO L82 PathProgramCache]: Analyzing trace with hash -336094873, now seen corresponding path program 283 times [2021-03-10 22:02:40,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:40,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072807049] [2021-03-10 22:02:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:40,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072807049] [2021-03-10 22:02:40,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403629438] [2021-03-10 22:02:40,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:40,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:40,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:40,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:40,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:40,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:40,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:40,261 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 22:02:40,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:02:40,261 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 22:02:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:40,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:40,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:40,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991866848] [2021-03-10 22:02:40,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:40,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:40,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:40,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:40,313 INFO L87 Difference]: Start difference. First operand 334 states and 1006 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:40,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:40,474 INFO L93 Difference]: Finished difference Result 430 states and 1282 transitions. [2021-03-10 22:02:40,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:40,474 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:40,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:40,475 INFO L225 Difference]: With dead ends: 430 [2021-03-10 22:02:40,475 INFO L226 Difference]: Without dead ends: 430 [2021-03-10 22:02:40,475 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:40,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-03-10 22:02:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 317. [2021-03-10 22:02:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.990506329113924) internal successors, (945), 316 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 945 transitions. [2021-03-10 22:02:40,479 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 945 transitions. Word has length 20 [2021-03-10 22:02:40,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:40,479 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 945 transitions. [2021-03-10 22:02:40,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:40,479 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 945 transitions. [2021-03-10 22:02:40,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:40,480 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:40,480 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:40,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2760 [2021-03-10 22:02:40,680 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:40,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:40,680 INFO L82 PathProgramCache]: Analyzing trace with hash 284238669, now seen corresponding path program 284 times [2021-03-10 22:02:40,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:40,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135333759] [2021-03-10 22:02:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:40,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135333759] [2021-03-10 22:02:40,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188279577] [2021-03-10 22:02:40,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:40,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:40,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:40,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:40,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:40,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:40,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:40,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827934632] [2021-03-10 22:02:40,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:40,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:40,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:40,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:40,885 INFO L87 Difference]: Start difference. First operand 317 states and 945 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:41,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:41,004 INFO L93 Difference]: Finished difference Result 383 states and 1124 transitions. [2021-03-10 22:02:41,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:41,004 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:41,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:41,005 INFO L225 Difference]: With dead ends: 383 [2021-03-10 22:02:41,005 INFO L226 Difference]: Without dead ends: 383 [2021-03-10 22:02:41,005 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:41,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-03-10 22:02:41,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 323. [2021-03-10 22:02:41,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.018633540372671) internal successors, (972), 322 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:41,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 972 transitions. [2021-03-10 22:02:41,008 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 972 transitions. Word has length 20 [2021-03-10 22:02:41,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:41,009 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 972 transitions. [2021-03-10 22:02:41,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:41,009 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 972 transitions. [2021-03-10 22:02:41,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:41,009 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:41,009 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:41,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2766,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:41,210 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:41,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:41,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1672898287, now seen corresponding path program 285 times [2021-03-10 22:02:41,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:41,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268845264] [2021-03-10 22:02:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:41,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268845264] [2021-03-10 22:02:41,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071081924] [2021-03-10 22:02:41,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:41,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:02:41,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:41,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:02:41,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:41,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:41,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:41,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:41,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:41,400 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:41,401 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:41,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:41,403 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:41,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:41,406 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:41,436 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.0 percent of original size [2021-03-10 22:02:41,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:41,437 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:113, output treesize:38 [2021-03-10 22:02:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:41,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:41,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:02:41,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979484278] [2021-03-10 22:02:41,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:02:41,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:41,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:02:41,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:41,509 INFO L87 Difference]: Start difference. First operand 323 states and 972 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:41,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:41,882 INFO L93 Difference]: Finished difference Result 389 states and 1139 transitions. [2021-03-10 22:02:41,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:02:41,883 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:41,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:41,883 INFO L225 Difference]: With dead ends: 389 [2021-03-10 22:02:41,883 INFO L226 Difference]: Without dead ends: 389 [2021-03-10 22:02:41,883 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 277.5ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:02:41,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-03-10 22:02:41,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 320. [2021-03-10 22:02:41,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.0) internal successors, (957), 319 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:41,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 957 transitions. [2021-03-10 22:02:41,887 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 957 transitions. Word has length 20 [2021-03-10 22:02:41,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:41,887 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 957 transitions. [2021-03-10 22:02:41,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:41,888 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 957 transitions. [2021-03-10 22:02:41,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:41,888 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:41,888 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:42,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2771 [2021-03-10 22:02:42,088 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:42,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:42,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1670272511, now seen corresponding path program 286 times [2021-03-10 22:02:42,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:42,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947737617] [2021-03-10 22:02:42,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:42,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947737617] [2021-03-10 22:02:42,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634052932] [2021-03-10 22:02:42,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:42,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:02:42,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:42,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:42,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:42,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:42,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:42,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92586772] [2021-03-10 22:02:42,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:42,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:42,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:42,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:42,285 INFO L87 Difference]: Start difference. First operand 320 states and 957 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:42,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:42,443 INFO L93 Difference]: Finished difference Result 347 states and 1032 transitions. [2021-03-10 22:02:42,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:42,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:42,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:42,444 INFO L225 Difference]: With dead ends: 347 [2021-03-10 22:02:42,444 INFO L226 Difference]: Without dead ends: 347 [2021-03-10 22:02:42,444 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:42,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-03-10 22:02:42,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 311. [2021-03-10 22:02:42,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.990322580645161) internal successors, (927), 310 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:42,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 927 transitions. [2021-03-10 22:02:42,448 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 927 transitions. Word has length 20 [2021-03-10 22:02:42,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:42,448 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 927 transitions. [2021-03-10 22:02:42,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:42,448 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 927 transitions. [2021-03-10 22:02:42,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:42,448 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:42,448 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:42,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2783,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:42,649 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:42,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:42,649 INFO L82 PathProgramCache]: Analyzing trace with hash 528543981, now seen corresponding path program 287 times [2021-03-10 22:02:42,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:42,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946835734] [2021-03-10 22:02:42,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:42,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946835734] [2021-03-10 22:02:42,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665618277] [2021-03-10 22:02:42,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:42,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:02:42,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:42,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:02:42,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:42,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:42,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:42,828 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:42,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:42,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:42,832 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:42,834 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:42,835 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:42,837 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:42,837 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:42,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:42,840 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:42,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:42,844 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:42,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:42,846 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:42,891 INFO L628 ElimStorePlain]: treesize reduction 21, result has 70.0 percent of original size [2021-03-10 22:02:42,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:02:42,893 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:177, output treesize:49 [2021-03-10 22:02:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:42,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:42,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:02:42,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217828355] [2021-03-10 22:02:42,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:02:42,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:42,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:02:42,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:42,996 INFO L87 Difference]: Start difference. First operand 311 states and 927 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:43,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:43,435 INFO L93 Difference]: Finished difference Result 521 states and 1462 transitions. [2021-03-10 22:02:43,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:02:43,435 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:43,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:43,436 INFO L225 Difference]: With dead ends: 521 [2021-03-10 22:02:43,436 INFO L226 Difference]: Without dead ends: 521 [2021-03-10 22:02:43,436 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 395.8ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:02:43,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-03-10 22:02:43,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 321. [2021-03-10 22:02:43,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 3.0375) internal successors, (972), 320 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:43,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 972 transitions. [2021-03-10 22:02:43,440 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 972 transitions. Word has length 20 [2021-03-10 22:02:43,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:43,440 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 972 transitions. [2021-03-10 22:02:43,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:43,440 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 972 transitions. [2021-03-10 22:02:43,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:43,441 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:43,441 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:43,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2786 [2021-03-10 22:02:43,641 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:43,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:43,641 INFO L82 PathProgramCache]: Analyzing trace with hash -965363741, now seen corresponding path program 288 times [2021-03-10 22:02:43,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:43,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376155424] [2021-03-10 22:02:43,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:43,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376155424] [2021-03-10 22:02:43,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372075314] [2021-03-10 22:02:43,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:43,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:02:43,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:43,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:43,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:43,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:43,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:43,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927021878] [2021-03-10 22:02:43,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:43,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:43,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:43,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:43,890 INFO L87 Difference]: Start difference. First operand 321 states and 972 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:44,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:44,045 INFO L93 Difference]: Finished difference Result 455 states and 1308 transitions. [2021-03-10 22:02:44,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:44,046 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:44,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:44,046 INFO L225 Difference]: With dead ends: 455 [2021-03-10 22:02:44,047 INFO L226 Difference]: Without dead ends: 449 [2021-03-10 22:02:44,047 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 182.0ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:44,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-03-10 22:02:44,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 324. [2021-03-10 22:02:44,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.015479876160991) internal successors, (974), 323 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:44,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 974 transitions. [2021-03-10 22:02:44,050 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 974 transitions. Word has length 20 [2021-03-10 22:02:44,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:44,051 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 974 transitions. [2021-03-10 22:02:44,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:44,051 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 974 transitions. [2021-03-10 22:02:44,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:44,051 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:44,051 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:44,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2799,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:44,251 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:44,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:44,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1279944419, now seen corresponding path program 289 times [2021-03-10 22:02:44,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:44,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098815506] [2021-03-10 22:02:44,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:44,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098815506] [2021-03-10 22:02:44,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33280891] [2021-03-10 22:02:44,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:44,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:44,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:44,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:44,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:44,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679022583] [2021-03-10 22:02:44,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:44,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:44,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:44,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:44,470 INFO L87 Difference]: Start difference. First operand 324 states and 974 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:44,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:44,745 INFO L93 Difference]: Finished difference Result 526 states and 1506 transitions. [2021-03-10 22:02:44,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:02:44,745 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:44,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:44,746 INFO L225 Difference]: With dead ends: 526 [2021-03-10 22:02:44,746 INFO L226 Difference]: Without dead ends: 526 [2021-03-10 22:02:44,746 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:44,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-03-10 22:02:44,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 327. [2021-03-10 22:02:44,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 3.0337423312883436) internal successors, (989), 326 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:44,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 989 transitions. [2021-03-10 22:02:44,751 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 989 transitions. Word has length 20 [2021-03-10 22:02:44,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:44,751 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 989 transitions. [2021-03-10 22:02:44,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:44,751 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 989 transitions. [2021-03-10 22:02:44,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:44,751 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:44,751 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:44,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2805,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:44,952 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:44,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:44,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1722680477, now seen corresponding path program 290 times [2021-03-10 22:02:44,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:44,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977431679] [2021-03-10 22:02:44,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:45,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:45,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977431679] [2021-03-10 22:02:45,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734468709] [2021-03-10 22:02:45,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:45,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:45,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:45,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:45,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:45,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:45,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:45,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234684708] [2021-03-10 22:02:45,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:45,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:45,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:45,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:45,183 INFO L87 Difference]: Start difference. First operand 327 states and 989 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:45,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:45,433 INFO L93 Difference]: Finished difference Result 495 states and 1439 transitions. [2021-03-10 22:02:45,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:02:45,434 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:45,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:45,434 INFO L225 Difference]: With dead ends: 495 [2021-03-10 22:02:45,435 INFO L226 Difference]: Without dead ends: 495 [2021-03-10 22:02:45,435 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 208.7ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:45,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-03-10 22:02:45,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 324. [2021-03-10 22:02:45,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.015479876160991) internal successors, (974), 323 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 974 transitions. [2021-03-10 22:02:45,439 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 974 transitions. Word has length 20 [2021-03-10 22:02:45,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:45,439 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 974 transitions. [2021-03-10 22:02:45,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:45,439 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 974 transitions. [2021-03-10 22:02:45,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:45,439 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:45,439 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:45,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2813,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:45,640 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:45,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:45,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1300680947, now seen corresponding path program 291 times [2021-03-10 22:02:45,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:45,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178210638] [2021-03-10 22:02:45,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:45,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178210638] [2021-03-10 22:02:45,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828814433] [2021-03-10 22:02:45,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:45,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:02:45,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:45,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:45,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:45,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:45,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:45,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422529885] [2021-03-10 22:02:45,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:45,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:45,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:45,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:45,885 INFO L87 Difference]: Start difference. First operand 324 states and 974 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:46,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:46,178 INFO L93 Difference]: Finished difference Result 492 states and 1387 transitions. [2021-03-10 22:02:46,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:02:46,179 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:46,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:46,180 INFO L225 Difference]: With dead ends: 492 [2021-03-10 22:02:46,180 INFO L226 Difference]: Without dead ends: 486 [2021-03-10 22:02:46,180 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 233.7ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:02:46,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-03-10 22:02:46,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 328. [2021-03-10 22:02:46,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 3.021406727828746) internal successors, (988), 327 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:46,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 988 transitions. [2021-03-10 22:02:46,184 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 988 transitions. Word has length 20 [2021-03-10 22:02:46,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:46,184 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 988 transitions. [2021-03-10 22:02:46,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:46,184 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 988 transitions. [2021-03-10 22:02:46,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:46,184 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:46,185 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:46,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2822 [2021-03-10 22:02:46,385 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:46,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:46,385 INFO L82 PathProgramCache]: Analyzing trace with hash -614742979, now seen corresponding path program 292 times [2021-03-10 22:02:46,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:46,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020496418] [2021-03-10 22:02:46,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:46,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:46,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020496418] [2021-03-10 22:02:46,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112816715] [2021-03-10 22:02:46,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:46,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:02:46,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:46,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:46,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:46,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:46,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:46,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274002491] [2021-03-10 22:02:46,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:46,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:46,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:46,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:46,647 INFO L87 Difference]: Start difference. First operand 328 states and 988 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:46,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:46,979 INFO L93 Difference]: Finished difference Result 498 states and 1408 transitions. [2021-03-10 22:02:46,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:02:46,980 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:46,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:46,980 INFO L225 Difference]: With dead ends: 498 [2021-03-10 22:02:46,980 INFO L226 Difference]: Without dead ends: 498 [2021-03-10 22:02:46,980 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 296.4ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:02:46,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-03-10 22:02:46,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 325. [2021-03-10 22:02:46,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 3.0185185185185186) internal successors, (978), 324 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:46,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 978 transitions. [2021-03-10 22:02:46,985 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 978 transitions. Word has length 20 [2021-03-10 22:02:46,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:46,985 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 978 transitions. [2021-03-10 22:02:46,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:46,985 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 978 transitions. [2021-03-10 22:02:46,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:46,985 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:46,985 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:47,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2830,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:47,186 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:47,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:47,186 INFO L82 PathProgramCache]: Analyzing trace with hash -832484211, now seen corresponding path program 293 times [2021-03-10 22:02:47,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:47,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527374676] [2021-03-10 22:02:47,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:47,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527374676] [2021-03-10 22:02:47,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725720306] [2021-03-10 22:02:47,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:47,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:02:47,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:47,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:02:47,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:47,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:47,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:47,383 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:47,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:47,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:47,387 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:47,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:47,390 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:47,391 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:47,392 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:47,394 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:47,395 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:47,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:47,397 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:47,428 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.0 percent of original size [2021-03-10 22:02:47,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:02:47,429 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:167, output treesize:38 [2021-03-10 22:02:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:47,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:47,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:02:47,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910823023] [2021-03-10 22:02:47,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:02:47,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:47,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:02:47,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:02:47,510 INFO L87 Difference]: Start difference. First operand 325 states and 978 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:47,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:47,844 INFO L93 Difference]: Finished difference Result 431 states and 1265 transitions. [2021-03-10 22:02:47,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:47,845 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:47,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:47,846 INFO L225 Difference]: With dead ends: 431 [2021-03-10 22:02:47,846 INFO L226 Difference]: Without dead ends: 431 [2021-03-10 22:02:47,846 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 281.9ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:02:47,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-03-10 22:02:47,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 326. [2021-03-10 22:02:47,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.0153846153846153) internal successors, (980), 325 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:47,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 980 transitions. [2021-03-10 22:02:47,850 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 980 transitions. Word has length 20 [2021-03-10 22:02:47,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:47,850 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 980 transitions. [2021-03-10 22:02:47,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:47,850 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 980 transitions. [2021-03-10 22:02:47,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:47,850 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:47,850 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:48,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2838,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:48,051 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:48,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:48,051 INFO L82 PathProgramCache]: Analyzing trace with hash 459858189, now seen corresponding path program 294 times [2021-03-10 22:02:48,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:48,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634870065] [2021-03-10 22:02:48,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:48,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634870065] [2021-03-10 22:02:48,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252230436] [2021-03-10 22:02:48,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:48,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:02:48,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:48,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:48,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:48,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:48,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:48,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996924526] [2021-03-10 22:02:48,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:48,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:48,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:48,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:48,287 INFO L87 Difference]: Start difference. First operand 326 states and 980 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:48,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:48,445 INFO L93 Difference]: Finished difference Result 425 states and 1247 transitions. [2021-03-10 22:02:48,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:48,446 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:48,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:48,447 INFO L225 Difference]: With dead ends: 425 [2021-03-10 22:02:48,447 INFO L226 Difference]: Without dead ends: 425 [2021-03-10 22:02:48,447 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:48,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-03-10 22:02:48,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 315. [2021-03-10 22:02:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.0031847133757963) internal successors, (943), 314 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:48,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 943 transitions. [2021-03-10 22:02:48,450 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 943 transitions. Word has length 20 [2021-03-10 22:02:48,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:48,450 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 943 transitions. [2021-03-10 22:02:48,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:48,450 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 943 transitions. [2021-03-10 22:02:48,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:48,451 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:48,451 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:48,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2850 [2021-03-10 22:02:48,652 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:48,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:48,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1436006847, now seen corresponding path program 295 times [2021-03-10 22:02:48,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:48,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459719032] [2021-03-10 22:02:48,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:48,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459719032] [2021-03-10 22:02:48,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134080259] [2021-03-10 22:02:48,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:48,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:48,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:48,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:48,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:48,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:48,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302137425] [2021-03-10 22:02:48,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:48,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:48,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:48,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:48,864 INFO L87 Difference]: Start difference. First operand 315 states and 943 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:49,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:49,045 INFO L93 Difference]: Finished difference Result 386 states and 1140 transitions. [2021-03-10 22:02:49,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:49,045 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:49,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:49,046 INFO L225 Difference]: With dead ends: 386 [2021-03-10 22:02:49,046 INFO L226 Difference]: Without dead ends: 386 [2021-03-10 22:02:49,046 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 171.4ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:49,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-03-10 22:02:49,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 312. [2021-03-10 22:02:49,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9935691318327975) internal successors, (931), 311 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:49,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 931 transitions. [2021-03-10 22:02:49,050 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 931 transitions. Word has length 20 [2021-03-10 22:02:49,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:49,050 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 931 transitions. [2021-03-10 22:02:49,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:49,050 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 931 transitions. [2021-03-10 22:02:49,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:49,050 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:49,050 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:49,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2857,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:49,251 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:49,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:49,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2079204861, now seen corresponding path program 296 times [2021-03-10 22:02:49,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:49,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142245051] [2021-03-10 22:02:49,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:49,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:49,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142245051] [2021-03-10 22:02:49,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371063850] [2021-03-10 22:02:49,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:49,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:49,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:49,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:49,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:49,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:49,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:49,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:49,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350484752] [2021-03-10 22:02:49,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:49,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:49,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:49,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:49,498 INFO L87 Difference]: Start difference. First operand 312 states and 931 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:49,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:49,691 INFO L93 Difference]: Finished difference Result 393 states and 1130 transitions. [2021-03-10 22:02:49,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:49,691 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:49,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:49,692 INFO L225 Difference]: With dead ends: 393 [2021-03-10 22:02:49,692 INFO L226 Difference]: Without dead ends: 387 [2021-03-10 22:02:49,692 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 199.8ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:49,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-03-10 22:02:49,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 326. [2021-03-10 22:02:49,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9846153846153847) internal successors, (970), 325 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:49,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 970 transitions. [2021-03-10 22:02:49,696 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 970 transitions. Word has length 20 [2021-03-10 22:02:49,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:49,696 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 970 transitions. [2021-03-10 22:02:49,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:49,696 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 970 transitions. [2021-03-10 22:02:49,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:49,697 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:49,697 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:49,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2862,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:49,897 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:49,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:49,897 INFO L82 PathProgramCache]: Analyzing trace with hash 300338509, now seen corresponding path program 297 times [2021-03-10 22:02:49,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:49,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100617640] [2021-03-10 22:02:49,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:49,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100617640] [2021-03-10 22:02:49,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370929481] [2021-03-10 22:02:49,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:50,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:02:50,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:50,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:50,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:50,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:50,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:50,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862390142] [2021-03-10 22:02:50,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:50,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:50,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:50,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:50,138 INFO L87 Difference]: Start difference. First operand 326 states and 970 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:50,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:50,340 INFO L93 Difference]: Finished difference Result 399 states and 1151 transitions. [2021-03-10 22:02:50,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:02:50,341 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:50,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:50,341 INFO L225 Difference]: With dead ends: 399 [2021-03-10 22:02:50,341 INFO L226 Difference]: Without dead ends: 399 [2021-03-10 22:02:50,342 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 215.3ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:50,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-03-10 22:02:50,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 324. [2021-03-10 22:02:50,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9876160990712073) internal successors, (965), 323 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:50,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 965 transitions. [2021-03-10 22:02:50,345 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 965 transitions. Word has length 20 [2021-03-10 22:02:50,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:50,345 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 965 transitions. [2021-03-10 22:02:50,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:50,346 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 965 transitions. [2021-03-10 22:02:50,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:50,346 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:50,346 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:50,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2869 [2021-03-10 22:02:50,562 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:50,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:50,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1340574307, now seen corresponding path program 298 times [2021-03-10 22:02:50,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:50,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171222268] [2021-03-10 22:02:50,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:50,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171222268] [2021-03-10 22:02:50,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597009855] [2021-03-10 22:02:50,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:50,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:02:50,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:50,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:50,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:50,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:50,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:50,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366186624] [2021-03-10 22:02:50,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:50,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:50,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:50,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:50,770 INFO L87 Difference]: Start difference. First operand 324 states and 965 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:50,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:50,963 INFO L93 Difference]: Finished difference Result 368 states and 1086 transitions. [2021-03-10 22:02:50,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:50,964 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:50,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:50,964 INFO L225 Difference]: With dead ends: 368 [2021-03-10 22:02:50,965 INFO L226 Difference]: Without dead ends: 368 [2021-03-10 22:02:50,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 173.9ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:50,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-03-10 22:02:50,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 309. [2021-03-10 22:02:50,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.99025974025974) internal successors, (921), 308 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:50,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 921 transitions. [2021-03-10 22:02:50,968 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 921 transitions. Word has length 20 [2021-03-10 22:02:50,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:50,968 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 921 transitions. [2021-03-10 22:02:50,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:50,968 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 921 transitions. [2021-03-10 22:02:50,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:50,969 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:50,969 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:51,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2875,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:51,169 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:51,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:51,170 INFO L82 PathProgramCache]: Analyzing trace with hash -498001455, now seen corresponding path program 299 times [2021-03-10 22:02:51,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:51,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389408147] [2021-03-10 22:02:51,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:51,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389408147] [2021-03-10 22:02:51,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734063808] [2021-03-10 22:02:51,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:51,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:51,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:51,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:51,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:51,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:51,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:51,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763650378] [2021-03-10 22:02:51,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:51,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:51,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:51,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:51,478 INFO L87 Difference]: Start difference. First operand 309 states and 921 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:51,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:51,737 INFO L93 Difference]: Finished difference Result 369 states and 1070 transitions. [2021-03-10 22:02:51,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:51,738 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:51,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:51,738 INFO L225 Difference]: With dead ends: 369 [2021-03-10 22:02:51,738 INFO L226 Difference]: Without dead ends: 369 [2021-03-10 22:02:51,739 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 345.8ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:51,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-03-10 22:02:51,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 317. [2021-03-10 22:02:51,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 3.0126582278481013) internal successors, (952), 316 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:51,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 952 transitions. [2021-03-10 22:02:51,742 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 952 transitions. Word has length 20 [2021-03-10 22:02:51,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:51,742 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 952 transitions. [2021-03-10 22:02:51,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:51,742 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 952 transitions. [2021-03-10 22:02:51,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:51,743 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:51,743 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:51,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2879,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:51,943 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:51,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:51,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1991909177, now seen corresponding path program 300 times [2021-03-10 22:02:51,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:51,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982858999] [2021-03-10 22:02:51,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:52,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982858999] [2021-03-10 22:02:52,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696895843] [2021-03-10 22:02:52,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:52,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:02:52,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:52,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:52,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:52,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:52,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:52,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:52,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456848490] [2021-03-10 22:02:52,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:52,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:52,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:52,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:52,211 INFO L87 Difference]: Start difference. First operand 317 states and 952 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:52,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:52,469 INFO L93 Difference]: Finished difference Result 375 states and 1077 transitions. [2021-03-10 22:02:52,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:52,470 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:52,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:52,470 INFO L225 Difference]: With dead ends: 375 [2021-03-10 22:02:52,470 INFO L226 Difference]: Without dead ends: 369 [2021-03-10 22:02:52,471 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 278.6ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:52,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-03-10 22:02:52,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 314. [2021-03-10 22:02:52,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.0063897763578273) internal successors, (941), 313 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:52,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 941 transitions. [2021-03-10 22:02:52,474 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 941 transitions. Word has length 20 [2021-03-10 22:02:52,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:52,474 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 941 transitions. [2021-03-10 22:02:52,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:52,474 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 941 transitions. [2021-03-10 22:02:52,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:52,475 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:52,475 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:52,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2893 [2021-03-10 22:02:52,675 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:52,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:52,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1454053599, now seen corresponding path program 301 times [2021-03-10 22:02:52,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:52,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086868120] [2021-03-10 22:02:52,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:52,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086868120] [2021-03-10 22:02:52,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082305486] [2021-03-10 22:02:52,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:52,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:52,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:52,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:52,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:52,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468443764] [2021-03-10 22:02:52,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:52,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:52,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:52,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:52,971 INFO L87 Difference]: Start difference. First operand 314 states and 941 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:53,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:53,294 INFO L93 Difference]: Finished difference Result 339 states and 995 transitions. [2021-03-10 22:02:53,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:53,294 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:53,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:53,295 INFO L225 Difference]: With dead ends: 339 [2021-03-10 22:02:53,295 INFO L226 Difference]: Without dead ends: 327 [2021-03-10 22:02:53,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 397.5ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:53,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-03-10 22:02:53,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 311. [2021-03-10 22:02:53,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0) internal successors, (930), 310 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:53,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-03-10 22:02:53,299 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-03-10 22:02:53,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:53,299 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-03-10 22:02:53,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:53,299 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-03-10 22:02:53,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:53,300 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:53,300 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:53,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2908 [2021-03-10 22:02:53,500 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:53,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:53,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1320575643, now seen corresponding path program 302 times [2021-03-10 22:02:53,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:53,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37466337] [2021-03-10 22:02:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:53,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37466337] [2021-03-10 22:02:53,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062343195] [2021-03-10 22:02:53,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:53,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:53,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:53,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:53,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:53,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:53,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:53,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100859332] [2021-03-10 22:02:53,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:53,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:53,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:53,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:53,754 INFO L87 Difference]: Start difference. First operand 311 states and 930 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:53,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:53,963 INFO L93 Difference]: Finished difference Result 456 states and 1288 transitions. [2021-03-10 22:02:53,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:53,963 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:53,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:53,964 INFO L225 Difference]: With dead ends: 456 [2021-03-10 22:02:53,964 INFO L226 Difference]: Without dead ends: 456 [2021-03-10 22:02:53,964 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:53,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-03-10 22:02:53,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 319. [2021-03-10 22:02:53,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 3.0377358490566038) internal successors, (966), 318 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:53,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 966 transitions. [2021-03-10 22:02:53,968 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 966 transitions. Word has length 20 [2021-03-10 22:02:53,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:53,969 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 966 transitions. [2021-03-10 22:02:53,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:53,969 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 966 transitions. [2021-03-10 22:02:53,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:53,969 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:53,969 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:54,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2921 [2021-03-10 22:02:54,170 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:54,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:54,170 INFO L82 PathProgramCache]: Analyzing trace with hash -173332079, now seen corresponding path program 303 times [2021-03-10 22:02:54,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:54,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444970192] [2021-03-10 22:02:54,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:54,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444970192] [2021-03-10 22:02:54,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528360818] [2021-03-10 22:02:54,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:54,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:02:54,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:54,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:54,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:54,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:54,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:54,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:54,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388591418] [2021-03-10 22:02:54,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:54,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:54,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:54,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:54,439 INFO L87 Difference]: Start difference. First operand 319 states and 966 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:54,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:54,668 INFO L93 Difference]: Finished difference Result 462 states and 1289 transitions. [2021-03-10 22:02:54,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:54,668 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:54,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:54,669 INFO L225 Difference]: With dead ends: 462 [2021-03-10 22:02:54,669 INFO L226 Difference]: Without dead ends: 456 [2021-03-10 22:02:54,669 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 242.4ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:54,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-03-10 22:02:54,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 322. [2021-03-10 22:02:54,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.015576323987539) internal successors, (968), 321 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:54,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 968 transitions. [2021-03-10 22:02:54,673 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 968 transitions. Word has length 20 [2021-03-10 22:02:54,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:54,673 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 968 transitions. [2021-03-10 22:02:54,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:54,673 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 968 transitions. [2021-03-10 22:02:54,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:54,674 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:54,674 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:54,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2929,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:54,874 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:54,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:54,874 INFO L82 PathProgramCache]: Analyzing trace with hash 2071976081, now seen corresponding path program 304 times [2021-03-10 22:02:54,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:54,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312172340] [2021-03-10 22:02:54,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:54,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312172340] [2021-03-10 22:02:54,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726893472] [2021-03-10 22:02:54,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:55,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:02:55,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:55,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:55,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:55,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:55,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:55,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:55,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46560399] [2021-03-10 22:02:55,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:55,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:55,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:55,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:55,128 INFO L87 Difference]: Start difference. First operand 322 states and 968 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:55,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:55,348 INFO L93 Difference]: Finished difference Result 424 states and 1209 transitions. [2021-03-10 22:02:55,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:55,348 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:55,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:55,349 INFO L225 Difference]: With dead ends: 424 [2021-03-10 22:02:55,349 INFO L226 Difference]: Without dead ends: 424 [2021-03-10 22:02:55,349 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 220.2ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:55,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-03-10 22:02:55,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 315. [2021-03-10 22:02:55,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.0254777070063694) internal successors, (950), 314 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:55,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 950 transitions. [2021-03-10 22:02:55,353 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 950 transitions. Word has length 20 [2021-03-10 22:02:55,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:55,353 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 950 transitions. [2021-03-10 22:02:55,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:55,353 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 950 transitions. [2021-03-10 22:02:55,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:55,354 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:55,354 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:55,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2945 [2021-03-10 22:02:55,554 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:55,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:55,554 INFO L82 PathProgramCache]: Analyzing trace with hash -930648815, now seen corresponding path program 305 times [2021-03-10 22:02:55,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:55,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203620230] [2021-03-10 22:02:55,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:55,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203620230] [2021-03-10 22:02:55,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238209218] [2021-03-10 22:02:55,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:55,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:02:55,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:55,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:55,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:55,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:55,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:55,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937325131] [2021-03-10 22:02:55,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:55,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:55,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:55,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:55,817 INFO L87 Difference]: Start difference. First operand 315 states and 950 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:56,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:56,017 INFO L93 Difference]: Finished difference Result 387 states and 1127 transitions. [2021-03-10 22:02:56,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:56,018 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:56,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:56,018 INFO L225 Difference]: With dead ends: 387 [2021-03-10 22:02:56,018 INFO L226 Difference]: Without dead ends: 387 [2021-03-10 22:02:56,019 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:56,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-03-10 22:02:56,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 312. [2021-03-10 22:02:56,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.0064308681672025) internal successors, (935), 311 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:56,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 935 transitions. [2021-03-10 22:02:56,022 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 935 transitions. Word has length 20 [2021-03-10 22:02:56,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:56,022 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 935 transitions. [2021-03-10 22:02:56,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:56,022 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 935 transitions. [2021-03-10 22:02:56,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:56,023 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:56,023 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:56,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2955,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:56,223 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:56,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:56,224 INFO L82 PathProgramCache]: Analyzing trace with hash 2092712609, now seen corresponding path program 306 times [2021-03-10 22:02:56,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:56,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949600781] [2021-03-10 22:02:56,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:56,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:56,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949600781] [2021-03-10 22:02:56,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176877835] [2021-03-10 22:02:56,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:56,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:02:56,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:56,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:56,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:56,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:56,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:56,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239718197] [2021-03-10 22:02:56,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:56,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:56,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:56,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:56,483 INFO L87 Difference]: Start difference. First operand 312 states and 935 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:56,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:56,702 INFO L93 Difference]: Finished difference Result 424 states and 1201 transitions. [2021-03-10 22:02:56,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:56,703 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:56,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:56,704 INFO L225 Difference]: With dead ends: 424 [2021-03-10 22:02:56,704 INFO L226 Difference]: Without dead ends: 418 [2021-03-10 22:02:56,704 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 247.8ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:56,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-03-10 22:02:56,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 322. [2021-03-10 22:02:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.9968847352024923) internal successors, (962), 321 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:56,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 962 transitions. [2021-03-10 22:02:56,708 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 962 transitions. Word has length 20 [2021-03-10 22:02:56,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:56,708 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 962 transitions. [2021-03-10 22:02:56,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:56,708 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 962 transitions. [2021-03-10 22:02:56,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:56,708 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:56,708 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:56,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2963 [2021-03-10 22:02:56,909 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:56,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:56,909 INFO L82 PathProgramCache]: Analyzing trace with hash 177288683, now seen corresponding path program 307 times [2021-03-10 22:02:56,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:56,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867420513] [2021-03-10 22:02:56,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:56,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867420513] [2021-03-10 22:02:56,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912170978] [2021-03-10 22:02:56,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:57,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:57,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:57,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:57,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:57,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662771379] [2021-03-10 22:02:57,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:57,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:57,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:57,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:57,165 INFO L87 Difference]: Start difference. First operand 322 states and 962 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:57,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:57,395 INFO L93 Difference]: Finished difference Result 401 states and 1162 transitions. [2021-03-10 22:02:57,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:57,395 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:57,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:57,396 INFO L225 Difference]: With dead ends: 401 [2021-03-10 22:02:57,396 INFO L226 Difference]: Without dead ends: 401 [2021-03-10 22:02:57,396 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 247.1ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:57,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-03-10 22:02:57,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 311. [2021-03-10 22:02:57,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0) internal successors, (930), 310 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:57,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-03-10 22:02:57,400 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-03-10 22:02:57,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:57,400 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-03-10 22:02:57,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:57,400 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-03-10 22:02:57,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:57,400 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:57,400 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:57,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2979,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:57,601 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:57,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:57,601 INFO L82 PathProgramCache]: Analyzing trace with hash 73854993, now seen corresponding path program 308 times [2021-03-10 22:02:57,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:57,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618273542] [2021-03-10 22:02:57,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:57,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618273542] [2021-03-10 22:02:57,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613812636] [2021-03-10 22:02:57,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:57,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:02:57,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:57,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:57,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:57,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:57,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:57,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929819152] [2021-03-10 22:02:57,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:57,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:57,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:57,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:57,855 INFO L87 Difference]: Start difference. First operand 311 states and 930 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:58,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:58,143 INFO L93 Difference]: Finished difference Result 341 states and 999 transitions. [2021-03-10 22:02:58,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:58,143 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:58,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:58,144 INFO L225 Difference]: With dead ends: 341 [2021-03-10 22:02:58,144 INFO L226 Difference]: Without dead ends: 329 [2021-03-10 22:02:58,144 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 308.3ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:02:58,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-03-10 22:02:58,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 313. [2021-03-10 22:02:58,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.996794871794872) internal successors, (935), 312 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:58,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 935 transitions. [2021-03-10 22:02:58,147 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 935 transitions. Word has length 20 [2021-03-10 22:02:58,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:58,148 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 935 transitions. [2021-03-10 22:02:58,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 935 transitions. [2021-03-10 22:02:58,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:58,148 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:58,148 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:58,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2987,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:58,349 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:58,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:58,349 INFO L82 PathProgramCache]: Analyzing trace with hash 825255431, now seen corresponding path program 309 times [2021-03-10 22:02:58,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:58,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528632761] [2021-03-10 22:02:58,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:58,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:58,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528632761] [2021-03-10 22:02:58,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161651933] [2021-03-10 22:02:58,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:58,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:02:58,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:58,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:58,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:58,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:58,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:58,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:58,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954580912] [2021-03-10 22:02:58,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:58,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:58,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:58,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:58,603 INFO L87 Difference]: Start difference. First operand 313 states and 935 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:58,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:58,871 INFO L93 Difference]: Finished difference Result 366 states and 1051 transitions. [2021-03-10 22:02:58,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:02:58,871 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:58,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:58,872 INFO L225 Difference]: With dead ends: 366 [2021-03-10 22:02:58,872 INFO L226 Difference]: Without dead ends: 360 [2021-03-10 22:02:58,872 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 310.7ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:02:58,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-03-10 22:02:58,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 323. [2021-03-10 22:02:58,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.987577639751553) internal successors, (962), 322 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 962 transitions. [2021-03-10 22:02:58,876 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 962 transitions. Word has length 20 [2021-03-10 22:02:58,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:58,876 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 962 transitions. [2021-03-10 22:02:58,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:58,876 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 962 transitions. [2021-03-10 22:02:58,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:58,876 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:58,876 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:59,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2999 [2021-03-10 22:02:59,077 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:59,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:59,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1090168495, now seen corresponding path program 310 times [2021-03-10 22:02:59,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:59,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531399115] [2021-03-10 22:02:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:59,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531399115] [2021-03-10 22:02:59,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786727348] [2021-03-10 22:02:59,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:59,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:02:59,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:59,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:02:59,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:59,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:02:59,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:02:59,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326118601] [2021-03-10 22:02:59,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:02:59,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:02:59,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:02:59,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:02:59,339 INFO L87 Difference]: Start difference. First operand 323 states and 962 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:59,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:02:59,544 INFO L93 Difference]: Finished difference Result 337 states and 997 transitions. [2021-03-10 22:02:59,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:02:59,545 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:02:59,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:02:59,545 INFO L225 Difference]: With dead ends: 337 [2021-03-10 22:02:59,545 INFO L226 Difference]: Without dead ends: 337 [2021-03-10 22:02:59,546 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 279.2ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:02:59,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-03-10 22:02:59,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 310. [2021-03-10 22:02:59,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9935275080906147) internal successors, (925), 309 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 925 transitions. [2021-03-10 22:02:59,549 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 925 transitions. Word has length 20 [2021-03-10 22:02:59,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:02:59,549 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 925 transitions. [2021-03-10 22:02:59,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:02:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 925 transitions. [2021-03-10 22:02:59,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:02:59,550 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:02:59,550 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:02:59,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3006,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:59,750 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:02:59,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:02:59,751 INFO L82 PathProgramCache]: Analyzing trace with hash 259797553, now seen corresponding path program 311 times [2021-03-10 22:02:59,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:02:59,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793875946] [2021-03-10 22:02:59,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:02:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:02:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:02:59,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793875946] [2021-03-10 22:02:59,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651580630] [2021-03-10 22:02:59,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:02:59,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:02:59,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:02:59,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:02:59,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:02:59,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:02:59,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,948 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:59,948 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:59,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,954 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:59,955 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,957 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:59,957 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,959 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:59,960 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,962 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:59,963 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:59,966 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:02:59,969 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,971 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:02:59,972 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:02:59,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:02:59,975 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:00,020 INFO L628 ElimStorePlain]: treesize reduction 21, result has 70.0 percent of original size [2021-03-10 22:03:00,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:03:00,021 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:252, output treesize:49 [2021-03-10 22:03:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:00,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:00,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:03:00,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262545568] [2021-03-10 22:03:00,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:03:00,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:00,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:03:00,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:03:00,130 INFO L87 Difference]: Start difference. First operand 310 states and 925 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:00,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:00,591 INFO L93 Difference]: Finished difference Result 466 states and 1302 transitions. [2021-03-10 22:03:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:03:00,592 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:00,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:00,592 INFO L225 Difference]: With dead ends: 466 [2021-03-10 22:03:00,592 INFO L226 Difference]: Without dead ends: 466 [2021-03-10 22:03:00,593 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 425.9ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:03:00,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-03-10 22:03:00,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 320. [2021-03-10 22:03:00,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.040752351097179) internal successors, (970), 319 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:00,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 970 transitions. [2021-03-10 22:03:00,597 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 970 transitions. Word has length 20 [2021-03-10 22:03:00,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:00,597 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 970 transitions. [2021-03-10 22:03:00,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:00,597 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 970 transitions. [2021-03-10 22:03:00,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:00,597 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:00,597 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:00,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3015,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:00,798 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:00,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:00,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1234110169, now seen corresponding path program 312 times [2021-03-10 22:03:00,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:00,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844560905] [2021-03-10 22:03:00,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:00,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844560905] [2021-03-10 22:03:00,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968117866] [2021-03-10 22:03:00,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:00,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:03:00,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:00,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:00,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:01,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:01,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:01,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:01,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405595929] [2021-03-10 22:03:01,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:01,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:01,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:01,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:01,039 INFO L87 Difference]: Start difference. First operand 320 states and 970 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:01,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:01,195 INFO L93 Difference]: Finished difference Result 420 states and 1200 transitions. [2021-03-10 22:03:01,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:01,195 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:01,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:01,196 INFO L225 Difference]: With dead ends: 420 [2021-03-10 22:03:01,196 INFO L226 Difference]: Without dead ends: 414 [2021-03-10 22:03:01,196 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:03:01,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-03-10 22:03:01,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 323. [2021-03-10 22:03:01,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.018633540372671) internal successors, (972), 322 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:01,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 972 transitions. [2021-03-10 22:03:01,201 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 972 transitions. Word has length 20 [2021-03-10 22:03:01,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:01,201 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 972 transitions. [2021-03-10 22:03:01,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:01,201 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 972 transitions. [2021-03-10 22:03:01,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:01,201 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:01,201 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:01,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3029,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:01,402 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:01,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:01,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1011197991, now seen corresponding path program 313 times [2021-03-10 22:03:01,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:01,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973777561] [2021-03-10 22:03:01,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:01,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973777561] [2021-03-10 22:03:01,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178531523] [2021-03-10 22:03:01,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:01,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:01,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:01,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:01,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:01,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:01,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907669539] [2021-03-10 22:03:01,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:01,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:01,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:01,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:01,672 INFO L87 Difference]: Start difference. First operand 323 states and 972 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:01,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:01,840 INFO L93 Difference]: Finished difference Result 472 states and 1342 transitions. [2021-03-10 22:03:01,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:01,841 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:01,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:01,841 INFO L225 Difference]: With dead ends: 472 [2021-03-10 22:03:01,841 INFO L226 Difference]: Without dead ends: 472 [2021-03-10 22:03:01,842 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 184.9ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:03:01,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-03-10 22:03:01,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 326. [2021-03-10 22:03:01,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.036923076923077) internal successors, (987), 325 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:01,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 987 transitions. [2021-03-10 22:03:01,846 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 987 transitions. Word has length 20 [2021-03-10 22:03:01,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:01,846 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 987 transitions. [2021-03-10 22:03:01,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:01,846 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 987 transitions. [2021-03-10 22:03:01,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:01,847 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:01,847 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:02,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3038,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:02,047 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:02,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:02,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1991426905, now seen corresponding path program 314 times [2021-03-10 22:03:02,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:02,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099620881] [2021-03-10 22:03:02,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:02,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099620881] [2021-03-10 22:03:02,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075839152] [2021-03-10 22:03:02,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:02,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:02,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:02,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:02,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:02,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:02,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:02,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028653353] [2021-03-10 22:03:02,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:02,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:02,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:02,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:02,296 INFO L87 Difference]: Start difference. First operand 326 states and 987 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:02,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:02,464 INFO L93 Difference]: Finished difference Result 435 states and 1260 transitions. [2021-03-10 22:03:02,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:02,465 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:02,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:02,466 INFO L225 Difference]: With dead ends: 435 [2021-03-10 22:03:02,466 INFO L226 Difference]: Without dead ends: 435 [2021-03-10 22:03:02,466 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 164.8ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:03:02,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-03-10 22:03:02,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 323. [2021-03-10 22:03:02,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.018633540372671) internal successors, (972), 322 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:02,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 972 transitions. [2021-03-10 22:03:02,470 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 972 transitions. Word has length 20 [2021-03-10 22:03:02,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:02,470 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 972 transitions. [2021-03-10 22:03:02,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:02,470 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 972 transitions. [2021-03-10 22:03:02,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:02,471 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:02,471 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:02,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3050 [2021-03-10 22:03:02,671 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:02,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:02,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1031934519, now seen corresponding path program 315 times [2021-03-10 22:03:02,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:02,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744202349] [2021-03-10 22:03:02,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:02,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744202349] [2021-03-10 22:03:02,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783626712] [2021-03-10 22:03:02,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:02,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:03:02,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:02,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:03:02,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:02,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:02,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:02,866 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:02,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:02,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:03:02,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:02,872 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:02,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:02,875 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:02,876 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:02,878 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:02,878 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:02,881 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:02,881 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:02,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:02,885 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:02,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:03:02,888 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:02,890 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:02,891 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:02,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:02,894 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:02,938 INFO L628 ElimStorePlain]: treesize reduction 21, result has 70.0 percent of original size [2021-03-10 22:03:02,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:03:02,939 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:252, output treesize:49 [2021-03-10 22:03:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:03,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:03,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:03:03,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109768286] [2021-03-10 22:03:03,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:03:03,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:03,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:03:03,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:03:03,039 INFO L87 Difference]: Start difference. First operand 323 states and 972 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:03,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:03,363 INFO L93 Difference]: Finished difference Result 460 states and 1294 transitions. [2021-03-10 22:03:03,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:03,363 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:03,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:03,364 INFO L225 Difference]: With dead ends: 460 [2021-03-10 22:03:03,364 INFO L226 Difference]: Without dead ends: 454 [2021-03-10 22:03:03,364 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 318.6ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:03:03,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-03-10 22:03:03,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 327. [2021-03-10 22:03:03,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 3.0245398773006134) internal successors, (986), 326 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:03,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 986 transitions. [2021-03-10 22:03:03,369 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 986 transitions. Word has length 20 [2021-03-10 22:03:03,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:03,369 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 986 transitions. [2021-03-10 22:03:03,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:03,369 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 986 transitions. [2021-03-10 22:03:03,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:03,369 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:03,369 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:03,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3061 [2021-03-10 22:03:03,570 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:03,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:03,570 INFO L82 PathProgramCache]: Analyzing trace with hash -883489407, now seen corresponding path program 316 times [2021-03-10 22:03:03,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:03,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148065343] [2021-03-10 22:03:03,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:03,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148065343] [2021-03-10 22:03:03,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180401543] [2021-03-10 22:03:03,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:03,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:03,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:03,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:03,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:03,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:03,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:03,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914679644] [2021-03-10 22:03:03,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:03,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:03,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:03,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:03,792 INFO L87 Difference]: Start difference. First operand 327 states and 986 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:03,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:03,976 INFO L93 Difference]: Finished difference Result 466 states and 1315 transitions. [2021-03-10 22:03:03,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:03:03,976 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:03,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:03,977 INFO L225 Difference]: With dead ends: 466 [2021-03-10 22:03:03,977 INFO L226 Difference]: Without dead ends: 466 [2021-03-10 22:03:03,977 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:03,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-03-10 22:03:03,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 324. [2021-03-10 22:03:03,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.021671826625387) internal successors, (976), 323 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:03,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 976 transitions. [2021-03-10 22:03:03,981 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 976 transitions. Word has length 20 [2021-03-10 22:03:03,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:03,982 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 976 transitions. [2021-03-10 22:03:03,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:03,982 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 976 transitions. [2021-03-10 22:03:03,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:03,982 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:03,982 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:04,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3074 [2021-03-10 22:03:04,183 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:04,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:04,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1101230639, now seen corresponding path program 317 times [2021-03-10 22:03:04,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:04,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38071450] [2021-03-10 22:03:04,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:04,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38071450] [2021-03-10 22:03:04,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316440813] [2021-03-10 22:03:04,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:04,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:03:04,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:04,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:03:04,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:04,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:04,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:04,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:03:04,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:04,396 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:04,396 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:04,398 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:04,399 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:04,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:04,401 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:04,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:04,404 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:04,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:04,407 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:04,437 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.0 percent of original size [2021-03-10 22:03:04,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:04,438 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:163, output treesize:38 [2021-03-10 22:03:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:04,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:04,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:03:04,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63132936] [2021-03-10 22:03:04,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:03:04,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:04,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:03:04,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:03:04,521 INFO L87 Difference]: Start difference. First operand 324 states and 976 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:04,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:04,808 INFO L93 Difference]: Finished difference Result 396 states and 1160 transitions. [2021-03-10 22:03:04,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:04,809 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:04,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:04,809 INFO L225 Difference]: With dead ends: 396 [2021-03-10 22:03:04,809 INFO L226 Difference]: Without dead ends: 396 [2021-03-10 22:03:04,810 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 271.9ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:03:04,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-03-10 22:03:04,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 325. [2021-03-10 22:03:04,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 3.0185185185185186) internal successors, (978), 324 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:04,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 978 transitions. [2021-03-10 22:03:04,813 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 978 transitions. Word has length 20 [2021-03-10 22:03:04,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:04,814 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 978 transitions. [2021-03-10 22:03:04,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:04,814 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 978 transitions. [2021-03-10 22:03:04,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:04,814 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:04,814 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:05,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3084 [2021-03-10 22:03:05,015 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:05,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:05,015 INFO L82 PathProgramCache]: Analyzing trace with hash 191111761, now seen corresponding path program 318 times [2021-03-10 22:03:05,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:05,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380380924] [2021-03-10 22:03:05,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:05,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:05,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380380924] [2021-03-10 22:03:05,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741243208] [2021-03-10 22:03:05,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:05,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:03:05,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:05,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:05,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:05,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:05,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:05,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:05,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286570267] [2021-03-10 22:03:05,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:05,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:05,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:05,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:05,241 INFO L87 Difference]: Start difference. First operand 325 states and 978 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:05,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:05,368 INFO L93 Difference]: Finished difference Result 384 states and 1127 transitions. [2021-03-10 22:03:05,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:05,369 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:05,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:05,369 INFO L225 Difference]: With dead ends: 384 [2021-03-10 22:03:05,369 INFO L226 Difference]: Without dead ends: 384 [2021-03-10 22:03:05,369 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 146.7ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:03:05,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-03-10 22:03:05,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 314. [2021-03-10 22:03:05,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.0063897763578273) internal successors, (941), 313 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:05,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 941 transitions. [2021-03-10 22:03:05,373 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 941 transitions. Word has length 20 [2021-03-10 22:03:05,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:05,373 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 941 transitions. [2021-03-10 22:03:05,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:05,373 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 941 transitions. [2021-03-10 22:03:05,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:05,374 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:05,374 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:05,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3098,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:05,574 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:05,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:05,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1704753275, now seen corresponding path program 319 times [2021-03-10 22:03:05,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:05,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215258982] [2021-03-10 22:03:05,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:05,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:05,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215258982] [2021-03-10 22:03:05,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377444921] [2021-03-10 22:03:05,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:05,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:05,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:05,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:05,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:05,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:05,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386144042] [2021-03-10 22:03:05,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:05,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:05,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:05,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:05,821 INFO L87 Difference]: Start difference. First operand 314 states and 941 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:05,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:05,988 INFO L93 Difference]: Finished difference Result 339 states and 1005 transitions. [2021-03-10 22:03:05,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:05,988 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:05,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:05,989 INFO L225 Difference]: With dead ends: 339 [2021-03-10 22:03:05,989 INFO L226 Difference]: Without dead ends: 339 [2021-03-10 22:03:05,989 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 175.4ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:03:05,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-03-10 22:03:05,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 311. [2021-03-10 22:03:05,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.996774193548387) internal successors, (929), 310 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:05,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 929 transitions. [2021-03-10 22:03:05,992 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 929 transitions. Word has length 20 [2021-03-10 22:03:05,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:05,992 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 929 transitions. [2021-03-10 22:03:05,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:05,993 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 929 transitions. [2021-03-10 22:03:05,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:05,993 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:05,993 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:06,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3106 [2021-03-10 22:03:06,193 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:06,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:06,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1947016007, now seen corresponding path program 320 times [2021-03-10 22:03:06,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:06,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709664140] [2021-03-10 22:03:06,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:06,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709664140] [2021-03-10 22:03:06,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507139243] [2021-03-10 22:03:06,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:06,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:06,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:06,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:06,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:06,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:06,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:06,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844795747] [2021-03-10 22:03:06,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:06,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:06,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:06,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:06,432 INFO L87 Difference]: Start difference. First operand 311 states and 929 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:06,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:06,579 INFO L93 Difference]: Finished difference Result 384 states and 1099 transitions. [2021-03-10 22:03:06,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:06,580 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:06,580 INFO L225 Difference]: With dead ends: 384 [2021-03-10 22:03:06,580 INFO L226 Difference]: Without dead ends: 378 [2021-03-10 22:03:06,580 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 175.5ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:03:06,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-03-10 22:03:06,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 325. [2021-03-10 22:03:06,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9876543209876543) internal successors, (968), 324 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:06,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 968 transitions. [2021-03-10 22:03:06,584 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 968 transitions. Word has length 20 [2021-03-10 22:03:06,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:06,584 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 968 transitions. [2021-03-10 22:03:06,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:06,585 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 968 transitions. [2021-03-10 22:03:06,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:06,585 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:06,585 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:06,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3111 [2021-03-10 22:03:06,785 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:06,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:06,786 INFO L82 PathProgramCache]: Analyzing trace with hash 31592081, now seen corresponding path program 321 times [2021-03-10 22:03:06,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:06,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342925815] [2021-03-10 22:03:06,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:06,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342925815] [2021-03-10 22:03:06,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557799651] [2021-03-10 22:03:06,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:06,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:03:06,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:06,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:06,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:07,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:07,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:07,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386471625] [2021-03-10 22:03:07,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:07,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:07,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:07,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:07,024 INFO L87 Difference]: Start difference. First operand 325 states and 968 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:07,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:07,196 INFO L93 Difference]: Finished difference Result 390 states and 1120 transitions. [2021-03-10 22:03:07,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:03:07,197 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:07,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:07,197 INFO L225 Difference]: With dead ends: 390 [2021-03-10 22:03:07,197 INFO L226 Difference]: Without dead ends: 390 [2021-03-10 22:03:07,197 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 182.0ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:03:07,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-03-10 22:03:07,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 323. [2021-03-10 22:03:07,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9906832298136647) internal successors, (963), 322 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:07,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 963 transitions. [2021-03-10 22:03:07,201 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 963 transitions. Word has length 20 [2021-03-10 22:03:07,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:07,201 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 963 transitions. [2021-03-10 22:03:07,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:07,201 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 963 transitions. [2021-03-10 22:03:07,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:07,202 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:07,202 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:07,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3118 [2021-03-10 22:03:07,402 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:07,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:07,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1071827879, now seen corresponding path program 322 times [2021-03-10 22:03:07,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:07,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534651885] [2021-03-10 22:03:07,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:07,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:07,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534651885] [2021-03-10 22:03:07,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27349116] [2021-03-10 22:03:07,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:07,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:07,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:07,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:07,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:07,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:07,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:07,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735762202] [2021-03-10 22:03:07,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:07,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:07,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:07,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:07,655 INFO L87 Difference]: Start difference. First operand 323 states and 963 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:07,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:07,815 INFO L93 Difference]: Finished difference Result 359 states and 1055 transitions. [2021-03-10 22:03:07,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:07,815 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:07,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:07,816 INFO L225 Difference]: With dead ends: 359 [2021-03-10 22:03:07,816 INFO L226 Difference]: Without dead ends: 359 [2021-03-10 22:03:07,816 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:03:07,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-03-10 22:03:07,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 310. [2021-03-10 22:03:07,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9935275080906147) internal successors, (925), 309 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:07,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 925 transitions. [2021-03-10 22:03:07,820 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 925 transitions. Word has length 20 [2021-03-10 22:03:07,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:07,820 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 925 transitions. [2021-03-10 22:03:07,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:07,820 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 925 transitions. [2021-03-10 22:03:07,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:07,820 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:07,820 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:08,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3125,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:08,021 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:08,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:08,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1623389951, now seen corresponding path program 323 times [2021-03-10 22:03:08,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:08,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740758304] [2021-03-10 22:03:08,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:08,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740758304] [2021-03-10 22:03:08,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070437274] [2021-03-10 22:03:08,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:08,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:08,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:08,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:08,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:08,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:08,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:08,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443799149] [2021-03-10 22:03:08,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:08,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:08,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:08,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:08,227 INFO L87 Difference]: Start difference. First operand 310 states and 925 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:08,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:08,372 INFO L93 Difference]: Finished difference Result 329 states and 966 transitions. [2021-03-10 22:03:08,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:08,372 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:08,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:08,373 INFO L225 Difference]: With dead ends: 329 [2021-03-10 22:03:08,373 INFO L226 Difference]: Without dead ends: 317 [2021-03-10 22:03:08,373 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 154.6ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:03:08,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-03-10 22:03:08,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 314. [2021-03-10 22:03:08,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.987220447284345) internal successors, (935), 313 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:08,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 935 transitions. [2021-03-10 22:03:08,376 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 935 transitions. Word has length 20 [2021-03-10 22:03:08,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:08,376 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 935 transitions. [2021-03-10 22:03:08,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:08,376 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 935 transitions. [2021-03-10 22:03:08,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:08,377 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:08,377 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:08,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3133 [2021-03-10 22:03:08,577 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:08,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:08,578 INFO L82 PathProgramCache]: Analyzing trace with hash -871989513, now seen corresponding path program 324 times [2021-03-10 22:03:08,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:08,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411275647] [2021-03-10 22:03:08,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:08,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411275647] [2021-03-10 22:03:08,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518290271] [2021-03-10 22:03:08,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:08,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:03:08,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:08,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:08,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:08,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:08,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:08,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300244482] [2021-03-10 22:03:08,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:08,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:08,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:08,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:08,783 INFO L87 Difference]: Start difference. First operand 314 states and 935 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:08,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:08,933 INFO L93 Difference]: Finished difference Result 354 states and 1018 transitions. [2021-03-10 22:03:08,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:03:08,933 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:08,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:08,934 INFO L225 Difference]: With dead ends: 354 [2021-03-10 22:03:08,934 INFO L226 Difference]: Without dead ends: 348 [2021-03-10 22:03:08,934 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 169.5ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:08,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-03-10 22:03:08,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 324. [2021-03-10 22:03:08,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.978328173374613) internal successors, (962), 323 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 962 transitions. [2021-03-10 22:03:08,938 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 962 transitions. Word has length 20 [2021-03-10 22:03:08,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:08,938 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 962 transitions. [2021-03-10 22:03:08,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:08,938 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 962 transitions. [2021-03-10 22:03:08,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:08,938 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:08,938 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:09,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3139,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:09,139 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:09,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:09,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1507553857, now seen corresponding path program 325 times [2021-03-10 22:03:09,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:09,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474043292] [2021-03-10 22:03:09,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:09,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:09,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474043292] [2021-03-10 22:03:09,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062273498] [2021-03-10 22:03:09,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:09,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:09,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:09,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:09,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:09,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908301044] [2021-03-10 22:03:09,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:09,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:09,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:09,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:09,358 INFO L87 Difference]: Start difference. First operand 324 states and 962 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:09,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:09,493 INFO L93 Difference]: Finished difference Result 325 states and 964 transitions. [2021-03-10 22:03:09,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:09,493 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:09,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:09,494 INFO L225 Difference]: With dead ends: 325 [2021-03-10 22:03:09,494 INFO L226 Difference]: Without dead ends: 325 [2021-03-10 22:03:09,494 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:03:09,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-03-10 22:03:09,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 312. [2021-03-10 22:03:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.990353697749196) internal successors, (930), 311 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:09,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 930 transitions. [2021-03-10 22:03:09,498 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 930 transitions. Word has length 20 [2021-03-10 22:03:09,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:09,498 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 930 transitions. [2021-03-10 22:03:09,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:09,498 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 930 transitions. [2021-03-10 22:03:09,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:09,498 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:09,498 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:09,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3145,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:09,699 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:09,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:09,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1310549153, now seen corresponding path program 326 times [2021-03-10 22:03:09,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:09,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593846413] [2021-03-10 22:03:09,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:09,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:09,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593846413] [2021-03-10 22:03:09,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899926619] [2021-03-10 22:03:09,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:09,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:09,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:09,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:09,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:09,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:09,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:09,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769321522] [2021-03-10 22:03:09,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:09,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:09,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:09,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:09,895 INFO L87 Difference]: Start difference. First operand 312 states and 930 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:10,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:10,036 INFO L93 Difference]: Finished difference Result 360 states and 1033 transitions. [2021-03-10 22:03:10,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:10,037 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:10,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:10,037 INFO L225 Difference]: With dead ends: 360 [2021-03-10 22:03:10,038 INFO L226 Difference]: Without dead ends: 354 [2021-03-10 22:03:10,038 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:03:10,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-03-10 22:03:10,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 326. [2021-03-10 22:03:10,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9815384615384617) internal successors, (969), 325 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:10,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 969 transitions. [2021-03-10 22:03:10,041 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 969 transitions. Word has length 20 [2021-03-10 22:03:10,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:10,041 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 969 transitions. [2021-03-10 22:03:10,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:10,041 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 969 transitions. [2021-03-10 22:03:10,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:10,042 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:10,042 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:10,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3150 [2021-03-10 22:03:10,242 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:10,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:10,243 INFO L82 PathProgramCache]: Analyzing trace with hash -604874773, now seen corresponding path program 327 times [2021-03-10 22:03:10,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:10,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009934433] [2021-03-10 22:03:10,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:10,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009934433] [2021-03-10 22:03:10,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943029822] [2021-03-10 22:03:10,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:10,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:03:10,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:10,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:10,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:10,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:10,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:10,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91437220] [2021-03-10 22:03:10,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:10,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:10,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:10,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:10,453 INFO L87 Difference]: Start difference. First operand 326 states and 969 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:10,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:10,603 INFO L93 Difference]: Finished difference Result 360 states and 1039 transitions. [2021-03-10 22:03:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:03:10,603 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:10,604 INFO L225 Difference]: With dead ends: 360 [2021-03-10 22:03:10,604 INFO L226 Difference]: Without dead ends: 360 [2021-03-10 22:03:10,604 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:03:10,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-03-10 22:03:10,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 324. [2021-03-10 22:03:10,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.984520123839009) internal successors, (964), 323 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:10,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 964 transitions. [2021-03-10 22:03:10,608 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 964 transitions. Word has length 20 [2021-03-10 22:03:10,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:10,608 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 964 transitions. [2021-03-10 22:03:10,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:10,608 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 964 transitions. [2021-03-10 22:03:10,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:10,608 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:10,608 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:10,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3155 [2021-03-10 22:03:10,809 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:10,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:10,809 INFO L82 PathProgramCache]: Analyzing trace with hash 435361025, now seen corresponding path program 328 times [2021-03-10 22:03:10,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:10,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708746231] [2021-03-10 22:03:10,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:10,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:10,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708746231] [2021-03-10 22:03:10,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652765097] [2021-03-10 22:03:10,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:10,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:10,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:10,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:10,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:11,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:11,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:11,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:11,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271644128] [2021-03-10 22:03:11,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:11,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:11,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:11,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:11,008 INFO L87 Difference]: Start difference. First operand 324 states and 964 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:11,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:11,121 INFO L93 Difference]: Finished difference Result 335 states and 989 transitions. [2021-03-10 22:03:11,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:11,121 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:11,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:11,122 INFO L225 Difference]: With dead ends: 335 [2021-03-10 22:03:11,122 INFO L226 Difference]: Without dead ends: 335 [2021-03-10 22:03:11,122 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:03:11,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-03-10 22:03:11,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 307. [2021-03-10 22:03:11,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9901960784313726) internal successors, (915), 306 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:11,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 915 transitions. [2021-03-10 22:03:11,126 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 915 transitions. Word has length 20 [2021-03-10 22:03:11,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:11,126 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 915 transitions. [2021-03-10 22:03:11,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:11,126 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 915 transitions. [2021-03-10 22:03:11,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:11,126 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:11,126 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:11,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3160 [2021-03-10 22:03:11,327 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:11,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:11,327 INFO L82 PathProgramCache]: Analyzing trace with hash 2107033044, now seen corresponding path program 329 times [2021-03-10 22:03:11,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:11,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475047810] [2021-03-10 22:03:11,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:11,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:11,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475047810] [2021-03-10 22:03:11,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600592333] [2021-03-10 22:03:11,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:11,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:03:11,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:11,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:11,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:11,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:11,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:11,540 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:11,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:11,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:03:11,543 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:11,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:11,546 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:11,566 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-03-10 22:03:11,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:11,567 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-03-10 22:03:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:11,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:11,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-10 22:03:11,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208424592] [2021-03-10 22:03:11,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:03:11,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:11,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:03:11,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:03:11,632 INFO L87 Difference]: Start difference. First operand 307 states and 915 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:12,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:12,094 INFO L93 Difference]: Finished difference Result 377 states and 1078 transitions. [2021-03-10 22:03:12,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:12,095 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:12,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:12,095 INFO L225 Difference]: With dead ends: 377 [2021-03-10 22:03:12,095 INFO L226 Difference]: Without dead ends: 325 [2021-03-10 22:03:12,096 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 435.7ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:03:12,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-03-10 22:03:12,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 284. [2021-03-10 22:03:12,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.954063604240283) internal successors, (836), 283 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:12,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 836 transitions. [2021-03-10 22:03:12,099 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 836 transitions. Word has length 20 [2021-03-10 22:03:12,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:12,099 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 836 transitions. [2021-03-10 22:03:12,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:12,099 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 836 transitions. [2021-03-10 22:03:12,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:12,099 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:12,099 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:12,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3163 [2021-03-10 22:03:12,300 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:12,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:12,300 INFO L82 PathProgramCache]: Analyzing trace with hash 6577655, now seen corresponding path program 330 times [2021-03-10 22:03:12,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:12,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120096251] [2021-03-10 22:03:12,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:12,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120096251] [2021-03-10 22:03:12,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988906287] [2021-03-10 22:03:12,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:12,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:03:12,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:12,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:12,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:12,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:03:12,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:12,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:12,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:12,520 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-03-10 22:03:12,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:03:12,523 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:12,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:12,526 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:12,546 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-03-10 22:03:12,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:12,547 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-03-10 22:03:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:12,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:12,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:12,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202516867] [2021-03-10 22:03:12,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:12,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:12,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:12,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:12,588 INFO L87 Difference]: Start difference. First operand 284 states and 836 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:12,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:12,808 INFO L93 Difference]: Finished difference Result 438 states and 1259 transitions. [2021-03-10 22:03:12,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:12,809 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:12,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:12,810 INFO L225 Difference]: With dead ends: 438 [2021-03-10 22:03:12,810 INFO L226 Difference]: Without dead ends: 438 [2021-03-10 22:03:12,810 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 172.7ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:03:12,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-03-10 22:03:12,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 298. [2021-03-10 22:03:12,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9797979797979797) internal successors, (885), 297 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-03-10 22:03:12,814 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-03-10 22:03:12,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:12,814 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-03-10 22:03:12,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:12,814 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-03-10 22:03:12,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:12,814 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:12,814 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:13,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3177 [2021-03-10 22:03:13,015 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:13,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:13,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1165221185, now seen corresponding path program 331 times [2021-03-10 22:03:13,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:13,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502571610] [2021-03-10 22:03:13,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:13,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502571610] [2021-03-10 22:03:13,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808597217] [2021-03-10 22:03:13,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:13,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:13,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:13,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:03:13,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:13,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:03:13,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,246 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-03-10 22:03:13,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:13,249 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:13,252 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:13,270 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:03:13,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:13,271 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-03-10 22:03:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:13,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:13,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:13,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536347370] [2021-03-10 22:03:13,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:13,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:13,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:13,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:13,316 INFO L87 Difference]: Start difference. First operand 298 states and 885 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:13,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:13,661 INFO L93 Difference]: Finished difference Result 490 states and 1380 transitions. [2021-03-10 22:03:13,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:03:13,661 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:13,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:13,662 INFO L225 Difference]: With dead ends: 490 [2021-03-10 22:03:13,662 INFO L226 Difference]: Without dead ends: 490 [2021-03-10 22:03:13,662 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 282.5ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:03:13,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-03-10 22:03:13,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 304. [2021-03-10 22:03:13,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0033003300330035) internal successors, (910), 303 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:13,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 910 transitions. [2021-03-10 22:03:13,666 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 910 transitions. Word has length 20 [2021-03-10 22:03:13,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:13,666 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 910 transitions. [2021-03-10 22:03:13,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:13,666 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 910 transitions. [2021-03-10 22:03:13,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:13,666 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:13,666 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:13,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3189,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:13,867 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:13,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:13,867 INFO L82 PathProgramCache]: Analyzing trace with hash -328686537, now seen corresponding path program 332 times [2021-03-10 22:03:13,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:13,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824468817] [2021-03-10 22:03:13,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:13,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824468817] [2021-03-10 22:03:13,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906746931] [2021-03-10 22:03:13,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:13,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:13,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:13,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:13,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:14,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:03:14,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:14,081 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-03-10 22:03:14,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:14,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:14,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:14,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:03:14,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:14,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:14,108 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:14,128 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-03-10 22:03:14,128 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:03:14,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:14,129 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-03-10 22:03:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:14,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:14,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:14,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984916730] [2021-03-10 22:03:14,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:14,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:14,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:14,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:14,173 INFO L87 Difference]: Start difference. First operand 304 states and 910 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:14,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:14,378 INFO L93 Difference]: Finished difference Result 447 states and 1271 transitions. [2021-03-10 22:03:14,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:14,378 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:14,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:14,379 INFO L225 Difference]: With dead ends: 447 [2021-03-10 22:03:14,379 INFO L226 Difference]: Without dead ends: 441 [2021-03-10 22:03:14,379 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 172.7ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:03:14,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-03-10 22:03:14,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 302. [2021-03-10 22:03:14,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9867109634551494) internal successors, (899), 301 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:14,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 899 transitions. [2021-03-10 22:03:14,383 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 899 transitions. Word has length 20 [2021-03-10 22:03:14,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:14,383 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 899 transitions. [2021-03-10 22:03:14,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:14,384 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 899 transitions. [2021-03-10 22:03:14,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:14,384 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:14,384 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:14,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3200,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:14,584 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:14,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:14,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1825154753, now seen corresponding path program 333 times [2021-03-10 22:03:14,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:14,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399399551] [2021-03-10 22:03:14,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:14,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399399551] [2021-03-10 22:03:14,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807016172] [2021-03-10 22:03:14,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:14,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:03:14,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:14,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:14,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:14,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:03:14,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:14,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:14,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:14,798 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-03-10 22:03:14,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:03:14,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:14,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:14,804 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:14,825 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-03-10 22:03:14,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:14,825 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-03-10 22:03:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:14,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:14,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:14,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524955589] [2021-03-10 22:03:14,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:14,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:14,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:14,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:14,879 INFO L87 Difference]: Start difference. First operand 302 states and 899 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:15,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:15,179 INFO L93 Difference]: Finished difference Result 550 states and 1569 transitions. [2021-03-10 22:03:15,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:03:15,179 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:15,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:15,180 INFO L225 Difference]: With dead ends: 550 [2021-03-10 22:03:15,180 INFO L226 Difference]: Without dead ends: 550 [2021-03-10 22:03:15,180 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:03:15,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-03-10 22:03:15,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 308. [2021-03-10 22:03:15,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.006514657980456) internal successors, (923), 307 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:15,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 923 transitions. [2021-03-10 22:03:15,185 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 923 transitions. Word has length 20 [2021-03-10 22:03:15,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:15,185 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 923 transitions. [2021-03-10 22:03:15,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:15,185 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 923 transitions. [2021-03-10 22:03:15,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:15,185 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:15,185 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:15,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3210,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:15,386 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:15,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:15,386 INFO L82 PathProgramCache]: Analyzing trace with hash -836761151, now seen corresponding path program 334 times [2021-03-10 22:03:15,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:15,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055138551] [2021-03-10 22:03:15,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:15,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:15,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055138551] [2021-03-10 22:03:15,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638087183] [2021-03-10 22:03:15,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:15,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:15,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:15,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:15,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:15,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:03:15,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:15,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:15,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:15,585 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-03-10 22:03:15,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:15,588 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:15,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:15,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:15,597 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-03-10 22:03:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:15,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:15,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:15,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469429701] [2021-03-10 22:03:15,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:15,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:15,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:15,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:15,648 INFO L87 Difference]: Start difference. First operand 308 states and 923 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:15,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:15,854 INFO L93 Difference]: Finished difference Result 517 states and 1487 transitions. [2021-03-10 22:03:15,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:15,855 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:15,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:15,856 INFO L225 Difference]: With dead ends: 517 [2021-03-10 22:03:15,856 INFO L226 Difference]: Without dead ends: 517 [2021-03-10 22:03:15,856 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:03:15,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-03-10 22:03:15,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 311. [2021-03-10 22:03:15,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0258064516129033) internal successors, (938), 310 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:15,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 938 transitions. [2021-03-10 22:03:15,860 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 938 transitions. Word has length 20 [2021-03-10 22:03:15,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:15,860 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 938 transitions. [2021-03-10 22:03:15,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:15,860 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 938 transitions. [2021-03-10 22:03:15,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:15,860 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:15,860 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:16,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3222,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:16,061 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:16,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:16,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1501069189, now seen corresponding path program 335 times [2021-03-10 22:03:16,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:16,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440293322] [2021-03-10 22:03:16,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:16,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440293322] [2021-03-10 22:03:16,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542028031] [2021-03-10 22:03:16,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:16,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:16,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:16,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:16,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:16,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:16,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:16,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,319 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.7 percent of original size [2021-03-10 22:03:16,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:03:16,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,340 INFO L628 ElimStorePlain]: treesize reduction 11, result has 64.5 percent of original size [2021-03-10 22:03:16,341 INFO L518 ElimStorePlain]: Eliminatee v_prenex_116 vanished before elimination [2021-03-10 22:03:16,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:16,341 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-03-10 22:03:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:16,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:16,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:16,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982476637] [2021-03-10 22:03:16,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:16,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:16,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:16,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:16,389 INFO L87 Difference]: Start difference. First operand 311 states and 938 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:16,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:16,590 INFO L93 Difference]: Finished difference Result 484 states and 1410 transitions. [2021-03-10 22:03:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:16,590 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:16,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:16,591 INFO L225 Difference]: With dead ends: 484 [2021-03-10 22:03:16,591 INFO L226 Difference]: Without dead ends: 484 [2021-03-10 22:03:16,591 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:03:16,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-03-10 22:03:16,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 302. [2021-03-10 22:03:16,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9867109634551494) internal successors, (899), 301 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:16,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 899 transitions. [2021-03-10 22:03:16,595 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 899 transitions. Word has length 20 [2021-03-10 22:03:16,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:16,595 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 899 transitions. [2021-03-10 22:03:16,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:16,595 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 899 transitions. [2021-03-10 22:03:16,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:16,596 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:16,596 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:16,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3231 [2021-03-10 22:03:16,796 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:16,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:16,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1504948017, now seen corresponding path program 336 times [2021-03-10 22:03:16,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:16,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290468660] [2021-03-10 22:03:16,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:16,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:16,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290468660] [2021-03-10 22:03:16,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791647339] [2021-03-10 22:03:16,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:16,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:03:16,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:16,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:16,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:16,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:16,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:16,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:03:16,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:17,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:17,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:03:17,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:17,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:17,018 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:17,038 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-03-10 22:03:17,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:17,039 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-03-10 22:03:17,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:17,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:17,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:17,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147545170] [2021-03-10 22:03:17,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:17,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:17,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:17,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:17,119 INFO L87 Difference]: Start difference. First operand 302 states and 899 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:17,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:17,526 INFO L93 Difference]: Finished difference Result 615 states and 1694 transitions. [2021-03-10 22:03:17,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:03:17,527 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:17,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:17,528 INFO L225 Difference]: With dead ends: 615 [2021-03-10 22:03:17,528 INFO L226 Difference]: Without dead ends: 615 [2021-03-10 22:03:17,528 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 373.9ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:03:17,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-03-10 22:03:17,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 310. [2021-03-10 22:03:17,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.0258899676375406) internal successors, (935), 309 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:17,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 935 transitions. [2021-03-10 22:03:17,532 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 935 transitions. Word has length 20 [2021-03-10 22:03:17,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:17,532 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 935 transitions. [2021-03-10 22:03:17,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:17,532 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 935 transitions. [2021-03-10 22:03:17,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:17,533 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:17,533 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:17,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3241 [2021-03-10 22:03:17,733 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:17,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:17,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1296111557, now seen corresponding path program 337 times [2021-03-10 22:03:17,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:17,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751257020] [2021-03-10 22:03:17,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:17,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:17,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751257020] [2021-03-10 22:03:17,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327083840] [2021-03-10 22:03:17,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:17,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:17,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:17,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:03:17,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:17,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:17,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:03:17,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:17,958 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-03-10 22:03:17,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:17,960 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:17,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:17,963 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:17,981 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:03:17,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:17,982 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-03-10 22:03:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:18,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:18,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:18,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529186281] [2021-03-10 22:03:18,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:18,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:18,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:18,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:18,059 INFO L87 Difference]: Start difference. First operand 310 states and 935 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:18,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:18,330 INFO L93 Difference]: Finished difference Result 549 states and 1540 transitions. [2021-03-10 22:03:18,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:18,330 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:18,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:18,331 INFO L225 Difference]: With dead ends: 549 [2021-03-10 22:03:18,331 INFO L226 Difference]: Without dead ends: 543 [2021-03-10 22:03:18,331 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 247.4ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:18,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-03-10 22:03:18,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 304. [2021-03-10 22:03:18,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0033003300330035) internal successors, (910), 303 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:18,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 910 transitions. [2021-03-10 22:03:18,335 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 910 transitions. Word has length 20 [2021-03-10 22:03:18,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:18,335 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 910 transitions. [2021-03-10 22:03:18,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:18,335 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 910 transitions. [2021-03-10 22:03:18,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:18,336 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:18,336 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:18,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3251 [2021-03-10 22:03:18,536 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:18,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:18,537 INFO L82 PathProgramCache]: Analyzing trace with hash -753547579, now seen corresponding path program 338 times [2021-03-10 22:03:18,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:18,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158114340] [2021-03-10 22:03:18,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:18,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:18,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158114340] [2021-03-10 22:03:18,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762703501] [2021-03-10 22:03:18,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:18,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:18,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:18,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:18,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:18,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:03:18,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:18,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:18,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:18,741 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-03-10 22:03:18,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:18,744 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:18,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:18,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:18,754 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-03-10 22:03:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:18,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:18,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:18,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101413832] [2021-03-10 22:03:18,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:18,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:18,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:18,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:18,840 INFO L87 Difference]: Start difference. First operand 304 states and 910 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:19,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:19,120 INFO L93 Difference]: Finished difference Result 574 states and 1629 transitions. [2021-03-10 22:03:19,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:19,121 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:19,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:19,122 INFO L225 Difference]: With dead ends: 574 [2021-03-10 22:03:19,122 INFO L226 Difference]: Without dead ends: 574 [2021-03-10 22:03:19,122 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 274.3ms TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:19,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-03-10 22:03:19,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 307. [2021-03-10 22:03:19,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.022875816993464) internal successors, (925), 306 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:19,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 925 transitions. [2021-03-10 22:03:19,126 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 925 transitions. Word has length 20 [2021-03-10 22:03:19,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:19,126 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 925 transitions. [2021-03-10 22:03:19,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:19,126 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 925 transitions. [2021-03-10 22:03:19,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:19,127 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:19,127 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:19,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3262 [2021-03-10 22:03:19,327 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:19,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:19,327 INFO L82 PathProgramCache]: Analyzing trace with hash 538794821, now seen corresponding path program 339 times [2021-03-10 22:03:19,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:19,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289618739] [2021-03-10 22:03:19,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:19,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:19,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289618739] [2021-03-10 22:03:19,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78876926] [2021-03-10 22:03:19,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:19,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:03:19,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:19,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:19,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:19,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:03:19,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:19,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:19,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:19,529 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-03-10 22:03:19,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:19,532 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:19,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:19,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:19,541 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-03-10 22:03:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:19,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:19,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:19,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830761648] [2021-03-10 22:03:19,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:19,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:19,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:19,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:19,621 INFO L87 Difference]: Start difference. First operand 307 states and 925 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:19,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:19,882 INFO L93 Difference]: Finished difference Result 543 states and 1562 transitions. [2021-03-10 22:03:19,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:19,882 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:19,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:19,883 INFO L225 Difference]: With dead ends: 543 [2021-03-10 22:03:19,883 INFO L226 Difference]: Without dead ends: 543 [2021-03-10 22:03:19,883 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 264.1ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:19,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-03-10 22:03:19,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 304. [2021-03-10 22:03:19,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0033003300330035) internal successors, (910), 303 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:19,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 910 transitions. [2021-03-10 22:03:19,887 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 910 transitions. Word has length 20 [2021-03-10 22:03:19,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:19,887 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 910 transitions. [2021-03-10 22:03:19,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:19,887 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 910 transitions. [2021-03-10 22:03:19,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:19,888 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:19,888 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:20,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3273,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:20,088 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:20,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:20,089 INFO L82 PathProgramCache]: Analyzing trace with hash -732811051, now seen corresponding path program 340 times [2021-03-10 22:03:20,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:20,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924487327] [2021-03-10 22:03:20,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:20,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:20,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924487327] [2021-03-10 22:03:20,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353110954] [2021-03-10 22:03:20,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:20,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:20,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:20,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:20,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:20,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:03:20,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:20,307 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-03-10 22:03:20,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:03:20,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:20,342 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-03-10 22:03:20,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:20,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:20,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:20,347 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:20,365 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-03-10 22:03:20,365 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:03:20,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:20,366 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-03-10 22:03:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:20,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:20,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:20,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41425750] [2021-03-10 22:03:20,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:20,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:20,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:20,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:20,445 INFO L87 Difference]: Start difference. First operand 304 states and 910 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:20,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:20,665 INFO L93 Difference]: Finished difference Result 497 states and 1409 transitions. [2021-03-10 22:03:20,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:20,665 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:20,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:20,666 INFO L225 Difference]: With dead ends: 497 [2021-03-10 22:03:20,666 INFO L226 Difference]: Without dead ends: 491 [2021-03-10 22:03:20,666 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 230.6ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:20,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-03-10 22:03:20,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 308. [2021-03-10 22:03:20,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.009771986970684) internal successors, (924), 307 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:20,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 924 transitions. [2021-03-10 22:03:20,670 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 924 transitions. Word has length 20 [2021-03-10 22:03:20,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:20,671 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 924 transitions. [2021-03-10 22:03:20,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:20,671 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 924 transitions. [2021-03-10 22:03:20,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:20,671 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:20,671 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:20,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3283 [2021-03-10 22:03:20,872 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:20,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:20,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1646732319, now seen corresponding path program 341 times [2021-03-10 22:03:20,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:20,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534962337] [2021-03-10 22:03:20,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:20,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:20,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534962337] [2021-03-10 22:03:20,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056614763] [2021-03-10 22:03:20,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:21,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:03:21,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:21,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:03:21,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:21,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:21,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:21,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:21,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:21,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:03:21,067 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:21,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:03:21,070 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:21,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:03:21,073 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:21,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:21,076 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:21,115 INFO L628 ElimStorePlain]: treesize reduction 29, result has 57.4 percent of original size [2021-03-10 22:03:21,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:03:21,116 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:126, output treesize:39 [2021-03-10 22:03:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:21,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:21,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:03:21,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412620306] [2021-03-10 22:03:21,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:03:21,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:21,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:03:21,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:03:21,275 INFO L87 Difference]: Start difference. First operand 308 states and 924 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:21,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:21,770 INFO L93 Difference]: Finished difference Result 503 states and 1430 transitions. [2021-03-10 22:03:21,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:03:21,770 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:21,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:21,771 INFO L225 Difference]: With dead ends: 503 [2021-03-10 22:03:21,771 INFO L226 Difference]: Without dead ends: 503 [2021-03-10 22:03:21,771 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 484.0ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:03:21,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-03-10 22:03:21,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 303. [2021-03-10 22:03:21,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.0) internal successors, (906), 302 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:21,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 906 transitions. [2021-03-10 22:03:21,775 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 906 transitions. Word has length 20 [2021-03-10 22:03:21,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:21,775 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 906 transitions. [2021-03-10 22:03:21,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:21,775 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 906 transitions. [2021-03-10 22:03:21,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:21,775 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:21,776 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:21,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3295,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:21,976 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:21,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:21,976 INFO L82 PathProgramCache]: Analyzing trace with hash 764376663, now seen corresponding path program 342 times [2021-03-10 22:03:21,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:21,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458547282] [2021-03-10 22:03:21,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:22,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458547282] [2021-03-10 22:03:22,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220361971] [2021-03-10 22:03:22,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:22,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:03:22,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:22,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:22,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:22,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:22,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:22,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:22,151 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:22,164 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 22:03:22,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:03:22,165 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 22:03:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:22,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:22,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:22,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718878208] [2021-03-10 22:03:22,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:22,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:22,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:22,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:22,201 INFO L87 Difference]: Start difference. First operand 303 states and 906 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:22,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:22,378 INFO L93 Difference]: Finished difference Result 467 states and 1384 transitions. [2021-03-10 22:03:22,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:22,379 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:22,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:22,380 INFO L225 Difference]: With dead ends: 467 [2021-03-10 22:03:22,380 INFO L226 Difference]: Without dead ends: 467 [2021-03-10 22:03:22,380 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:03:22,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-03-10 22:03:22,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 315. [2021-03-10 22:03:22,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.0191082802547773) internal successors, (948), 314 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:22,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 948 transitions. [2021-03-10 22:03:22,384 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 948 transitions. Word has length 20 [2021-03-10 22:03:22,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:22,384 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 948 transitions. [2021-03-10 22:03:22,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:22,384 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 948 transitions. [2021-03-10 22:03:22,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:22,384 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:22,384 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:22,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3308 [2021-03-10 22:03:22,585 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:22,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:22,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1897539241, now seen corresponding path program 343 times [2021-03-10 22:03:22,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:22,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461572050] [2021-03-10 22:03:22,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:22,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461572050] [2021-03-10 22:03:22,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120379021] [2021-03-10 22:03:22,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:22,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:22,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:22,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:22,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:22,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:22,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:22,778 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 22:03:22,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:03:22,779 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 22:03:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:22,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:22,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:22,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633673335] [2021-03-10 22:03:22,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:22,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:22,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:22,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:22,822 INFO L87 Difference]: Start difference. First operand 315 states and 948 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:23,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:23,033 INFO L93 Difference]: Finished difference Result 471 states and 1376 transitions. [2021-03-10 22:03:23,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:23,033 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:23,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:23,034 INFO L225 Difference]: With dead ends: 471 [2021-03-10 22:03:23,034 INFO L226 Difference]: Without dead ends: 471 [2021-03-10 22:03:23,034 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:03:23,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-03-10 22:03:23,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 318. [2021-03-10 22:03:23,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.0378548895899056) internal successors, (963), 317 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:23,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 963 transitions. [2021-03-10 22:03:23,038 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 963 transitions. Word has length 20 [2021-03-10 22:03:23,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:23,038 INFO L480 AbstractCegarLoop]: Abstraction has 318 states and 963 transitions. [2021-03-10 22:03:23,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:23,038 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 963 transitions. [2021-03-10 22:03:23,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:23,039 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:23,039 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:23,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3314,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:23,239 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:23,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:23,240 INFO L82 PathProgramCache]: Analyzing trace with hash 440291099, now seen corresponding path program 344 times [2021-03-10 22:03:23,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:23,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529076082] [2021-03-10 22:03:23,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:23,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529076082] [2021-03-10 22:03:23,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335857031] [2021-03-10 22:03:23,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:23,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:23,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:23,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:23,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:23,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:23,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:23,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:23,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:23,431 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 22:03:23,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:03:23,432 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 22:03:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:23,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:23,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:23,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335820987] [2021-03-10 22:03:23,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:23,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:23,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:23,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:23,463 INFO L87 Difference]: Start difference. First operand 318 states and 963 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:23,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:23,675 INFO L93 Difference]: Finished difference Result 428 states and 1279 transitions. [2021-03-10 22:03:23,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:23,676 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:23,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:23,677 INFO L225 Difference]: With dead ends: 428 [2021-03-10 22:03:23,677 INFO L226 Difference]: Without dead ends: 428 [2021-03-10 22:03:23,677 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:03:23,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-03-10 22:03:23,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 309. [2021-03-10 22:03:23,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0) internal successors, (924), 308 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:23,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 924 transitions. [2021-03-10 22:03:23,681 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 924 transitions. Word has length 20 [2021-03-10 22:03:23,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:23,681 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 924 transitions. [2021-03-10 22:03:23,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:23,681 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 924 transitions. [2021-03-10 22:03:23,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:23,681 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:23,681 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:23,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3320 [2021-03-10 22:03:23,882 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:23,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:23,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1060624641, now seen corresponding path program 345 times [2021-03-10 22:03:23,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:23,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725960393] [2021-03-10 22:03:23,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:23,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725960393] [2021-03-10 22:03:23,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668568314] [2021-03-10 22:03:23,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:24,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:03:24,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:24,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:24,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:24,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:24,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:24,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667724312] [2021-03-10 22:03:24,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:24,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:24,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:24,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:24,097 INFO L87 Difference]: Start difference. First operand 309 states and 924 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:24,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:24,312 INFO L93 Difference]: Finished difference Result 381 states and 1121 transitions. [2021-03-10 22:03:24,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:24,313 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:24,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:24,313 INFO L225 Difference]: With dead ends: 381 [2021-03-10 22:03:24,313 INFO L226 Difference]: Without dead ends: 381 [2021-03-10 22:03:24,313 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:03:24,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-03-10 22:03:24,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 315. [2021-03-10 22:03:24,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.0286624203821657) internal successors, (951), 314 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:24,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 951 transitions. [2021-03-10 22:03:24,317 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 951 transitions. Word has length 20 [2021-03-10 22:03:24,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:24,317 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 951 transitions. [2021-03-10 22:03:24,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:24,317 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 951 transitions. [2021-03-10 22:03:24,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:24,318 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:24,318 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:24,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3326,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:24,518 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:24,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:24,518 INFO L82 PathProgramCache]: Analyzing trace with hash -896512315, now seen corresponding path program 346 times [2021-03-10 22:03:24,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:24,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353420991] [2021-03-10 22:03:24,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:24,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:24,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353420991] [2021-03-10 22:03:24,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954257104] [2021-03-10 22:03:24,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:24,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:24,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:24,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:24,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:24,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:24,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:24,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218290431] [2021-03-10 22:03:24,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:24,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:24,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:24,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:24,729 INFO L87 Difference]: Start difference. First operand 315 states and 951 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:24,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:24,970 INFO L93 Difference]: Finished difference Result 387 states and 1136 transitions. [2021-03-10 22:03:24,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:03:24,971 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:24,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:24,971 INFO L225 Difference]: With dead ends: 387 [2021-03-10 22:03:24,971 INFO L226 Difference]: Without dead ends: 387 [2021-03-10 22:03:24,972 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 158.3ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:24,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-03-10 22:03:24,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 312. [2021-03-10 22:03:24,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.009646302250804) internal successors, (936), 311 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:24,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 936 transitions. [2021-03-10 22:03:24,976 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 936 transitions. Word has length 20 [2021-03-10 22:03:24,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:24,976 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 936 transitions. [2021-03-10 22:03:24,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:24,976 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 936 transitions. [2021-03-10 22:03:24,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:24,976 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:24,976 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:25,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3332,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:25,177 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:25,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:25,177 INFO L82 PathProgramCache]: Analyzing trace with hash -893886539, now seen corresponding path program 347 times [2021-03-10 22:03:25,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:25,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601709824] [2021-03-10 22:03:25,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:25,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601709824] [2021-03-10 22:03:25,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929891596] [2021-03-10 22:03:25,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:25,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:25,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:25,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:25,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:25,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:25,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:25,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623244348] [2021-03-10 22:03:25,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:25,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:25,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:25,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:25,387 INFO L87 Difference]: Start difference. First operand 312 states and 936 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:25,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:25,576 INFO L93 Difference]: Finished difference Result 345 states and 1029 transitions. [2021-03-10 22:03:25,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:25,576 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:25,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:25,577 INFO L225 Difference]: With dead ends: 345 [2021-03-10 22:03:25,577 INFO L226 Difference]: Without dead ends: 345 [2021-03-10 22:03:25,577 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:03:25,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-03-10 22:03:25,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 303. [2021-03-10 22:03:25,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.0) internal successors, (906), 302 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:25,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 906 transitions. [2021-03-10 22:03:25,580 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 906 transitions. Word has length 20 [2021-03-10 22:03:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:25,581 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 906 transitions. [2021-03-10 22:03:25,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:25,581 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 906 transitions. [2021-03-10 22:03:25,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:25,581 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:25,581 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:25,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3337 [2021-03-10 22:03:25,782 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:25,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:25,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1304929953, now seen corresponding path program 348 times [2021-03-10 22:03:25,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:25,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584789430] [2021-03-10 22:03:25,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:25,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:25,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584789430] [2021-03-10 22:03:25,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177607273] [2021-03-10 22:03:25,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:25,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:03:25,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:25,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:25,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:26,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:26,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:26,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036781462] [2021-03-10 22:03:26,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:26,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:26,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:26,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:26,016 INFO L87 Difference]: Start difference. First operand 303 states and 906 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:26,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:26,308 INFO L93 Difference]: Finished difference Result 510 states and 1432 transitions. [2021-03-10 22:03:26,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:03:26,308 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:26,309 INFO L225 Difference]: With dead ends: 510 [2021-03-10 22:03:26,309 INFO L226 Difference]: Without dead ends: 510 [2021-03-10 22:03:26,309 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 267.8ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:03:26,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-03-10 22:03:26,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 313. [2021-03-10 22:03:26,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.048076923076923) internal successors, (951), 312 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:26,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 951 transitions. [2021-03-10 22:03:26,313 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 951 transitions. Word has length 20 [2021-03-10 22:03:26,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:26,313 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 951 transitions. [2021-03-10 22:03:26,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:26,313 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 951 transitions. [2021-03-10 22:03:26,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:26,313 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:26,313 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:26,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3341 [2021-03-10 22:03:26,514 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:26,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:26,514 INFO L82 PathProgramCache]: Analyzing trace with hash -188977769, now seen corresponding path program 349 times [2021-03-10 22:03:26,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:26,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395319627] [2021-03-10 22:03:26,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:26,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395319627] [2021-03-10 22:03:26,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081758607] [2021-03-10 22:03:26,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:26,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:26,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:26,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:26,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:26,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358051573] [2021-03-10 22:03:26,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:26,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:26,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:26,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:26,739 INFO L87 Difference]: Start difference. First operand 313 states and 951 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:26,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:26,923 INFO L93 Difference]: Finished difference Result 444 states and 1278 transitions. [2021-03-10 22:03:26,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:26,923 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:26,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:26,924 INFO L225 Difference]: With dead ends: 444 [2021-03-10 22:03:26,924 INFO L226 Difference]: Without dead ends: 438 [2021-03-10 22:03:26,924 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 180.3ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:26,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-03-10 22:03:26,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 307. [2021-03-10 22:03:26,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.026143790849673) internal successors, (926), 306 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:26,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2021-03-10 22:03:26,928 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 20 [2021-03-10 22:03:26,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:26,928 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2021-03-10 22:03:26,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:26,928 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2021-03-10 22:03:26,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:26,928 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:26,928 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:27,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3349,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:27,129 INFO L428 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:27,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:27,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2056330391, now seen corresponding path program 350 times [2021-03-10 22:03:27,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:27,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137314650] [2021-03-10 22:03:27,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:27,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:27,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:27,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137314650] [2021-03-10 22:03:27,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264977195] [2021-03-10 22:03:27,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:27,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:27,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:27,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:27,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:27,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:27,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:27,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035029929] [2021-03-10 22:03:27,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:27,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:27,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:27,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:27,361 INFO L87 Difference]: Start difference. First operand 307 states and 926 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:27,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:27,661 INFO L93 Difference]: Finished difference Result 515 states and 1476 transitions. [2021-03-10 22:03:27,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:03:27,662 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:27,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:27,662 INFO L225 Difference]: With dead ends: 515 [2021-03-10 22:03:27,662 INFO L226 Difference]: Without dead ends: 515 [2021-03-10 22:03:27,663 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 272.3ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:03:27,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-03-10 22:03:27,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 310. [2021-03-10 22:03:27,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.045307443365696) internal successors, (941), 309 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:27,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 941 transitions. [2021-03-10 22:03:27,667 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 941 transitions. Word has length 20 [2021-03-10 22:03:27,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:27,667 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 941 transitions. [2021-03-10 22:03:27,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:27,667 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 941 transitions. [2021-03-10 22:03:27,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:27,667 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:27,667 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:27,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3358,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:27,868 INFO L428 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:27,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:27,868 INFO L82 PathProgramCache]: Analyzing trace with hash -946294505, now seen corresponding path program 351 times [2021-03-10 22:03:27,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:27,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674271817] [2021-03-10 22:03:27,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:27,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:27,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674271817] [2021-03-10 22:03:27,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013448092] [2021-03-10 22:03:27,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:28,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:03:28,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:28,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:28,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:28,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:28,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:28,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042688183] [2021-03-10 22:03:28,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:28,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:28,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:28,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:28,101 INFO L87 Difference]: Start difference. First operand 310 states and 941 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:28,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:28,413 INFO L93 Difference]: Finished difference Result 484 states and 1409 transitions. [2021-03-10 22:03:28,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:03:28,414 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:28,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:28,415 INFO L225 Difference]: With dead ends: 484 [2021-03-10 22:03:28,415 INFO L226 Difference]: Without dead ends: 484 [2021-03-10 22:03:28,415 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:03:28,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-03-10 22:03:28,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 307. [2021-03-10 22:03:28,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.026143790849673) internal successors, (926), 306 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:28,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2021-03-10 22:03:28,419 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 20 [2021-03-10 22:03:28,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:28,419 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2021-03-10 22:03:28,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:28,419 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2021-03-10 22:03:28,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:28,419 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:28,420 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:28,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3366,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:28,620 INFO L428 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:28,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:28,620 INFO L82 PathProgramCache]: Analyzing trace with hash 2077066919, now seen corresponding path program 352 times [2021-03-10 22:03:28,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:28,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197987705] [2021-03-10 22:03:28,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:28,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:28,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:28,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197987705] [2021-03-10 22:03:28,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659094799] [2021-03-10 22:03:28,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:28,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:28,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:28,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:28,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:28,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:28,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:28,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194196193] [2021-03-10 22:03:28,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:28,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:28,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:28,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:28,856 INFO L87 Difference]: Start difference. First operand 307 states and 926 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:29,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:29,156 INFO L93 Difference]: Finished difference Result 481 states and 1357 transitions. [2021-03-10 22:03:29,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:03:29,156 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:29,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:29,157 INFO L225 Difference]: With dead ends: 481 [2021-03-10 22:03:29,157 INFO L226 Difference]: Without dead ends: 475 [2021-03-10 22:03:29,157 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 276.2ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:03:29,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-03-10 22:03:29,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 311. [2021-03-10 22:03:29,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.032258064516129) internal successors, (940), 310 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:29,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 940 transitions. [2021-03-10 22:03:29,161 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 940 transitions. Word has length 20 [2021-03-10 22:03:29,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:29,161 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 940 transitions. [2021-03-10 22:03:29,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:29,161 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 940 transitions. [2021-03-10 22:03:29,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:29,162 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:29,162 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:29,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3374 [2021-03-10 22:03:29,363 INFO L428 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:29,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:29,363 INFO L82 PathProgramCache]: Analyzing trace with hash 161642993, now seen corresponding path program 353 times [2021-03-10 22:03:29,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:29,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74658643] [2021-03-10 22:03:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:29,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74658643] [2021-03-10 22:03:29,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046464407] [2021-03-10 22:03:29,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:29,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:03:29,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:29,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:29,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:29,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:29,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:29,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29869780] [2021-03-10 22:03:29,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:29,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:29,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:29,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:29,597 INFO L87 Difference]: Start difference. First operand 311 states and 940 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:29,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:29,978 INFO L93 Difference]: Finished difference Result 487 states and 1378 transitions. [2021-03-10 22:03:29,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:03:29,979 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:29,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:29,979 INFO L225 Difference]: With dead ends: 487 [2021-03-10 22:03:29,979 INFO L226 Difference]: Without dead ends: 487 [2021-03-10 22:03:29,980 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 333.3ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:03:29,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-03-10 22:03:29,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 305. [2021-03-10 22:03:29,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.0098684210526314) internal successors, (915), 304 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:29,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 915 transitions. [2021-03-10 22:03:29,984 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 915 transitions. Word has length 20 [2021-03-10 22:03:29,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:29,984 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 915 transitions. [2021-03-10 22:03:29,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:29,984 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 915 transitions. [2021-03-10 22:03:29,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:29,984 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:29,984 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:30,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3383 [2021-03-10 22:03:30,185 INFO L428 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:30,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:30,185 INFO L82 PathProgramCache]: Analyzing trace with hash -56098239, now seen corresponding path program 354 times [2021-03-10 22:03:30,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:30,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107328961] [2021-03-10 22:03:30,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:30,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:30,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107328961] [2021-03-10 22:03:30,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662144255] [2021-03-10 22:03:30,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:30,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:03:30,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:30,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:30,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:30,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:30,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:30,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494286062] [2021-03-10 22:03:30,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:30,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:30,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:30,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:30,415 INFO L87 Difference]: Start difference. First operand 305 states and 915 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:30,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:30,619 INFO L93 Difference]: Finished difference Result 429 states and 1262 transitions. [2021-03-10 22:03:30,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:30,619 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:30,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:30,620 INFO L225 Difference]: With dead ends: 429 [2021-03-10 22:03:30,620 INFO L226 Difference]: Without dead ends: 429 [2021-03-10 22:03:30,620 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 191.7ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:30,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-03-10 22:03:30,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 311. [2021-03-10 22:03:30,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0387096774193547) internal successors, (942), 310 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:30,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 942 transitions. [2021-03-10 22:03:30,624 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 942 transitions. Word has length 20 [2021-03-10 22:03:30,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:30,624 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 942 transitions. [2021-03-10 22:03:30,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:30,624 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 942 transitions. [2021-03-10 22:03:30,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:30,625 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:30,625 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:30,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3391 [2021-03-10 22:03:30,825 INFO L428 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:30,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:30,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1236244161, now seen corresponding path program 355 times [2021-03-10 22:03:30,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:30,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135423811] [2021-03-10 22:03:30,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:30,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:30,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135423811] [2021-03-10 22:03:30,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152973855] [2021-03-10 22:03:30,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:30,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:30,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:30,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:31,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:31,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:31,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603239724] [2021-03-10 22:03:31,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:31,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:31,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:31,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:31,060 INFO L87 Difference]: Start difference. First operand 311 states and 942 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:31,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:31,263 INFO L93 Difference]: Finished difference Result 423 states and 1244 transitions. [2021-03-10 22:03:31,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:31,264 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:31,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:31,264 INFO L225 Difference]: With dead ends: 423 [2021-03-10 22:03:31,265 INFO L226 Difference]: Without dead ends: 423 [2021-03-10 22:03:31,265 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 195.4ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:31,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-03-10 22:03:31,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 308. [2021-03-10 22:03:31,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.019543973941368) internal successors, (927), 307 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:31,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 927 transitions. [2021-03-10 22:03:31,269 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 927 transitions. Word has length 20 [2021-03-10 22:03:31,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:31,269 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 927 transitions. [2021-03-10 22:03:31,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:31,269 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 927 transitions. [2021-03-10 22:03:31,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:31,269 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:31,269 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:31,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3397 [2021-03-10 22:03:31,470 INFO L428 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:31,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:31,470 INFO L82 PathProgramCache]: Analyzing trace with hash -659620875, now seen corresponding path program 356 times [2021-03-10 22:03:31,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:31,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947686402] [2021-03-10 22:03:31,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:31,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:31,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947686402] [2021-03-10 22:03:31,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525069452] [2021-03-10 22:03:31,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:31,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:31,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:31,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:31,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:31,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:31,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:31,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843307504] [2021-03-10 22:03:31,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:31,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:31,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:31,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:31,707 INFO L87 Difference]: Start difference. First operand 308 states and 927 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:31,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:31,891 INFO L93 Difference]: Finished difference Result 384 states and 1137 transitions. [2021-03-10 22:03:31,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:31,892 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:31,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:31,892 INFO L225 Difference]: With dead ends: 384 [2021-03-10 22:03:31,892 INFO L226 Difference]: Without dead ends: 384 [2021-03-10 22:03:31,893 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:31,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-03-10 22:03:31,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 305. [2021-03-10 22:03:31,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.0098684210526314) internal successors, (915), 304 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:31,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 915 transitions. [2021-03-10 22:03:31,896 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 915 transitions. Word has length 20 [2021-03-10 22:03:31,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:31,896 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 915 transitions. [2021-03-10 22:03:31,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:31,896 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 915 transitions. [2021-03-10 22:03:31,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:31,896 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:31,897 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:32,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3403 [2021-03-10 22:03:32,097 INFO L428 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:32,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:32,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1302818889, now seen corresponding path program 357 times [2021-03-10 22:03:32,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:32,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653253966] [2021-03-10 22:03:32,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:32,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653253966] [2021-03-10 22:03:32,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122569849] [2021-03-10 22:03:32,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:32,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:03:32,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:32,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:32,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:32,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:32,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:32,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674248047] [2021-03-10 22:03:32,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:32,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:32,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:32,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:32,330 INFO L87 Difference]: Start difference. First operand 305 states and 915 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:32,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:32,493 INFO L93 Difference]: Finished difference Result 385 states and 1112 transitions. [2021-03-10 22:03:32,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:32,494 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:32,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:32,494 INFO L225 Difference]: With dead ends: 385 [2021-03-10 22:03:32,494 INFO L226 Difference]: Without dead ends: 379 [2021-03-10 22:03:32,494 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 177.1ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:32,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-03-10 22:03:32,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 313. [2021-03-10 22:03:32,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.016025641025641) internal successors, (941), 312 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:32,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 941 transitions. [2021-03-10 22:03:32,499 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 941 transitions. Word has length 20 [2021-03-10 22:03:32,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:32,499 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 941 transitions. [2021-03-10 22:03:32,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:32,499 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 941 transitions. [2021-03-10 22:03:32,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:32,499 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:32,499 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:32,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3407,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:32,700 INFO L428 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:32,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:32,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1076724481, now seen corresponding path program 358 times [2021-03-10 22:03:32,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:32,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487137126] [2021-03-10 22:03:32,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:32,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487137126] [2021-03-10 22:03:32,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44701680] [2021-03-10 22:03:32,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:32,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:32,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:32,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:32,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:32,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:32,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:32,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836888657] [2021-03-10 22:03:32,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:32,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:32,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:32,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:32,935 INFO L87 Difference]: Start difference. First operand 313 states and 941 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:33,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:33,167 INFO L93 Difference]: Finished difference Result 391 states and 1133 transitions. [2021-03-10 22:03:33,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:03:33,168 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:33,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:33,168 INFO L225 Difference]: With dead ends: 391 [2021-03-10 22:03:33,168 INFO L226 Difference]: Without dead ends: 391 [2021-03-10 22:03:33,168 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:03:33,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-03-10 22:03:33,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 309. [2021-03-10 22:03:33,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.00974025974026) internal successors, (927), 308 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:33,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 927 transitions. [2021-03-10 22:03:33,172 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 927 transitions. Word has length 20 [2021-03-10 22:03:33,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:33,172 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 927 transitions. [2021-03-10 22:03:33,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:33,172 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 927 transitions. [2021-03-10 22:03:33,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:33,173 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:33,173 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:33,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3415 [2021-03-10 22:03:33,373 INFO L428 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:33,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:33,374 INFO L82 PathProgramCache]: Analyzing trace with hash 2116960279, now seen corresponding path program 359 times [2021-03-10 22:03:33,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:33,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137719007] [2021-03-10 22:03:33,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:33,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137719007] [2021-03-10 22:03:33,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461425122] [2021-03-10 22:03:33,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:33,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:03:33,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:33,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:33,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:33,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:33,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:33,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:33,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040682205] [2021-03-10 22:03:33,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:33,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:33,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:33,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:33,595 INFO L87 Difference]: Start difference. First operand 309 states and 927 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:33,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:33,770 INFO L93 Difference]: Finished difference Result 366 states and 1083 transitions. [2021-03-10 22:03:33,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:33,770 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:33,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:33,771 INFO L225 Difference]: With dead ends: 366 [2021-03-10 22:03:33,771 INFO L226 Difference]: Without dead ends: 366 [2021-03-10 22:03:33,771 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 188.6ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:33,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-03-10 22:03:33,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 304. [2021-03-10 22:03:33,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.00990099009901) internal successors, (912), 303 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:33,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 912 transitions. [2021-03-10 22:03:33,774 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 912 transitions. Word has length 20 [2021-03-10 22:03:33,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:33,775 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 912 transitions. [2021-03-10 22:03:33,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:33,775 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 912 transitions. [2021-03-10 22:03:33,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:33,775 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:33,775 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:33,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3422,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:33,976 INFO L428 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:33,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:33,976 INFO L82 PathProgramCache]: Analyzing trace with hash -41862621, now seen corresponding path program 360 times [2021-03-10 22:03:33,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:33,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798695068] [2021-03-10 22:03:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:34,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798695068] [2021-03-10 22:03:34,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053098752] [2021-03-10 22:03:34,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:34,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:03:34,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:34,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:34,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:34,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:34,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:34,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:34,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:34,200 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 22:03:34,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:03:34,200 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 22:03:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:34,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:34,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:34,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6899138] [2021-03-10 22:03:34,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:34,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:34,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:34,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:34,236 INFO L87 Difference]: Start difference. First operand 304 states and 912 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:34,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:34,403 INFO L93 Difference]: Finished difference Result 446 states and 1311 transitions. [2021-03-10 22:03:34,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:34,403 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:34,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:34,404 INFO L225 Difference]: With dead ends: 446 [2021-03-10 22:03:34,404 INFO L226 Difference]: Without dead ends: 446 [2021-03-10 22:03:34,404 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:03:34,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-03-10 22:03:34,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 303. [2021-03-10 22:03:34,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.006622516556291) internal successors, (908), 302 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 908 transitions. [2021-03-10 22:03:34,408 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 908 transitions. Word has length 20 [2021-03-10 22:03:34,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:34,408 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 908 transitions. [2021-03-10 22:03:34,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:34,408 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 908 transitions. [2021-03-10 22:03:34,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:34,408 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:34,408 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:34,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3427,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:34,624 INFO L428 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:34,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:34,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1591188771, now seen corresponding path program 361 times [2021-03-10 22:03:34,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:34,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757830077] [2021-03-10 22:03:34,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:34,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:34,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757830077] [2021-03-10 22:03:34,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543601810] [2021-03-10 22:03:34,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:34,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:34,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:34,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:34,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:34,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:34,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:34,805 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 22:03:34,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:03:34,806 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 22:03:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:34,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:34,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:34,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198795453] [2021-03-10 22:03:34,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:34,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:34,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:34,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:34,861 INFO L87 Difference]: Start difference. First operand 303 states and 908 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:35,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:35,087 INFO L93 Difference]: Finished difference Result 481 states and 1401 transitions. [2021-03-10 22:03:35,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:35,087 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:35,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:35,088 INFO L225 Difference]: With dead ends: 481 [2021-03-10 22:03:35,088 INFO L226 Difference]: Without dead ends: 481 [2021-03-10 22:03:35,088 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:03:35,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-03-10 22:03:35,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 306. [2021-03-10 22:03:35,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.0262295081967214) internal successors, (923), 305 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:35,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 923 transitions. [2021-03-10 22:03:35,092 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 923 transitions. Word has length 20 [2021-03-10 22:03:35,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:35,092 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 923 transitions. [2021-03-10 22:03:35,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:35,092 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 923 transitions. [2021-03-10 22:03:35,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:35,093 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:35,093 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:35,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3433 [2021-03-10 22:03:35,293 INFO L428 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:35,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:35,293 INFO L82 PathProgramCache]: Analyzing trace with hash -365948185, now seen corresponding path program 362 times [2021-03-10 22:03:35,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:35,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593635272] [2021-03-10 22:03:35,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:35,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:35,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593635272] [2021-03-10 22:03:35,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838038778] [2021-03-10 22:03:35,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:35,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:35,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:35,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:35,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:35,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:35,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:35,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:35,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:35,474 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 22:03:35,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:03:35,475 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 22:03:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:35,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:35,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:03:35,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951284954] [2021-03-10 22:03:35,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:03:35,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:35,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:03:35,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:03:35,506 INFO L87 Difference]: Start difference. First operand 306 states and 923 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:35,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:35,698 INFO L93 Difference]: Finished difference Result 438 states and 1304 transitions. [2021-03-10 22:03:35,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:35,698 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:35,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:35,699 INFO L225 Difference]: With dead ends: 438 [2021-03-10 22:03:35,699 INFO L226 Difference]: Without dead ends: 438 [2021-03-10 22:03:35,699 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:03:35,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-03-10 22:03:35,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 297. [2021-03-10 22:03:35,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9864864864864864) internal successors, (884), 296 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:35,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 884 transitions. [2021-03-10 22:03:35,703 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 884 transitions. Word has length 20 [2021-03-10 22:03:35,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:35,703 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 884 transitions. [2021-03-10 22:03:35,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:35,703 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 884 transitions. [2021-03-10 22:03:35,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:35,704 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:35,704 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:35,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3441 [2021-03-10 22:03:35,907 INFO L428 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:35,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:35,907 INFO L82 PathProgramCache]: Analyzing trace with hash 254385357, now seen corresponding path program 363 times [2021-03-10 22:03:35,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:35,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012565929] [2021-03-10 22:03:35,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:35,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:35,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012565929] [2021-03-10 22:03:35,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785572455] [2021-03-10 22:03:35,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:36,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:03:36,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:36,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:36,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:36,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:36,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:36,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:36,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279700927] [2021-03-10 22:03:36,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:36,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:36,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:36,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:36,109 INFO L87 Difference]: Start difference. First operand 297 states and 884 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:36,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:36,298 INFO L93 Difference]: Finished difference Result 376 states and 1086 transitions. [2021-03-10 22:03:36,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:36,299 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:36,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:36,299 INFO L225 Difference]: With dead ends: 376 [2021-03-10 22:03:36,299 INFO L226 Difference]: Without dead ends: 376 [2021-03-10 22:03:36,299 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:03:36,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-03-10 22:03:36,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 298. [2021-03-10 22:03:36,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.983164983164983) internal successors, (886), 297 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:36,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 886 transitions. [2021-03-10 22:03:36,303 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 886 transitions. Word has length 20 [2021-03-10 22:03:36,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:36,303 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 886 transitions. [2021-03-10 22:03:36,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:36,303 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 886 transitions. [2021-03-10 22:03:36,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:36,303 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:36,303 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:36,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3448 [2021-03-10 22:03:36,504 INFO L428 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:36,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:36,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1702751599, now seen corresponding path program 364 times [2021-03-10 22:03:36,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:36,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330099687] [2021-03-10 22:03:36,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:36,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330099687] [2021-03-10 22:03:36,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624794329] [2021-03-10 22:03:36,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:36,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:36,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:36,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:36,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:36,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:36,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:36,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326070454] [2021-03-10 22:03:36,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:36,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:36,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:36,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:36,701 INFO L87 Difference]: Start difference. First operand 298 states and 886 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:36,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:36,879 INFO L93 Difference]: Finished difference Result 378 states and 1090 transitions. [2021-03-10 22:03:36,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:36,880 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:36,880 INFO L225 Difference]: With dead ends: 378 [2021-03-10 22:03:36,881 INFO L226 Difference]: Without dead ends: 378 [2021-03-10 22:03:36,881 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:03:36,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-03-10 22:03:36,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 295. [2021-03-10 22:03:36,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9625850340136055) internal successors, (871), 294 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:36,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 871 transitions. [2021-03-10 22:03:36,884 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 871 transitions. Word has length 20 [2021-03-10 22:03:36,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:36,884 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 871 transitions. [2021-03-10 22:03:36,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:36,884 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 871 transitions. [2021-03-10 22:03:36,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:36,885 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:36,885 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:37,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3454,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:37,085 INFO L428 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:37,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:37,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1700125823, now seen corresponding path program 365 times [2021-03-10 22:03:37,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:37,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160056054] [2021-03-10 22:03:37,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:37,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:37,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:37,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160056054] [2021-03-10 22:03:37,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992400866] [2021-03-10 22:03:37,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:37,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:37,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:37,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:37,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:37,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:37,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:37,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746083892] [2021-03-10 22:03:37,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:37,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:37,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:37,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:37,276 INFO L87 Difference]: Start difference. First operand 295 states and 871 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:37,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:37,456 INFO L93 Difference]: Finished difference Result 327 states and 959 transitions. [2021-03-10 22:03:37,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:37,457 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:37,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:37,457 INFO L225 Difference]: With dead ends: 327 [2021-03-10 22:03:37,457 INFO L226 Difference]: Without dead ends: 327 [2021-03-10 22:03:37,457 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:03:37,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-03-10 22:03:37,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 276. [2021-03-10 22:03:37,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.9527272727272726) internal successors, (812), 275 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:37,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 812 transitions. [2021-03-10 22:03:37,460 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 812 transitions. Word has length 20 [2021-03-10 22:03:37,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:37,461 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 812 transitions. [2021-03-10 22:03:37,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:37,461 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 812 transitions. [2021-03-10 22:03:37,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:37,461 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:37,461 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:37,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3459 [2021-03-10 22:03:37,661 INFO L428 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:37,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:37,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1240422079, now seen corresponding path program 366 times [2021-03-10 22:03:37,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:37,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562457921] [2021-03-10 22:03:37,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:37,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562457921] [2021-03-10 22:03:37,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770020533] [2021-03-10 22:03:37,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:37,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:03:37,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:37,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:37,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:37,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:37,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:37,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:37,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843918245] [2021-03-10 22:03:37,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:37,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:37,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:37,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:37,867 INFO L87 Difference]: Start difference. First operand 276 states and 812 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:38,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:38,053 INFO L93 Difference]: Finished difference Result 406 states and 1173 transitions. [2021-03-10 22:03:38,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:38,054 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:38,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:38,054 INFO L225 Difference]: With dead ends: 406 [2021-03-10 22:03:38,054 INFO L226 Difference]: Without dead ends: 406 [2021-03-10 22:03:38,055 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:03:38,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-03-10 22:03:38,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 285. [2021-03-10 22:03:38,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.9964788732394365) internal successors, (851), 284 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:38,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 851 transitions. [2021-03-10 22:03:38,058 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 851 transitions. Word has length 20 [2021-03-10 22:03:38,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:38,058 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 851 transitions. [2021-03-10 22:03:38,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:38,058 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 851 transitions. [2021-03-10 22:03:38,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:38,059 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:38,059 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:38,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3462,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:38,264 INFO L428 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:38,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:38,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1097408261, now seen corresponding path program 367 times [2021-03-10 22:03:38,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:38,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651825050] [2021-03-10 22:03:38,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:38,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:38,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651825050] [2021-03-10 22:03:38,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859689451] [2021-03-10 22:03:38,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:38,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:38,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:38,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:38,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:38,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680515894] [2021-03-10 22:03:38,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:38,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:38,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:38,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:38,475 INFO L87 Difference]: Start difference. First operand 285 states and 851 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:38,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:38,709 INFO L93 Difference]: Finished difference Result 412 states and 1188 transitions. [2021-03-10 22:03:38,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:03:38,709 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:38,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:38,710 INFO L225 Difference]: With dead ends: 412 [2021-03-10 22:03:38,710 INFO L226 Difference]: Without dead ends: 412 [2021-03-10 22:03:38,710 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:38,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-03-10 22:03:38,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 282. [2021-03-10 22:03:38,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.9750889679715304) internal successors, (836), 281 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:38,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 836 transitions. [2021-03-10 22:03:38,713 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 836 transitions. Word has length 20 [2021-03-10 22:03:38,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:38,713 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 836 transitions. [2021-03-10 22:03:38,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:38,714 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 836 transitions. [2021-03-10 22:03:38,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:38,714 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:38,714 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:38,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3468,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:38,915 INFO L428 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:38,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:38,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1100034037, now seen corresponding path program 368 times [2021-03-10 22:03:38,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:38,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618613019] [2021-03-10 22:03:38,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:38,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:38,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618613019] [2021-03-10 22:03:38,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059014539] [2021-03-10 22:03:38,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:39,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:39,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:39,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:39,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:39,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:39,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:39,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377952913] [2021-03-10 22:03:39,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:39,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:39,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:39,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:39,113 INFO L87 Difference]: Start difference. First operand 282 states and 836 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:39,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:39,304 INFO L93 Difference]: Finished difference Result 376 states and 1096 transitions. [2021-03-10 22:03:39,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:39,304 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:39,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:39,305 INFO L225 Difference]: With dead ends: 376 [2021-03-10 22:03:39,305 INFO L226 Difference]: Without dead ends: 376 [2021-03-10 22:03:39,305 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:03:39,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-03-10 22:03:39,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 279. [2021-03-10 22:03:39,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.964028776978417) internal successors, (824), 278 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:39,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 824 transitions. [2021-03-10 22:03:39,308 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 824 transitions. Word has length 20 [2021-03-10 22:03:39,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:39,308 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 824 transitions. [2021-03-10 22:03:39,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:39,309 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 824 transitions. [2021-03-10 22:03:39,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:39,309 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:39,309 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:39,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3474 [2021-03-10 22:03:39,509 INFO L428 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:39,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:39,510 INFO L82 PathProgramCache]: Analyzing trace with hash -419004761, now seen corresponding path program 369 times [2021-03-10 22:03:39,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:39,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771606092] [2021-03-10 22:03:39,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:39,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:39,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771606092] [2021-03-10 22:03:39,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115990290] [2021-03-10 22:03:39,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:39,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:03:39,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:39,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:39,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:39,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:39,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:39,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:03:39,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350258823] [2021-03-10 22:03:39,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:03:39,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:39,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:03:39,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:03:39,689 INFO L87 Difference]: Start difference. First operand 279 states and 824 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:39,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:39,854 INFO L93 Difference]: Finished difference Result 367 states and 1069 transitions. [2021-03-10 22:03:39,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:39,854 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:39,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:39,855 INFO L225 Difference]: With dead ends: 367 [2021-03-10 22:03:39,855 INFO L226 Difference]: Without dead ends: 367 [2021-03-10 22:03:39,855 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:03:39,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-03-10 22:03:39,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 285. [2021-03-10 22:03:39,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.954225352112676) internal successors, (839), 284 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:39,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 839 transitions. [2021-03-10 22:03:39,858 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 839 transitions. Word has length 20 [2021-03-10 22:03:39,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:39,858 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 839 transitions. [2021-03-10 22:03:39,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:39,858 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 839 transitions. [2021-03-10 22:03:39,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:39,859 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:39,859 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:40,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3478,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:40,059 INFO L428 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:40,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:40,059 INFO L82 PathProgramCache]: Analyzing trace with hash 229944241, now seen corresponding path program 370 times [2021-03-10 22:03:40,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:40,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962475838] [2021-03-10 22:03:40,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:40,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:40,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962475838] [2021-03-10 22:03:40,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277916015] [2021-03-10 22:03:40,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:40,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:40,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:40,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:40,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:40,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:40,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:40,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408818118] [2021-03-10 22:03:40,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:40,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:40,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:40,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:40,302 INFO L87 Difference]: Start difference. First operand 285 states and 839 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:40,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:40,661 INFO L93 Difference]: Finished difference Result 577 states and 1610 transitions. [2021-03-10 22:03:40,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:03:40,662 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:40,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:40,663 INFO L225 Difference]: With dead ends: 577 [2021-03-10 22:03:40,663 INFO L226 Difference]: Without dead ends: 577 [2021-03-10 22:03:40,663 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 328.4ms TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:03:40,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-03-10 22:03:40,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 297. [2021-03-10 22:03:40,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.016891891891892) internal successors, (893), 296 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:40,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 893 transitions. [2021-03-10 22:03:40,667 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 893 transitions. Word has length 20 [2021-03-10 22:03:40,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:40,667 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 893 transitions. [2021-03-10 22:03:40,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:40,667 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 893 transitions. [2021-03-10 22:03:40,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:40,667 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:40,667 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:40,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3482 [2021-03-10 22:03:40,868 INFO L428 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:40,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:40,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1263963481, now seen corresponding path program 371 times [2021-03-10 22:03:40,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:40,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019789053] [2021-03-10 22:03:40,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:40,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019789053] [2021-03-10 22:03:40,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274961265] [2021-03-10 22:03:40,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:41,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:03:41,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:41,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:03:41,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:41,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:41,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:41,075 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:41,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:41,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:03:41,079 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:41,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:41,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:41,084 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:41,085 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:41,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:41,088 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:41,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:03:41,091 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:41,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:41,094 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:41,140 INFO L628 ElimStorePlain]: treesize reduction 21, result has 70.0 percent of original size [2021-03-10 22:03:41,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:03:41,141 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:177, output treesize:49 [2021-03-10 22:03:41,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:41,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:41,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:03:41,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037463692] [2021-03-10 22:03:41,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:03:41,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:41,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:03:41,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:03:41,246 INFO L87 Difference]: Start difference. First operand 297 states and 893 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:41,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:41,667 INFO L93 Difference]: Finished difference Result 511 states and 1456 transitions. [2021-03-10 22:03:41,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:41,668 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:41,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:41,669 INFO L225 Difference]: With dead ends: 511 [2021-03-10 22:03:41,669 INFO L226 Difference]: Without dead ends: 505 [2021-03-10 22:03:41,669 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 390.7ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:03:41,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-03-10 22:03:41,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 300. [2021-03-10 22:03:41,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9933110367892977) internal successors, (895), 299 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:41,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 895 transitions. [2021-03-10 22:03:41,673 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 895 transitions. Word has length 20 [2021-03-10 22:03:41,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:41,673 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 895 transitions. [2021-03-10 22:03:41,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:41,673 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 895 transitions. [2021-03-10 22:03:41,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:41,674 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:41,674 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:41,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3490 [2021-03-10 22:03:41,874 INFO L428 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:41,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:41,874 INFO L82 PathProgramCache]: Analyzing trace with hash 981344679, now seen corresponding path program 372 times [2021-03-10 22:03:41,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:41,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777749680] [2021-03-10 22:03:41,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:41,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:41,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777749680] [2021-03-10 22:03:41,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372065492] [2021-03-10 22:03:41,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:42,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:03:42,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:42,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:42,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:42,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:42,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:42,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:42,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432746335] [2021-03-10 22:03:42,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:42,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:42,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:42,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:42,129 INFO L87 Difference]: Start difference. First operand 300 states and 895 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:42,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:42,432 INFO L93 Difference]: Finished difference Result 582 states and 1654 transitions. [2021-03-10 22:03:42,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:42,433 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:42,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:42,434 INFO L225 Difference]: With dead ends: 582 [2021-03-10 22:03:42,434 INFO L226 Difference]: Without dead ends: 582 [2021-03-10 22:03:42,434 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 269.6ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:03:42,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-03-10 22:03:42,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 303. [2021-03-10 22:03:42,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.013245033112583) internal successors, (910), 302 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:42,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2021-03-10 22:03:42,438 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2021-03-10 22:03:42,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:42,438 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2021-03-10 22:03:42,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:42,438 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2021-03-10 22:03:42,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:42,439 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:42,439 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:42,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3504,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:42,639 INFO L428 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:42,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:42,640 INFO L82 PathProgramCache]: Analyzing trace with hash -2021280217, now seen corresponding path program 373 times [2021-03-10 22:03:42,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:42,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944633087] [2021-03-10 22:03:42,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:42,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:42,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944633087] [2021-03-10 22:03:42,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148282628] [2021-03-10 22:03:42,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:42,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:42,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:42,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:42,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:42,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531144573] [2021-03-10 22:03:42,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:42,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:42,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:42,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:42,881 INFO L87 Difference]: Start difference. First operand 303 states and 910 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:43,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:43,208 INFO L93 Difference]: Finished difference Result 551 states and 1587 transitions. [2021-03-10 22:03:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:43,208 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:43,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:43,209 INFO L225 Difference]: With dead ends: 551 [2021-03-10 22:03:43,209 INFO L226 Difference]: Without dead ends: 551 [2021-03-10 22:03:43,209 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:03:43,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-03-10 22:03:43,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 300. [2021-03-10 22:03:43,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9933110367892977) internal successors, (895), 299 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:43,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 895 transitions. [2021-03-10 22:03:43,213 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 895 transitions. Word has length 20 [2021-03-10 22:03:43,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:43,213 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 895 transitions. [2021-03-10 22:03:43,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:43,213 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 895 transitions. [2021-03-10 22:03:43,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:43,214 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:43,214 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:43,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3513 [2021-03-10 22:03:43,414 INFO L428 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:43,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:43,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1002081207, now seen corresponding path program 374 times [2021-03-10 22:03:43,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:43,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899226920] [2021-03-10 22:03:43,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:43,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899226920] [2021-03-10 22:03:43,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612828006] [2021-03-10 22:03:43,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:43,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:43,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:43,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:43,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:43,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:43,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:43,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603353274] [2021-03-10 22:03:43,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:43,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:43,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:43,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:43,651 INFO L87 Difference]: Start difference. First operand 300 states and 895 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:43,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:43,933 INFO L93 Difference]: Finished difference Result 548 states and 1535 transitions. [2021-03-10 22:03:43,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:43,934 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:43,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:43,934 INFO L225 Difference]: With dead ends: 548 [2021-03-10 22:03:43,934 INFO L226 Difference]: Without dead ends: 542 [2021-03-10 22:03:43,935 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 251.0ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:03:43,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-03-10 22:03:43,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 304. [2021-03-10 22:03:43,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0) internal successors, (909), 303 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:43,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 909 transitions. [2021-03-10 22:03:43,939 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 909 transitions. Word has length 20 [2021-03-10 22:03:43,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:43,939 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 909 transitions. [2021-03-10 22:03:43,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:43,939 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 909 transitions. [2021-03-10 22:03:43,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:43,939 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:43,939 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:44,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3521,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:44,140 INFO L428 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:44,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:44,140 INFO L82 PathProgramCache]: Analyzing trace with hash -913342719, now seen corresponding path program 375 times [2021-03-10 22:03:44,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:44,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409300586] [2021-03-10 22:03:44,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:44,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409300586] [2021-03-10 22:03:44,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375186424] [2021-03-10 22:03:44,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:44,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:03:44,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:44,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:44,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:44,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:44,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:44,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105977246] [2021-03-10 22:03:44,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:44,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:44,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:44,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:44,377 INFO L87 Difference]: Start difference. First operand 304 states and 909 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:44,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:44,731 INFO L93 Difference]: Finished difference Result 554 states and 1556 transitions. [2021-03-10 22:03:44,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:03:44,731 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:44,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:44,732 INFO L225 Difference]: With dead ends: 554 [2021-03-10 22:03:44,732 INFO L226 Difference]: Without dead ends: 554 [2021-03-10 22:03:44,732 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 332.3ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:03:44,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-03-10 22:03:44,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 301. [2021-03-10 22:03:44,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.9966666666666666) internal successors, (899), 300 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:44,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 899 transitions. [2021-03-10 22:03:44,736 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 899 transitions. Word has length 20 [2021-03-10 22:03:44,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:44,737 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 899 transitions. [2021-03-10 22:03:44,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:44,737 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 899 transitions. [2021-03-10 22:03:44,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:44,737 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:44,737 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:44,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3530,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:44,947 INFO L428 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:44,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:44,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1131083951, now seen corresponding path program 376 times [2021-03-10 22:03:44,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:44,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675431011] [2021-03-10 22:03:44,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:45,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675431011] [2021-03-10 22:03:45,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251682270] [2021-03-10 22:03:45,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:45,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:45,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:45,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:45,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:45,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:45,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:45,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256186475] [2021-03-10 22:03:45,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:45,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:45,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:45,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:45,188 INFO L87 Difference]: Start difference. First operand 301 states and 899 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:45,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:45,462 INFO L93 Difference]: Finished difference Result 508 states and 1482 transitions. [2021-03-10 22:03:45,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:45,462 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:45,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:45,463 INFO L225 Difference]: With dead ends: 508 [2021-03-10 22:03:45,463 INFO L226 Difference]: Without dead ends: 508 [2021-03-10 22:03:45,463 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 257.4ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:03:45,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-03-10 22:03:45,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 307. [2021-03-10 22:03:45,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.026143790849673) internal successors, (926), 306 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:45,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2021-03-10 22:03:45,467 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 20 [2021-03-10 22:03:45,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:45,467 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2021-03-10 22:03:45,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:45,467 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2021-03-10 22:03:45,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:45,468 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:45,468 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:45,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3539,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:45,668 INFO L428 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:45,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:45,668 INFO L82 PathProgramCache]: Analyzing trace with hash 161258449, now seen corresponding path program 377 times [2021-03-10 22:03:45,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:45,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902461915] [2021-03-10 22:03:45,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:45,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902461915] [2021-03-10 22:03:45,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600367675] [2021-03-10 22:03:45,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:45,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:45,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:45,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:45,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:45,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:45,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:45,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189707321] [2021-03-10 22:03:45,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:45,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:45,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:45,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:45,911 INFO L87 Difference]: Start difference. First operand 307 states and 926 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:46,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:46,181 INFO L93 Difference]: Finished difference Result 502 states and 1464 transitions. [2021-03-10 22:03:46,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:46,182 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:46,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:46,183 INFO L225 Difference]: With dead ends: 502 [2021-03-10 22:03:46,183 INFO L226 Difference]: Without dead ends: 502 [2021-03-10 22:03:46,183 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 270.0ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:03:46,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-03-10 22:03:46,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 304. [2021-03-10 22:03:46,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0066006600660065) internal successors, (911), 303 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:46,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 911 transitions. [2021-03-10 22:03:46,187 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 911 transitions. Word has length 20 [2021-03-10 22:03:46,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:46,187 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 911 transitions. [2021-03-10 22:03:46,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:46,187 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 911 transitions. [2021-03-10 22:03:46,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:46,187 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:46,187 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:46,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3545,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:46,388 INFO L428 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:46,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:46,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1734606587, now seen corresponding path program 378 times [2021-03-10 22:03:46,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:46,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128578390] [2021-03-10 22:03:46,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:46,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128578390] [2021-03-10 22:03:46,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383419713] [2021-03-10 22:03:46,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:46,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:03:46,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:46,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:46,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:46,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:46,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:46,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063505529] [2021-03-10 22:03:46,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:46,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:46,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:46,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:46,622 INFO L87 Difference]: Start difference. First operand 304 states and 911 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:46,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:46,911 INFO L93 Difference]: Finished difference Result 463 states and 1357 transitions. [2021-03-10 22:03:46,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:46,911 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:46,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:46,912 INFO L225 Difference]: With dead ends: 463 [2021-03-10 22:03:46,912 INFO L226 Difference]: Without dead ends: 463 [2021-03-10 22:03:46,912 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 244.6ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:03:46,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-03-10 22:03:46,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 301. [2021-03-10 22:03:46,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.9966666666666666) internal successors, (899), 300 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:46,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 899 transitions. [2021-03-10 22:03:46,915 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 899 transitions. Word has length 20 [2021-03-10 22:03:46,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:46,915 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 899 transitions. [2021-03-10 22:03:46,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:46,915 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 899 transitions. [2021-03-10 22:03:46,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:46,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:46,916 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:47,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3552,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:47,116 INFO L428 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:47,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:47,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1917162695, now seen corresponding path program 379 times [2021-03-10 22:03:47,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:47,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240692037] [2021-03-10 22:03:47,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:47,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:47,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240692037] [2021-03-10 22:03:47,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224691620] [2021-03-10 22:03:47,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:47,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:47,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:47,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:47,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:47,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789844545] [2021-03-10 22:03:47,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:47,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:47,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:47,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:47,348 INFO L87 Difference]: Start difference. First operand 301 states and 899 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:47,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:47,578 INFO L93 Difference]: Finished difference Result 478 states and 1367 transitions. [2021-03-10 22:03:47,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:47,579 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:47,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:47,579 INFO L225 Difference]: With dead ends: 478 [2021-03-10 22:03:47,579 INFO L226 Difference]: Without dead ends: 472 [2021-03-10 22:03:47,579 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 238.3ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:03:47,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-03-10 22:03:47,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 309. [2021-03-10 22:03:47,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0032467532467533) internal successors, (925), 308 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:47,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2021-03-10 22:03:47,583 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2021-03-10 22:03:47,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:47,583 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2021-03-10 22:03:47,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:47,583 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2021-03-10 22:03:47,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:47,583 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:47,584 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:47,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3557,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:47,784 INFO L428 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:47,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:47,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1738769, now seen corresponding path program 380 times [2021-03-10 22:03:47,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:47,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464060954] [2021-03-10 22:03:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:47,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464060954] [2021-03-10 22:03:47,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893587040] [2021-03-10 22:03:47,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:47,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:47,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:47,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:47,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:48,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:48,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:48,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734941363] [2021-03-10 22:03:48,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:48,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:48,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:48,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:48,014 INFO L87 Difference]: Start difference. First operand 309 states and 925 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:48,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:48,338 INFO L93 Difference]: Finished difference Result 484 states and 1388 transitions. [2021-03-10 22:03:48,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:03:48,338 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:48,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:48,339 INFO L225 Difference]: With dead ends: 484 [2021-03-10 22:03:48,339 INFO L226 Difference]: Without dead ends: 484 [2021-03-10 22:03:48,339 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 301.1ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:03:48,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-03-10 22:03:48,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 305. [2021-03-10 22:03:48,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9967105263157894) internal successors, (911), 304 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:48,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 911 transitions. [2021-03-10 22:03:48,342 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 911 transitions. Word has length 20 [2021-03-10 22:03:48,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:48,343 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 911 transitions. [2021-03-10 22:03:48,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:48,343 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 911 transitions. [2021-03-10 22:03:48,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:48,343 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:48,343 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:48,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3564,383 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:48,545 INFO L428 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:48,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:48,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1041974567, now seen corresponding path program 381 times [2021-03-10 22:03:48,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:48,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259494253] [2021-03-10 22:03:48,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:48,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:48,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:48,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259494253] [2021-03-10 22:03:48,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41686705] [2021-03-10 22:03:48,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:48,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:03:48,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:48,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:48,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:48,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:48,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:48,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737984483] [2021-03-10 22:03:48,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:48,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:48,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:48,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:48,784 INFO L87 Difference]: Start difference. First operand 305 states and 911 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:49,017 INFO L93 Difference]: Finished difference Result 459 states and 1338 transitions. [2021-03-10 22:03:49,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:49,018 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:49,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:49,019 INFO L225 Difference]: With dead ends: 459 [2021-03-10 22:03:49,019 INFO L226 Difference]: Without dead ends: 459 [2021-03-10 22:03:49,019 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 243.1ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:03:49,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-03-10 22:03:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 302. [2021-03-10 22:03:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9966777408637872) internal successors, (902), 301 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 902 transitions. [2021-03-10 22:03:49,023 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 902 transitions. Word has length 20 [2021-03-10 22:03:49,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:49,023 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 902 transitions. [2021-03-10 22:03:49,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,023 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 902 transitions. [2021-03-10 22:03:49,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:49,023 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:49,023 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:49,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3570 [2021-03-10 22:03:49,227 INFO L428 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:49,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:49,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1890949637, now seen corresponding path program 382 times [2021-03-10 22:03:49,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:49,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085552593] [2021-03-10 22:03:49,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:49,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085552593] [2021-03-10 22:03:49,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975857533] [2021-03-10 22:03:49,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:49,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:49,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:49,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:49,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:49,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:49,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:49,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437259162] [2021-03-10 22:03:49,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:49,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:49,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:49,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:49,468 INFO L87 Difference]: Start difference. First operand 302 states and 902 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:49,746 INFO L93 Difference]: Finished difference Result 556 states and 1611 transitions. [2021-03-10 22:03:49,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:49,746 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:49,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:49,747 INFO L225 Difference]: With dead ends: 556 [2021-03-10 22:03:49,747 INFO L226 Difference]: Without dead ends: 556 [2021-03-10 22:03:49,748 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 234.1ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:03:49,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-03-10 22:03:49,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 305. [2021-03-10 22:03:49,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9967105263157894) internal successors, (911), 304 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 911 transitions. [2021-03-10 22:03:49,752 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 911 transitions. Word has length 20 [2021-03-10 22:03:49,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:49,752 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 911 transitions. [2021-03-10 22:03:49,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,752 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 911 transitions. [2021-03-10 22:03:49,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:49,752 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:49,752 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:49,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3575,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:49,953 INFO L428 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:49,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:49,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1111675259, now seen corresponding path program 383 times [2021-03-10 22:03:49,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:49,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341979482] [2021-03-10 22:03:49,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:49,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:50,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341979482] [2021-03-10 22:03:50,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285020582] [2021-03-10 22:03:50,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:50,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:50,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:50,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:50,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:50,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:50,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:50,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877460621] [2021-03-10 22:03:50,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:50,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:50,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:50,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:50,186 INFO L87 Difference]: Start difference. First operand 305 states and 911 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:50,462 INFO L93 Difference]: Finished difference Result 558 states and 1615 transitions. [2021-03-10 22:03:50,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:50,463 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:50,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:50,464 INFO L225 Difference]: With dead ends: 558 [2021-03-10 22:03:50,464 INFO L226 Difference]: Without dead ends: 558 [2021-03-10 22:03:50,464 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 235.3ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:03:50,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-03-10 22:03:50,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 302. [2021-03-10 22:03:50,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9767441860465116) internal successors, (896), 301 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 896 transitions. [2021-03-10 22:03:50,468 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 896 transitions. Word has length 20 [2021-03-10 22:03:50,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:50,468 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 896 transitions. [2021-03-10 22:03:50,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,468 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 896 transitions. [2021-03-10 22:03:50,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:50,468 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:50,468 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:50,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3582 [2021-03-10 22:03:50,669 INFO L428 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:50,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:50,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1287427001, now seen corresponding path program 384 times [2021-03-10 22:03:50,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:50,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682517922] [2021-03-10 22:03:50,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:50,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682517922] [2021-03-10 22:03:50,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89783041] [2021-03-10 22:03:50,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:50,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:03:50,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:50,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:50,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:50,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:50,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:03:50,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871258609] [2021-03-10 22:03:50,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:50,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:50,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:50,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:50,913 INFO L87 Difference]: Start difference. First operand 302 states and 896 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:51,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:51,153 INFO L93 Difference]: Finished difference Result 509 states and 1479 transitions. [2021-03-10 22:03:51,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:51,154 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:51,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:51,154 INFO L225 Difference]: With dead ends: 509 [2021-03-10 22:03:51,154 INFO L226 Difference]: Without dead ends: 509 [2021-03-10 22:03:51,155 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 220.6ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:03:51,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-03-10 22:03:51,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 289. [2021-03-10 22:03:51,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.96875) internal successors, (855), 288 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 855 transitions. [2021-03-10 22:03:51,161 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 855 transitions. Word has length 20 [2021-03-10 22:03:51,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:51,162 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 855 transitions. [2021-03-10 22:03:51,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:51,162 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 855 transitions. [2021-03-10 22:03:51,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:51,162 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:51,162 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:51,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3589,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:51,362 INFO L428 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:51,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:51,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1746703769, now seen corresponding path program 385 times [2021-03-10 22:03:51,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:51,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615650644] [2021-03-10 22:03:51,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:51,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615650644] [2021-03-10 22:03:51,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144411637] [2021-03-10 22:03:51,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:51,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:51,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:51,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:51,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:51,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330173810] [2021-03-10 22:03:51,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:51,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:51,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:51,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:51,566 INFO L87 Difference]: Start difference. First operand 289 states and 855 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:51,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:51,797 INFO L93 Difference]: Finished difference Result 544 states and 1551 transitions. [2021-03-10 22:03:51,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:51,797 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:51,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:51,798 INFO L225 Difference]: With dead ends: 544 [2021-03-10 22:03:51,798 INFO L226 Difference]: Without dead ends: 544 [2021-03-10 22:03:51,798 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:51,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-03-10 22:03:51,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 286. [2021-03-10 22:03:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.957894736842105) internal successors, (843), 285 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:51,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 843 transitions. [2021-03-10 22:03:51,802 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 843 transitions. Word has length 20 [2021-03-10 22:03:51,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:51,802 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 843 transitions. [2021-03-10 22:03:51,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:51,802 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 843 transitions. [2021-03-10 22:03:51,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:51,802 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:51,802 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:52,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3593 [2021-03-10 22:03:52,003 INFO L428 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:52,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:52,003 INFO L82 PathProgramCache]: Analyzing trace with hash 7762133, now seen corresponding path program 386 times [2021-03-10 22:03:52,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:52,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169377640] [2021-03-10 22:03:52,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:52,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169377640] [2021-03-10 22:03:52,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143943241] [2021-03-10 22:03:52,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:52,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:52,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:52,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:52,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:52,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:52,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:52,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140733536] [2021-03-10 22:03:52,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:52,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:52,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:52,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:52,219 INFO L87 Difference]: Start difference. First operand 286 states and 843 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:52,451 INFO L93 Difference]: Finished difference Result 442 states and 1250 transitions. [2021-03-10 22:03:52,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:52,451 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:52,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:52,452 INFO L225 Difference]: With dead ends: 442 [2021-03-10 22:03:52,452 INFO L226 Difference]: Without dead ends: 436 [2021-03-10 22:03:52,452 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 207.3ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:52,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-03-10 22:03:52,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 304. [2021-03-10 22:03:52,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9504950495049505) internal successors, (894), 303 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 894 transitions. [2021-03-10 22:03:52,456 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 894 transitions. Word has length 20 [2021-03-10 22:03:52,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:52,456 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 894 transitions. [2021-03-10 22:03:52,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,456 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 894 transitions. [2021-03-10 22:03:52,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:52,456 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:52,456 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:52,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3598,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:52,657 INFO L428 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:52,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:52,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1907661793, now seen corresponding path program 387 times [2021-03-10 22:03:52,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:52,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483061420] [2021-03-10 22:03:52,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:52,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483061420] [2021-03-10 22:03:52,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057501321] [2021-03-10 22:03:52,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:52,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:03:52,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:52,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:52,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:52,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:52,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:52,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957306172] [2021-03-10 22:03:52,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:52,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:52,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:52,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:52,867 INFO L87 Difference]: Start difference. First operand 304 states and 894 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:53,164 INFO L93 Difference]: Finished difference Result 448 states and 1271 transitions. [2021-03-10 22:03:53,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:03:53,165 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:53,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:53,165 INFO L225 Difference]: With dead ends: 448 [2021-03-10 22:03:53,165 INFO L226 Difference]: Without dead ends: 448 [2021-03-10 22:03:53,165 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:03:53,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-03-10 22:03:53,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 302. [2021-03-10 22:03:53,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.953488372093023) internal successors, (889), 301 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 889 transitions. [2021-03-10 22:03:53,169 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 889 transitions. Word has length 20 [2021-03-10 22:03:53,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:53,169 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 889 transitions. [2021-03-10 22:03:53,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,169 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 889 transitions. [2021-03-10 22:03:53,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:53,169 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:53,169 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:53,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3605 [2021-03-10 22:03:53,370 INFO L428 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:53,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:53,370 INFO L82 PathProgramCache]: Analyzing trace with hash -867425995, now seen corresponding path program 388 times [2021-03-10 22:03:53,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:53,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632200032] [2021-03-10 22:03:53,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:53,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632200032] [2021-03-10 22:03:53,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592852995] [2021-03-10 22:03:53,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:53,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:53,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:53,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:53,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:53,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:53,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:03:53,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933189528] [2021-03-10 22:03:53,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:53,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:53,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:53,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:53,577 INFO L87 Difference]: Start difference. First operand 302 states and 889 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:53,823 INFO L93 Difference]: Finished difference Result 431 states and 1243 transitions. [2021-03-10 22:03:53,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:53,823 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:53,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:53,824 INFO L225 Difference]: With dead ends: 431 [2021-03-10 22:03:53,824 INFO L226 Difference]: Without dead ends: 431 [2021-03-10 22:03:53,824 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:53,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-03-10 22:03:53,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 300. [2021-03-10 22:03:53,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9565217391304346) internal successors, (884), 299 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 884 transitions. [2021-03-10 22:03:53,827 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 884 transitions. Word has length 20 [2021-03-10 22:03:53,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:53,827 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 884 transitions. [2021-03-10 22:03:53,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,828 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 884 transitions. [2021-03-10 22:03:53,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:53,828 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:53,828 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:54,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3613,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:54,028 INFO L428 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:54,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:54,029 INFO L82 PathProgramCache]: Analyzing trace with hash 892626945, now seen corresponding path program 389 times [2021-03-10 22:03:54,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:54,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728247509] [2021-03-10 22:03:54,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:54,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728247509] [2021-03-10 22:03:54,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875044182] [2021-03-10 22:03:54,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:54,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:03:54,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:54,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:03:54,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:54,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:03:54,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:54,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:54,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:54,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:03:54,242 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:54,260 INFO L628 ElimStorePlain]: treesize reduction 12, result has 62.5 percent of original size [2021-03-10 22:03:54,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:03:54,260 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:63, output treesize:20 [2021-03-10 22:03:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:54,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:54,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:03:54,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941568835] [2021-03-10 22:03:54,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:03:54,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:54,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:03:54,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:03:54,305 INFO L87 Difference]: Start difference. First operand 300 states and 884 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:54,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:54,591 INFO L93 Difference]: Finished difference Result 456 states and 1297 transitions. [2021-03-10 22:03:54,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:54,591 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:54,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:54,592 INFO L225 Difference]: With dead ends: 456 [2021-03-10 22:03:54,592 INFO L226 Difference]: Without dead ends: 456 [2021-03-10 22:03:54,592 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 247.7ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:03:54,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-03-10 22:03:54,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 288. [2021-03-10 22:03:54,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.9547038327526134) internal successors, (848), 287 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:54,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 848 transitions. [2021-03-10 22:03:54,596 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 848 transitions. Word has length 20 [2021-03-10 22:03:54,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:54,596 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 848 transitions. [2021-03-10 22:03:54,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:54,596 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 848 transitions. [2021-03-10 22:03:54,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:54,596 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:54,596 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:54,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3617 [2021-03-10 22:03:54,796 INFO L428 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:54,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:54,797 INFO L82 PathProgramCache]: Analyzing trace with hash 537179841, now seen corresponding path program 390 times [2021-03-10 22:03:54,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:54,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073985483] [2021-03-10 22:03:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:54,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:54,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073985483] [2021-03-10 22:03:54,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314769484] [2021-03-10 22:03:54,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:54,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:03:54,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:54,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:54,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:55,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:55,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:03:55,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521300494] [2021-03-10 22:03:55,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:03:55,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:55,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:03:55,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:03:55,123 INFO L87 Difference]: Start difference. First operand 288 states and 848 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:55,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:55,506 INFO L93 Difference]: Finished difference Result 369 states and 1060 transitions. [2021-03-10 22:03:55,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:55,507 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:55,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:55,507 INFO L225 Difference]: With dead ends: 369 [2021-03-10 22:03:55,507 INFO L226 Difference]: Without dead ends: 369 [2021-03-10 22:03:55,507 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 436.3ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:03:55,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-03-10 22:03:55,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 297. [2021-03-10 22:03:55,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.983108108108108) internal successors, (883), 296 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:55,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 883 transitions. [2021-03-10 22:03:55,510 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 883 transitions. Word has length 20 [2021-03-10 22:03:55,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:55,511 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 883 transitions. [2021-03-10 22:03:55,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:55,511 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 883 transitions. [2021-03-10 22:03:55,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:55,511 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:55,511 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:55,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3625,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:55,711 INFO L428 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:55,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:55,712 INFO L82 PathProgramCache]: Analyzing trace with hash -956727881, now seen corresponding path program 391 times [2021-03-10 22:03:55,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:55,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366673304] [2021-03-10 22:03:55,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:55,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366673304] [2021-03-10 22:03:55,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817237957] [2021-03-10 22:03:55,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:55,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:55,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:55,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:56,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:56,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:03:56,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888352424] [2021-03-10 22:03:56,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:03:56,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:56,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:03:56,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:03:56,040 INFO L87 Difference]: Start difference. First operand 297 states and 883 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:56,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:56,423 INFO L93 Difference]: Finished difference Result 375 states and 1067 transitions. [2021-03-10 22:03:56,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:56,423 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:56,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:56,424 INFO L225 Difference]: With dead ends: 375 [2021-03-10 22:03:56,424 INFO L226 Difference]: Without dead ends: 369 [2021-03-10 22:03:56,424 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 445.8ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:03:56,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-03-10 22:03:56,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 294. [2021-03-10 22:03:56,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9761092150170647) internal successors, (872), 293 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:56,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 872 transitions. [2021-03-10 22:03:56,427 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 872 transitions. Word has length 20 [2021-03-10 22:03:56,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:56,427 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 872 transitions. [2021-03-10 22:03:56,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:56,427 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 872 transitions. [2021-03-10 22:03:56,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:56,427 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:56,428 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:56,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3637 [2021-03-10 22:03:56,628 INFO L428 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:56,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:56,628 INFO L82 PathProgramCache]: Analyzing trace with hash -418872303, now seen corresponding path program 392 times [2021-03-10 22:03:56,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:56,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474080461] [2021-03-10 22:03:56,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:56,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:56,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474080461] [2021-03-10 22:03:56,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140354435] [2021-03-10 22:03:56,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:56,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:56,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:56,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:56,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:56,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:56,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:03:56,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258835029] [2021-03-10 22:03:56,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:03:56,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:56,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:03:56,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:03:56,922 INFO L87 Difference]: Start difference. First operand 294 states and 872 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:57,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:57,343 INFO L93 Difference]: Finished difference Result 339 states and 985 transitions. [2021-03-10 22:03:57,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:57,343 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:57,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:57,344 INFO L225 Difference]: With dead ends: 339 [2021-03-10 22:03:57,344 INFO L226 Difference]: Without dead ends: 327 [2021-03-10 22:03:57,344 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 429.2ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:03:57,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-03-10 22:03:57,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 291. [2021-03-10 22:03:57,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9689655172413794) internal successors, (861), 290 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:57,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2021-03-10 22:03:57,347 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 20 [2021-03-10 22:03:57,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:57,347 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2021-03-10 22:03:57,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:57,347 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2021-03-10 22:03:57,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:57,347 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:57,347 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:57,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3646,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:57,548 INFO L428 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:57,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:57,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1939210357, now seen corresponding path program 393 times [2021-03-10 22:03:57,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:57,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755634882] [2021-03-10 22:03:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:57,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:57,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755634882] [2021-03-10 22:03:57,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131425933] [2021-03-10 22:03:57,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:57,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:03:57,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:57,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:57,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:57,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:57,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:03:57,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666615986] [2021-03-10 22:03:57,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:03:57,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:57,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:03:57,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:03:57,868 INFO L87 Difference]: Start difference. First operand 291 states and 861 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:58,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:58,154 INFO L93 Difference]: Finished difference Result 456 states and 1278 transitions. [2021-03-10 22:03:58,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:58,155 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:58,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:58,155 INFO L225 Difference]: With dead ends: 456 [2021-03-10 22:03:58,156 INFO L226 Difference]: Without dead ends: 456 [2021-03-10 22:03:58,156 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 347.7ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:03:58,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-03-10 22:03:58,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 299. [2021-03-10 22:03:58,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.01006711409396) internal successors, (897), 298 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:58,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 897 transitions. [2021-03-10 22:03:58,159 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 897 transitions. Word has length 20 [2021-03-10 22:03:58,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:58,159 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 897 transitions. [2021-03-10 22:03:58,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:58,160 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 897 transitions. [2021-03-10 22:03:58,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:58,160 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:58,160 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:58,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3653,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:58,360 INFO L428 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:58,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:58,361 INFO L82 PathProgramCache]: Analyzing trace with hash 861849217, now seen corresponding path program 394 times [2021-03-10 22:03:58,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:58,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698855569] [2021-03-10 22:03:58,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:58,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:58,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:58,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698855569] [2021-03-10 22:03:58,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518594610] [2021-03-10 22:03:58,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:58,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:58,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:58,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:58,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:58,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:58,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:03:58,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212833025] [2021-03-10 22:03:58,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:03:58,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:58,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:03:58,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:03:58,647 INFO L87 Difference]: Start difference. First operand 299 states and 897 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:58,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:58,921 INFO L93 Difference]: Finished difference Result 462 states and 1279 transitions. [2021-03-10 22:03:58,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:58,921 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:58,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:58,922 INFO L225 Difference]: With dead ends: 462 [2021-03-10 22:03:58,922 INFO L226 Difference]: Without dead ends: 456 [2021-03-10 22:03:58,922 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 303.1ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:03:58,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-03-10 22:03:58,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 302. [2021-03-10 22:03:58,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9867109634551494) internal successors, (899), 301 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 899 transitions. [2021-03-10 22:03:58,926 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 899 transitions. Word has length 20 [2021-03-10 22:03:58,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:58,926 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 899 transitions. [2021-03-10 22:03:58,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:58,926 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 899 transitions. [2021-03-10 22:03:58,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:58,926 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:58,926 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:59,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3667 [2021-03-10 22:03:59,127 INFO L428 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:59,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:59,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1187809919, now seen corresponding path program 395 times [2021-03-10 22:03:59,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:59,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954204621] [2021-03-10 22:03:59,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:59,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954204621] [2021-03-10 22:03:59,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792991305] [2021-03-10 22:03:59,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:59,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:03:59,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:59,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:03:59,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:59,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:59,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:03:59,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333701736] [2021-03-10 22:03:59,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:03:59,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:59,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:03:59,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:03:59,417 INFO L87 Difference]: Start difference. First operand 302 states and 899 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:59,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:59,738 INFO L93 Difference]: Finished difference Result 424 states and 1199 transitions. [2021-03-10 22:03:59,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:59,738 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:03:59,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:59,739 INFO L225 Difference]: With dead ends: 424 [2021-03-10 22:03:59,739 INFO L226 Difference]: Without dead ends: 424 [2021-03-10 22:03:59,739 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 303.4ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:03:59,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-03-10 22:03:59,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 295. [2021-03-10 22:03:59,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.996598639455782) internal successors, (881), 294 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:59,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 881 transitions. [2021-03-10 22:03:59,742 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 881 transitions. Word has length 20 [2021-03-10 22:03:59,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:59,742 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 881 transitions. [2021-03-10 22:03:59,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:59,742 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 881 transitions. [2021-03-10 22:03:59,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:03:59,742 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:59,743 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:59,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3682 [2021-03-10 22:03:59,943 INFO L428 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:59,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:59,943 INFO L82 PathProgramCache]: Analyzing trace with hash 104532481, now seen corresponding path program 396 times [2021-03-10 22:03:59,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:59,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771172639] [2021-03-10 22:03:59,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:00,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771172639] [2021-03-10 22:04:00,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988095933] [2021-03-10 22:04:00,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:00,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:04:00,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:00,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:00,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:00,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:00,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:00,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:00,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966218240] [2021-03-10 22:04:00,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:00,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:00,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:00,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:00,243 INFO L87 Difference]: Start difference. First operand 295 states and 881 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:00,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:00,509 INFO L93 Difference]: Finished difference Result 387 states and 1117 transitions. [2021-03-10 22:04:00,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:00,510 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:00,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:00,510 INFO L225 Difference]: With dead ends: 387 [2021-03-10 22:04:00,510 INFO L226 Difference]: Without dead ends: 387 [2021-03-10 22:04:00,510 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 293.9ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:00,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-03-10 22:04:00,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 292. [2021-03-10 22:04:00,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9759450171821307) internal successors, (866), 291 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 866 transitions. [2021-03-10 22:04:00,514 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 866 transitions. Word has length 20 [2021-03-10 22:04:00,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:00,514 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 866 transitions. [2021-03-10 22:04:00,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:00,514 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 866 transitions. [2021-03-10 22:04:00,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:00,514 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:00,514 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:00,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3692 [2021-03-10 22:04:00,715 INFO L428 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:00,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:00,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1167073391, now seen corresponding path program 397 times [2021-03-10 22:04:00,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:00,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036595312] [2021-03-10 22:04:00,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:00,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036595312] [2021-03-10 22:04:00,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624496809] [2021-03-10 22:04:00,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:00,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:00,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:01,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:01,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:01,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083916573] [2021-03-10 22:04:01,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:01,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:01,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:01,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:01,041 INFO L87 Difference]: Start difference. First operand 292 states and 866 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:01,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:01,367 INFO L93 Difference]: Finished difference Result 424 states and 1191 transitions. [2021-03-10 22:04:01,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:01,367 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:01,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:01,368 INFO L225 Difference]: With dead ends: 424 [2021-03-10 22:04:01,368 INFO L226 Difference]: Without dead ends: 418 [2021-03-10 22:04:01,368 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 355.7ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:01,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-03-10 22:04:01,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 302. [2021-03-10 22:04:01,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.9667774086378738) internal successors, (893), 301 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:01,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 893 transitions. [2021-03-10 22:04:01,371 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 893 transitions. Word has length 20 [2021-03-10 22:04:01,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:01,371 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 893 transitions. [2021-03-10 22:04:01,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:01,372 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 893 transitions. [2021-03-10 22:04:01,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:01,372 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:01,372 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:01,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3701,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:01,572 INFO L428 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:01,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:01,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1212469979, now seen corresponding path program 398 times [2021-03-10 22:04:01,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:01,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246179368] [2021-03-10 22:04:01,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:01,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246179368] [2021-03-10 22:04:01,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183590276] [2021-03-10 22:04:01,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:01,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:01,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:01,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:01,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:01,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:01,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:01,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634097025] [2021-03-10 22:04:01,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:01,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:01,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:01,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:01,898 INFO L87 Difference]: Start difference. First operand 302 states and 893 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:02,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:02,212 INFO L93 Difference]: Finished difference Result 401 states and 1152 transitions. [2021-03-10 22:04:02,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:02,213 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:02,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:02,213 INFO L225 Difference]: With dead ends: 401 [2021-03-10 22:04:02,213 INFO L226 Difference]: Without dead ends: 401 [2021-03-10 22:04:02,213 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 344.0ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:02,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-03-10 22:04:02,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 291. [2021-03-10 22:04:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9689655172413794) internal successors, (861), 290 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:02,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2021-03-10 22:04:02,217 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 20 [2021-03-10 22:04:02,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:02,217 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2021-03-10 22:04:02,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:02,217 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2021-03-10 22:04:02,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:02,217 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:02,217 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:02,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3714,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:02,418 INFO L428 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:02,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:02,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1109036289, now seen corresponding path program 399 times [2021-03-10 22:04:02,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:02,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354098663] [2021-03-10 22:04:02,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:02,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354098663] [2021-03-10 22:04:02,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540123544] [2021-03-10 22:04:02,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:02,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:04:02,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:02,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:02,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:02,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:02,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:02,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:02,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850219261] [2021-03-10 22:04:02,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:02,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:02,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:02,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:02,732 INFO L87 Difference]: Start difference. First operand 291 states and 861 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:03,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:03,134 INFO L93 Difference]: Finished difference Result 341 states and 989 transitions. [2021-03-10 22:04:03,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:03,135 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:03,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:03,135 INFO L225 Difference]: With dead ends: 341 [2021-03-10 22:04:03,135 INFO L226 Difference]: Without dead ends: 329 [2021-03-10 22:04:03,136 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 435.2ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:03,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-03-10 22:04:03,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 293. [2021-03-10 22:04:03,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.9657534246575343) internal successors, (866), 292 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:03,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 866 transitions. [2021-03-10 22:04:03,139 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 866 transitions. Word has length 20 [2021-03-10 22:04:03,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:03,139 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 866 transitions. [2021-03-10 22:04:03,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:03,139 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 866 transitions. [2021-03-10 22:04:03,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:03,139 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:03,139 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:03,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3728 [2021-03-10 22:04:03,340 INFO L428 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:03,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:03,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1860436727, now seen corresponding path program 400 times [2021-03-10 22:04:03,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:03,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594224387] [2021-03-10 22:04:03,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:03,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594224387] [2021-03-10 22:04:03,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429438196] [2021-03-10 22:04:03,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:03,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:03,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:03,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:03,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:03,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:03,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:03,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33768932] [2021-03-10 22:04:03,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:03,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:03,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:03,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:03,620 INFO L87 Difference]: Start difference. First operand 293 states and 866 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:04,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:04,032 INFO L93 Difference]: Finished difference Result 366 states and 1041 transitions. [2021-03-10 22:04:04,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:04:04,032 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:04,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:04,032 INFO L225 Difference]: With dead ends: 366 [2021-03-10 22:04:04,033 INFO L226 Difference]: Without dead ends: 360 [2021-03-10 22:04:04,033 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 396.1ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:04:04,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-03-10 22:04:04,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 303. [2021-03-10 22:04:04,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.956953642384106) internal successors, (893), 302 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:04,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 893 transitions. [2021-03-10 22:04:04,036 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 893 transitions. Word has length 20 [2021-03-10 22:04:04,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:04,036 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 893 transitions. [2021-03-10 22:04:04,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:04,036 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 893 transitions. [2021-03-10 22:04:04,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:04,036 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:04,037 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:04,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3736,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:04,237 INFO L428 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:04,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:04,237 INFO L82 PathProgramCache]: Analyzing trace with hash -54987199, now seen corresponding path program 401 times [2021-03-10 22:04:04,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:04,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783538841] [2021-03-10 22:04:04,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:04,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:04,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783538841] [2021-03-10 22:04:04,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299938084] [2021-03-10 22:04:04,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:04,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:04:04,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:04,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:04,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:04,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:04,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:04,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714293038] [2021-03-10 22:04:04,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:04,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:04,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:04,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:04,514 INFO L87 Difference]: Start difference. First operand 303 states and 893 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:04,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:04,860 INFO L93 Difference]: Finished difference Result 337 states and 987 transitions. [2021-03-10 22:04:04,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:04,861 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:04,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:04,861 INFO L225 Difference]: With dead ends: 337 [2021-03-10 22:04:04,861 INFO L226 Difference]: Without dead ends: 337 [2021-03-10 22:04:04,861 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 349.6ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:04,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-03-10 22:04:04,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 290. [2021-03-10 22:04:04,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.961937716262976) internal successors, (856), 289 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:04,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2021-03-10 22:04:04,864 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2021-03-10 22:04:04,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:04,864 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2021-03-10 22:04:04,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:04,865 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2021-03-10 22:04:04,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:04,865 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:04,865 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:05,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3748,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:05,065 INFO L428 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:05,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:05,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1294978849, now seen corresponding path program 402 times [2021-03-10 22:04:05,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:05,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313209192] [2021-03-10 22:04:05,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:05,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313209192] [2021-03-10 22:04:05,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573551468] [2021-03-10 22:04:05,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:05,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:04:05,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:05,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:05,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:05,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:05,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:05,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28199410] [2021-03-10 22:04:05,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:05,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:05,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:05,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:05,343 INFO L87 Difference]: Start difference. First operand 290 states and 856 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:05,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:05,634 INFO L93 Difference]: Finished difference Result 466 states and 1292 transitions. [2021-03-10 22:04:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:04:05,634 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:05,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:05,635 INFO L225 Difference]: With dead ends: 466 [2021-03-10 22:04:05,635 INFO L226 Difference]: Without dead ends: 466 [2021-03-10 22:04:05,635 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 281.0ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:05,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-03-10 22:04:05,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 300. [2021-03-10 22:04:05,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.0133779264214047) internal successors, (901), 299 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:05,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 901 transitions. [2021-03-10 22:04:05,639 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 901 transitions. Word has length 20 [2021-03-10 22:04:05,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:05,639 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 901 transitions. [2021-03-10 22:04:05,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:05,639 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 901 transitions. [2021-03-10 22:04:05,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:05,639 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:05,640 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:05,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3758 [2021-03-10 22:04:05,840 INFO L428 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:05,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:05,840 INFO L82 PathProgramCache]: Analyzing trace with hash -198928873, now seen corresponding path program 403 times [2021-03-10 22:04:05,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:05,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702400910] [2021-03-10 22:04:05,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:05,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:05,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702400910] [2021-03-10 22:04:05,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298351548] [2021-03-10 22:04:05,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:05,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:05,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:06,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:06,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:06,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894450909] [2021-03-10 22:04:06,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:06,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:06,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:06,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:06,107 INFO L87 Difference]: Start difference. First operand 300 states and 901 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:06,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:06,346 INFO L93 Difference]: Finished difference Result 420 states and 1190 transitions. [2021-03-10 22:04:06,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:06,347 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:06,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:06,347 INFO L225 Difference]: With dead ends: 420 [2021-03-10 22:04:06,348 INFO L226 Difference]: Without dead ends: 414 [2021-03-10 22:04:06,348 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 210.3ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:06,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-03-10 22:04:06,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 303. [2021-03-10 22:04:06,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9900662251655628) internal successors, (903), 302 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:06,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2021-03-10 22:04:06,351 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2021-03-10 22:04:06,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:06,351 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2021-03-10 22:04:06,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:06,351 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2021-03-10 22:04:06,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:06,352 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:06,352 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:06,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3769,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:06,552 INFO L428 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:06,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:06,553 INFO L82 PathProgramCache]: Analyzing trace with hash 2046379287, now seen corresponding path program 404 times [2021-03-10 22:04:06,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:06,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692047672] [2021-03-10 22:04:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:06,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:06,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692047672] [2021-03-10 22:04:06,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624096910] [2021-03-10 22:04:06,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:06,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:06,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:06,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:06,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:06,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:06,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:06,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606831137] [2021-03-10 22:04:06,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:06,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:06,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:06,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:06,833 INFO L87 Difference]: Start difference. First operand 303 states and 903 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:07,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:07,080 INFO L93 Difference]: Finished difference Result 472 states and 1332 transitions. [2021-03-10 22:04:07,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:07,080 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:07,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:07,081 INFO L225 Difference]: With dead ends: 472 [2021-03-10 22:04:07,081 INFO L226 Difference]: Without dead ends: 472 [2021-03-10 22:04:07,081 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:07,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-03-10 22:04:07,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 306. [2021-03-10 22:04:07,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.0098360655737704) internal successors, (918), 305 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:07,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 918 transitions. [2021-03-10 22:04:07,085 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 918 transitions. Word has length 20 [2021-03-10 22:04:07,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:07,085 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 918 transitions. [2021-03-10 22:04:07,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 918 transitions. [2021-03-10 22:04:07,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:07,086 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:07,086 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:07,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3779 [2021-03-10 22:04:07,301 INFO L428 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:07,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:07,302 INFO L82 PathProgramCache]: Analyzing trace with hash -956245609, now seen corresponding path program 405 times [2021-03-10 22:04:07,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:07,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115076521] [2021-03-10 22:04:07,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:07,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115076521] [2021-03-10 22:04:07,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354377772] [2021-03-10 22:04:07,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:07,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:04:07,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:07,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:07,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:07,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:07,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:07,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561902572] [2021-03-10 22:04:07,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:07,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:07,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:07,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:07,582 INFO L87 Difference]: Start difference. First operand 306 states and 918 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:07,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:07,813 INFO L93 Difference]: Finished difference Result 435 states and 1250 transitions. [2021-03-10 22:04:07,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:07,813 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:07,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:07,814 INFO L225 Difference]: With dead ends: 435 [2021-03-10 22:04:07,814 INFO L226 Difference]: Without dead ends: 435 [2021-03-10 22:04:07,814 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 217.5ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:07,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-03-10 22:04:07,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 303. [2021-03-10 22:04:07,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9900662251655628) internal successors, (903), 302 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:07,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2021-03-10 22:04:07,818 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2021-03-10 22:04:07,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:07,818 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2021-03-10 22:04:07,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:07,818 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2021-03-10 22:04:07,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:07,818 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:07,818 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:08,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3789,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:08,019 INFO L428 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:08,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:08,019 INFO L82 PathProgramCache]: Analyzing trace with hash 2067115815, now seen corresponding path program 406 times [2021-03-10 22:04:08,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:08,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065933294] [2021-03-10 22:04:08,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:08,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065933294] [2021-03-10 22:04:08,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132430966] [2021-03-10 22:04:08,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:08,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:08,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:08,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:08,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:08,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:08,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:08,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:08,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818433672] [2021-03-10 22:04:08,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:08,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:08,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:08,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:08,276 INFO L87 Difference]: Start difference. First operand 303 states and 903 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:08,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:08,466 INFO L93 Difference]: Finished difference Result 460 states and 1284 transitions. [2021-03-10 22:04:08,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:08,467 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:08,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:08,467 INFO L225 Difference]: With dead ends: 460 [2021-03-10 22:04:08,467 INFO L226 Difference]: Without dead ends: 454 [2021-03-10 22:04:08,467 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 209.3ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:08,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-03-10 22:04:08,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 307. [2021-03-10 22:04:08,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.996732026143791) internal successors, (917), 306 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:08,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 917 transitions. [2021-03-10 22:04:08,475 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 917 transitions. Word has length 20 [2021-03-10 22:04:08,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:08,475 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 917 transitions. [2021-03-10 22:04:08,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:08,475 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 917 transitions. [2021-03-10 22:04:08,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:08,475 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:08,475 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:08,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3798,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:08,676 INFO L428 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:08,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:08,676 INFO L82 PathProgramCache]: Analyzing trace with hash 151691889, now seen corresponding path program 407 times [2021-03-10 22:04:08,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:08,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776801576] [2021-03-10 22:04:08,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:08,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:08,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776801576] [2021-03-10 22:04:08,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546398918] [2021-03-10 22:04:08,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:08,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:04:08,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:08,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:08,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:08,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:08,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:08,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194230108] [2021-03-10 22:04:08,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:08,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:08,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:08,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:08,930 INFO L87 Difference]: Start difference. First operand 307 states and 917 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:09,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:09,203 INFO L93 Difference]: Finished difference Result 466 states and 1305 transitions. [2021-03-10 22:04:09,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:04:09,203 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:09,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:09,204 INFO L225 Difference]: With dead ends: 466 [2021-03-10 22:04:09,204 INFO L226 Difference]: Without dead ends: 466 [2021-03-10 22:04:09,204 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 242.2ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:09,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-03-10 22:04:09,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 304. [2021-03-10 22:04:09,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9933993399339935) internal successors, (907), 303 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:09,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 907 transitions. [2021-03-10 22:04:09,208 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 907 transitions. Word has length 20 [2021-03-10 22:04:09,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:09,208 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 907 transitions. [2021-03-10 22:04:09,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:09,208 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 907 transitions. [2021-03-10 22:04:09,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:09,208 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:09,209 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:09,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3809 [2021-03-10 22:04:09,409 INFO L428 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:09,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:09,409 INFO L82 PathProgramCache]: Analyzing trace with hash -66049343, now seen corresponding path program 408 times [2021-03-10 22:04:09,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:09,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861811219] [2021-03-10 22:04:09,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:09,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861811219] [2021-03-10 22:04:09,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87829678] [2021-03-10 22:04:09,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:09,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:04:09,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:09,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:09,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:09,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:09,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:09,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777114463] [2021-03-10 22:04:09,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:09,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:09,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:09,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:09,710 INFO L87 Difference]: Start difference. First operand 304 states and 907 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:09,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:09,914 INFO L93 Difference]: Finished difference Result 396 states and 1150 transitions. [2021-03-10 22:04:09,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:09,915 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:09,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:09,915 INFO L225 Difference]: With dead ends: 396 [2021-03-10 22:04:09,915 INFO L226 Difference]: Without dead ends: 396 [2021-03-10 22:04:09,915 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 230.1ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:09,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-03-10 22:04:09,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 305. [2021-03-10 22:04:09,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9901315789473686) internal successors, (909), 304 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:09,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 909 transitions. [2021-03-10 22:04:09,919 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 909 transitions. Word has length 20 [2021-03-10 22:04:09,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:09,919 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 909 transitions. [2021-03-10 22:04:09,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:09,919 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 909 transitions. [2021-03-10 22:04:09,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:09,919 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:09,919 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:10,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3819 [2021-03-10 22:04:10,120 INFO L428 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:10,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:10,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1226293057, now seen corresponding path program 409 times [2021-03-10 22:04:10,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:10,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554404081] [2021-03-10 22:04:10,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:10,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554404081] [2021-03-10 22:04:10,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483168646] [2021-03-10 22:04:10,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:10,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:10,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:10,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:10,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:10,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:10,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197360843] [2021-03-10 22:04:10,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:10,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:10,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:10,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:10,402 INFO L87 Difference]: Start difference. First operand 305 states and 909 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:10,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:10,593 INFO L93 Difference]: Finished difference Result 384 states and 1117 transitions. [2021-03-10 22:04:10,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:10,593 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:10,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:10,594 INFO L225 Difference]: With dead ends: 384 [2021-03-10 22:04:10,594 INFO L226 Difference]: Without dead ends: 384 [2021-03-10 22:04:10,594 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 222.5ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:10,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-03-10 22:04:10,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 294. [2021-03-10 22:04:10,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9761092150170647) internal successors, (872), 293 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:10,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 872 transitions. [2021-03-10 22:04:10,597 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 872 transitions. Word has length 20 [2021-03-10 22:04:10,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:10,597 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 872 transitions. [2021-03-10 22:04:10,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:10,598 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 872 transitions. [2021-03-10 22:04:10,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:10,598 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:10,598 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:10,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3826 [2021-03-10 22:04:10,798 INFO L428 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:10,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:10,799 INFO L82 PathProgramCache]: Analyzing trace with hash -669571979, now seen corresponding path program 410 times [2021-03-10 22:04:10,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:10,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110773025] [2021-03-10 22:04:10,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:10,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110773025] [2021-03-10 22:04:10,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57549184] [2021-03-10 22:04:10,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:10,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:10,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:10,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:10,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:11,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:11,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:11,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080819891] [2021-03-10 22:04:11,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:11,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:11,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:11,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:11,072 INFO L87 Difference]: Start difference. First operand 294 states and 872 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:11,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:11,300 INFO L93 Difference]: Finished difference Result 339 states and 995 transitions. [2021-03-10 22:04:11,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:11,300 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:11,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:11,301 INFO L225 Difference]: With dead ends: 339 [2021-03-10 22:04:11,301 INFO L226 Difference]: Without dead ends: 339 [2021-03-10 22:04:11,301 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 217.7ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:11,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-03-10 22:04:11,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 291. [2021-03-10 22:04:11,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9655172413793105) internal successors, (860), 290 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:11,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 860 transitions. [2021-03-10 22:04:11,304 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 860 transitions. Word has length 20 [2021-03-10 22:04:11,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:11,304 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 860 transitions. [2021-03-10 22:04:11,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:11,304 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 860 transitions. [2021-03-10 22:04:11,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:11,305 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:11,305 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:11,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3833,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:11,505 INFO L428 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:11,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:11,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1312769993, now seen corresponding path program 411 times [2021-03-10 22:04:11,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:11,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921979516] [2021-03-10 22:04:11,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:11,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:11,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921979516] [2021-03-10 22:04:11,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291422571] [2021-03-10 22:04:11,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:11,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:04:11,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:11,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:11,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:11,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:11,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:11,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068380074] [2021-03-10 22:04:11,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:11,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:11,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:11,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:11,764 INFO L87 Difference]: Start difference. First operand 291 states and 860 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:11,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:11,983 INFO L93 Difference]: Finished difference Result 384 states and 1089 transitions. [2021-03-10 22:04:11,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:11,983 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:11,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:11,984 INFO L225 Difference]: With dead ends: 384 [2021-03-10 22:04:11,984 INFO L226 Difference]: Without dead ends: 378 [2021-03-10 22:04:11,984 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 209.4ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:11,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-03-10 22:04:11,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 305. [2021-03-10 22:04:11,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9572368421052633) internal successors, (899), 304 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:11,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 899 transitions. [2021-03-10 22:04:11,987 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 899 transitions. Word has length 20 [2021-03-10 22:04:11,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:11,987 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 899 transitions. [2021-03-10 22:04:11,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:11,987 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 899 transitions. [2021-03-10 22:04:11,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:11,988 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:11,988 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:12,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3838 [2021-03-10 22:04:12,188 INFO L428 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:12,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:12,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1066773377, now seen corresponding path program 412 times [2021-03-10 22:04:12,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:12,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127661334] [2021-03-10 22:04:12,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:12,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:12,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127661334] [2021-03-10 22:04:12,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859302586] [2021-03-10 22:04:12,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:12,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:12,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:12,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:12,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:12,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:12,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:12,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181515107] [2021-03-10 22:04:12,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:12,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:12,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:12,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:12,444 INFO L87 Difference]: Start difference. First operand 305 states and 899 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:12,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:12,653 INFO L93 Difference]: Finished difference Result 390 states and 1110 transitions. [2021-03-10 22:04:12,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:04:12,653 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:12,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:12,654 INFO L225 Difference]: With dead ends: 390 [2021-03-10 22:04:12,654 INFO L226 Difference]: Without dead ends: 390 [2021-03-10 22:04:12,654 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:12,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-03-10 22:04:12,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 303. [2021-03-10 22:04:12,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9602649006622515) internal successors, (894), 302 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:12,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 894 transitions. [2021-03-10 22:04:12,657 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 894 transitions. Word has length 20 [2021-03-10 22:04:12,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:12,657 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 894 transitions. [2021-03-10 22:04:12,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:12,657 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 894 transitions. [2021-03-10 22:04:12,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:12,658 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:12,658 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:12,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3847 [2021-03-10 22:04:12,858 INFO L428 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:12,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:12,858 INFO L82 PathProgramCache]: Analyzing trace with hash 2107009175, now seen corresponding path program 413 times [2021-03-10 22:04:12,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:12,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309684402] [2021-03-10 22:04:12,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:12,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309684402] [2021-03-10 22:04:12,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044144779] [2021-03-10 22:04:12,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:12,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:04:12,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:13,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:04:13,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:13,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:13,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:13,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:04:13,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:13,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:04:13,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:13,117 INFO L628 ElimStorePlain]: treesize reduction 12, result has 62.5 percent of original size [2021-03-10 22:04:13,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:04:13,118 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:63, output treesize:20 [2021-03-10 22:04:13,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:13,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:13,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:04:13,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413365075] [2021-03-10 22:04:13,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:04:13,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:13,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:04:13,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:04:13,167 INFO L87 Difference]: Start difference. First operand 303 states and 894 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:13,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:13,457 INFO L93 Difference]: Finished difference Result 359 states and 1045 transitions. [2021-03-10 22:04:13,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:13,457 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:13,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:13,457 INFO L225 Difference]: With dead ends: 359 [2021-03-10 22:04:13,458 INFO L226 Difference]: Without dead ends: 359 [2021-03-10 22:04:13,458 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 277.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:04:13,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-03-10 22:04:13,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 290. [2021-03-10 22:04:13,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.961937716262976) internal successors, (856), 289 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:13,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2021-03-10 22:04:13,461 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2021-03-10 22:04:13,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:13,461 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2021-03-10 22:04:13,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:13,461 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2021-03-10 22:04:13,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:13,461 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:13,461 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:13,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3856,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:13,662 INFO L428 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:13,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:13,662 INFO L82 PathProgramCache]: Analyzing trace with hash -588208655, now seen corresponding path program 414 times [2021-03-10 22:04:13,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:13,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933261178] [2021-03-10 22:04:13,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:13,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:13,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:13,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933261178] [2021-03-10 22:04:13,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247160919] [2021-03-10 22:04:13,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:13,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:04:13,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:13,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:13,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:13,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:13,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:04:13,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238195886] [2021-03-10 22:04:13,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:04:13,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:13,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:04:13,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:13,901 INFO L87 Difference]: Start difference. First operand 290 states and 856 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:14,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:14,179 INFO L93 Difference]: Finished difference Result 331 states and 961 transitions. [2021-03-10 22:04:14,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:14,179 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:14,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:14,180 INFO L225 Difference]: With dead ends: 331 [2021-03-10 22:04:14,180 INFO L226 Difference]: Without dead ends: 319 [2021-03-10 22:04:14,180 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 299.9ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:14,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-03-10 22:04:14,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 294. [2021-03-10 22:04:14,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.955631399317406) internal successors, (866), 293 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:14,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2021-03-10 22:04:14,183 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2021-03-10 22:04:14,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:14,183 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2021-03-10 22:04:14,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:14,183 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2021-03-10 22:04:14,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:14,183 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:14,183 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:14,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3862,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:14,384 INFO L428 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:14,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:14,384 INFO L82 PathProgramCache]: Analyzing trace with hash 163191783, now seen corresponding path program 415 times [2021-03-10 22:04:14,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:14,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364633195] [2021-03-10 22:04:14,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:14,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364633195] [2021-03-10 22:04:14,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559513730] [2021-03-10 22:04:14,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:14,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:14,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:14,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:14,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:04:14,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064571282] [2021-03-10 22:04:14,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:04:14,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:14,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:04:14,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:14,633 INFO L87 Difference]: Start difference. First operand 294 states and 866 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:14,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:14,932 INFO L93 Difference]: Finished difference Result 356 states and 1013 transitions. [2021-03-10 22:04:14,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:04:14,932 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:14,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:14,933 INFO L225 Difference]: With dead ends: 356 [2021-03-10 22:04:14,933 INFO L226 Difference]: Without dead ends: 350 [2021-03-10 22:04:14,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 288.9ms TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:14,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-03-10 22:04:14,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 304. [2021-03-10 22:04:14,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.947194719471947) internal successors, (893), 303 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:14,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 893 transitions. [2021-03-10 22:04:14,936 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 893 transitions. Word has length 20 [2021-03-10 22:04:14,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:14,936 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 893 transitions. [2021-03-10 22:04:14,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:14,936 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 893 transitions. [2021-03-10 22:04:14,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:14,937 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:14,937 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:15,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3867,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:15,137 INFO L428 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:15,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:15,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1752232143, now seen corresponding path program 416 times [2021-03-10 22:04:15,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:15,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613595760] [2021-03-10 22:04:15,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:15,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:15,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613595760] [2021-03-10 22:04:15,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393077675] [2021-03-10 22:04:15,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:15,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:15,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:15,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:15,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:15,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:15,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:04:15,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839274685] [2021-03-10 22:04:15,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:04:15,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:15,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:04:15,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:15,378 INFO L87 Difference]: Start difference. First operand 304 states and 893 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:15,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:15,608 INFO L93 Difference]: Finished difference Result 327 states and 959 transitions. [2021-03-10 22:04:15,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:15,608 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:15,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:15,609 INFO L225 Difference]: With dead ends: 327 [2021-03-10 22:04:15,609 INFO L226 Difference]: Without dead ends: 327 [2021-03-10 22:04:15,609 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 252.3ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:15,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-03-10 22:04:15,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 292. [2021-03-10 22:04:15,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9587628865979383) internal successors, (861), 291 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:15,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2021-03-10 22:04:15,612 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2021-03-10 22:04:15,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:15,612 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2021-03-10 22:04:15,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:15,612 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2021-03-10 22:04:15,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:15,612 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:15,613 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:15,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3874 [2021-03-10 22:04:15,813 INFO L428 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:15,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:15,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1949236847, now seen corresponding path program 417 times [2021-03-10 22:04:15,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:15,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567702687] [2021-03-10 22:04:15,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:15,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:15,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567702687] [2021-03-10 22:04:15,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578746571] [2021-03-10 22:04:15,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:15,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:04:15,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:15,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:15,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:16,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:16,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:04:16,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132093715] [2021-03-10 22:04:16,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:04:16,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:16,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:04:16,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:16,045 INFO L87 Difference]: Start difference. First operand 292 states and 861 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:16,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:16,259 INFO L93 Difference]: Finished difference Result 362 states and 1028 transitions. [2021-03-10 22:04:16,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:16,259 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:16,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:16,260 INFO L225 Difference]: With dead ends: 362 [2021-03-10 22:04:16,260 INFO L226 Difference]: Without dead ends: 356 [2021-03-10 22:04:16,260 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:16,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-03-10 22:04:16,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 306. [2021-03-10 22:04:16,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9508196721311477) internal successors, (900), 305 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:16,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 900 transitions. [2021-03-10 22:04:16,263 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 900 transitions. Word has length 20 [2021-03-10 22:04:16,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:16,263 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 900 transitions. [2021-03-10 22:04:16,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:16,264 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 900 transitions. [2021-03-10 22:04:16,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:16,264 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:16,264 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:16,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3878,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:16,464 INFO L428 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:16,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:16,465 INFO L82 PathProgramCache]: Analyzing trace with hash 430306523, now seen corresponding path program 418 times [2021-03-10 22:04:16,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:16,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537780444] [2021-03-10 22:04:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:16,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537780444] [2021-03-10 22:04:16,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475448223] [2021-03-10 22:04:16,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:16,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:16,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:16,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:16,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:16,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:16,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:04:16,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878315505] [2021-03-10 22:04:16,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:04:16,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:16,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:04:16,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:16,695 INFO L87 Difference]: Start difference. First operand 306 states and 900 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:16,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:16,919 INFO L93 Difference]: Finished difference Result 362 states and 1034 transitions. [2021-03-10 22:04:16,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:04:16,919 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:16,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:16,920 INFO L225 Difference]: With dead ends: 362 [2021-03-10 22:04:16,920 INFO L226 Difference]: Without dead ends: 362 [2021-03-10 22:04:16,920 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 196.8ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:16,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-03-10 22:04:16,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 304. [2021-03-10 22:04:16,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.953795379537954) internal successors, (895), 303 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 895 transitions. [2021-03-10 22:04:16,923 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 895 transitions. Word has length 20 [2021-03-10 22:04:16,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:16,923 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 895 transitions. [2021-03-10 22:04:16,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:16,923 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 895 transitions. [2021-03-10 22:04:16,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:16,924 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:16,924 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:17,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3884,421 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:17,124 INFO L428 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:17,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:17,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1470542321, now seen corresponding path program 419 times [2021-03-10 22:04:17,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:17,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179872210] [2021-03-10 22:04:17,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:17,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179872210] [2021-03-10 22:04:17,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958426215] [2021-03-10 22:04:17,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:17,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:04:17,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:17,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:04:17,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:17,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:17,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:17,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:04:17,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:17,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:04:17,350 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:17,368 INFO L628 ElimStorePlain]: treesize reduction 12, result has 62.5 percent of original size [2021-03-10 22:04:17,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:04:17,369 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:63, output treesize:20 [2021-03-10 22:04:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:17,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:17,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:04:17,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659985980] [2021-03-10 22:04:17,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:17,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:17,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:17,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:17,412 INFO L87 Difference]: Start difference. First operand 304 states and 895 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:17,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:17,663 INFO L93 Difference]: Finished difference Result 337 states and 984 transitions. [2021-03-10 22:04:17,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:17,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:17,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:17,664 INFO L225 Difference]: With dead ends: 337 [2021-03-10 22:04:17,664 INFO L226 Difference]: Without dead ends: 337 [2021-03-10 22:04:17,664 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 240.2ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:17,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-03-10 22:04:17,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 289. [2021-03-10 22:04:17,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.9583333333333335) internal successors, (852), 288 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:17,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 852 transitions. [2021-03-10 22:04:17,667 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 852 transitions. Word has length 20 [2021-03-10 22:04:17,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:17,667 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 852 transitions. [2021-03-10 22:04:17,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:17,667 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 852 transitions. [2021-03-10 22:04:17,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:17,667 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:17,667 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:17,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 422 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3890 [2021-03-10 22:04:17,868 INFO L428 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:17,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:17,868 INFO L82 PathProgramCache]: Analyzing trace with hash 488739565, now seen corresponding path program 420 times [2021-03-10 22:04:17,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:17,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694176058] [2021-03-10 22:04:17,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:17,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:17,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:17,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694176058] [2021-03-10 22:04:17,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445785164] [2021-03-10 22:04:17,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:18,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:04:18,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:18,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:18,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:18,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:18,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:18,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941802292] [2021-03-10 22:04:18,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:18,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:18,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:18,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:18,156 INFO L87 Difference]: Start difference. First operand 289 states and 852 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:18,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:18,440 INFO L93 Difference]: Finished difference Result 566 states and 1582 transitions. [2021-03-10 22:04:18,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:04:18,441 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:18,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:18,441 INFO L225 Difference]: With dead ends: 566 [2021-03-10 22:04:18,441 INFO L226 Difference]: Without dead ends: 566 [2021-03-10 22:04:18,442 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 311.1ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:18,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-03-10 22:04:18,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 301. [2021-03-10 22:04:18,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.02) internal successors, (906), 300 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:18,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 906 transitions. [2021-03-10 22:04:18,446 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 906 transitions. Word has length 20 [2021-03-10 22:04:18,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:18,446 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 906 transitions. [2021-03-10 22:04:18,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:18,446 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 906 transitions. [2021-03-10 22:04:18,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:18,446 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:18,446 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:18,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3896,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:18,647 INFO L428 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:18,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:18,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1005168157, now seen corresponding path program 421 times [2021-03-10 22:04:18,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:18,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333469069] [2021-03-10 22:04:18,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:18,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333469069] [2021-03-10 22:04:18,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28212406] [2021-03-10 22:04:18,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:18,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:18,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:18,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:18,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:18,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704613756] [2021-03-10 22:04:18,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:18,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:18,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:18,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:18,907 INFO L87 Difference]: Start difference. First operand 301 states and 906 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:19,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:19,117 INFO L93 Difference]: Finished difference Result 520 states and 1480 transitions. [2021-03-10 22:04:19,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:19,117 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:19,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:19,118 INFO L225 Difference]: With dead ends: 520 [2021-03-10 22:04:19,118 INFO L226 Difference]: Without dead ends: 514 [2021-03-10 22:04:19,118 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 206.5ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:19,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-03-10 22:04:19,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 304. [2021-03-10 22:04:19,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9966996699669965) internal successors, (908), 303 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:19,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 908 transitions. [2021-03-10 22:04:19,122 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 908 transitions. Word has length 20 [2021-03-10 22:04:19,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:19,122 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 908 transitions. [2021-03-10 22:04:19,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:19,122 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 908 transitions. [2021-03-10 22:04:19,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:19,122 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:19,122 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:19,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 424 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3908 [2021-03-10 22:04:19,323 INFO L428 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:19,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:19,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1240140003, now seen corresponding path program 422 times [2021-03-10 22:04:19,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:19,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551960622] [2021-03-10 22:04:19,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:19,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551960622] [2021-03-10 22:04:19,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448066756] [2021-03-10 22:04:19,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:19,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:19,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:19,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:19,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:19,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:19,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:19,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:19,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39161400] [2021-03-10 22:04:19,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:19,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:19,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:19,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:19,608 INFO L87 Difference]: Start difference. First operand 304 states and 908 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:19,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:19,858 INFO L93 Difference]: Finished difference Result 572 states and 1622 transitions. [2021-03-10 22:04:19,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:19,859 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:19,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:19,859 INFO L225 Difference]: With dead ends: 572 [2021-03-10 22:04:19,860 INFO L226 Difference]: Without dead ends: 572 [2021-03-10 22:04:19,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 226.1ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:19,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-03-10 22:04:19,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 307. [2021-03-10 22:04:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.0163398692810457) internal successors, (923), 306 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:19,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 923 transitions. [2021-03-10 22:04:19,864 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 923 transitions. Word has length 20 [2021-03-10 22:04:19,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:19,864 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 923 transitions. [2021-03-10 22:04:19,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:19,864 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 923 transitions. [2021-03-10 22:04:19,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:19,864 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:19,864 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:20,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3917 [2021-03-10 22:04:20,065 INFO L428 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:20,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:20,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1762484893, now seen corresponding path program 423 times [2021-03-10 22:04:20,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:20,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784695091] [2021-03-10 22:04:20,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:20,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784695091] [2021-03-10 22:04:20,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910894518] [2021-03-10 22:04:20,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:20,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:04:20,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:20,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:20,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:20,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:20,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:20,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524620142] [2021-03-10 22:04:20,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:20,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:20,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:20,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:20,358 INFO L87 Difference]: Start difference. First operand 307 states and 923 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:20,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:20,609 INFO L93 Difference]: Finished difference Result 535 states and 1540 transitions. [2021-03-10 22:04:20,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:20,610 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:20,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:20,610 INFO L225 Difference]: With dead ends: 535 [2021-03-10 22:04:20,610 INFO L226 Difference]: Without dead ends: 535 [2021-03-10 22:04:20,611 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 245.8ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:20,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-03-10 22:04:20,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 304. [2021-03-10 22:04:20,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9966996699669965) internal successors, (908), 303 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:20,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 908 transitions. [2021-03-10 22:04:20,615 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 908 transitions. Word has length 20 [2021-03-10 22:04:20,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:20,615 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 908 transitions. [2021-03-10 22:04:20,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:20,615 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 908 transitions. [2021-03-10 22:04:20,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:20,615 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:20,615 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:20,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3927,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:20,816 INFO L428 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:20,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:20,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1260876531, now seen corresponding path program 424 times [2021-03-10 22:04:20,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:20,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888841890] [2021-03-10 22:04:20,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:20,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:20,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888841890] [2021-03-10 22:04:20,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313225893] [2021-03-10 22:04:20,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:20,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:20,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:20,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:20,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:21,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:21,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:21,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763968347] [2021-03-10 22:04:21,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:21,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:21,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:21,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:21,085 INFO L87 Difference]: Start difference. First operand 304 states and 908 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:21,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:21,278 INFO L93 Difference]: Finished difference Result 560 states and 1574 transitions. [2021-03-10 22:04:21,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:21,279 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:21,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:21,279 INFO L225 Difference]: With dead ends: 560 [2021-03-10 22:04:21,279 INFO L226 Difference]: Without dead ends: 554 [2021-03-10 22:04:21,280 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 215.2ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:21,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-03-10 22:04:21,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 308. [2021-03-10 22:04:21,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.003257328990228) internal successors, (922), 307 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:21,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 922 transitions. [2021-03-10 22:04:21,284 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 922 transitions. Word has length 20 [2021-03-10 22:04:21,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:21,284 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 922 transitions. [2021-03-10 22:04:21,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:21,285 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 922 transitions. [2021-03-10 22:04:21,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:21,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:21,285 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:21,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3939 [2021-03-10 22:04:21,485 INFO L428 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:21,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:21,486 INFO L82 PathProgramCache]: Analyzing trace with hash -654547395, now seen corresponding path program 425 times [2021-03-10 22:04:21,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:21,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212046045] [2021-03-10 22:04:21,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:21,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:21,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212046045] [2021-03-10 22:04:21,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3377528] [2021-03-10 22:04:21,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:21,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:04:21,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:21,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:21,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:21,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:21,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:21,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183027376] [2021-03-10 22:04:21,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:21,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:21,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:21,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:21,751 INFO L87 Difference]: Start difference. First operand 308 states and 922 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:22,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:22,029 INFO L93 Difference]: Finished difference Result 566 states and 1595 transitions. [2021-03-10 22:04:22,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:04:22,029 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:22,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:22,030 INFO L225 Difference]: With dead ends: 566 [2021-03-10 22:04:22,030 INFO L226 Difference]: Without dead ends: 566 [2021-03-10 22:04:22,030 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 277.1ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:22,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-03-10 22:04:22,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 305. [2021-03-10 22:04:22,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.0) internal successors, (912), 304 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:22,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 912 transitions. [2021-03-10 22:04:22,034 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 912 transitions. Word has length 20 [2021-03-10 22:04:22,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:22,034 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 912 transitions. [2021-03-10 22:04:22,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:22,034 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 912 transitions. [2021-03-10 22:04:22,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:22,035 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:22,035 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:22,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3949,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:22,236 INFO L428 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:22,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:22,236 INFO L82 PathProgramCache]: Analyzing trace with hash -872288627, now seen corresponding path program 426 times [2021-03-10 22:04:22,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:22,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425772494] [2021-03-10 22:04:22,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:22,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:22,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:22,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425772494] [2021-03-10 22:04:22,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111328829] [2021-03-10 22:04:22,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:22,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:04:22,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:22,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:22,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:22,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:22,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:22,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868963358] [2021-03-10 22:04:22,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:22,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:22,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:22,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:22,539 INFO L87 Difference]: Start difference. First operand 305 states and 912 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:22,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:22,721 INFO L93 Difference]: Finished difference Result 517 states and 1509 transitions. [2021-03-10 22:04:22,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:22,722 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:22,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:22,722 INFO L225 Difference]: With dead ends: 517 [2021-03-10 22:04:22,722 INFO L226 Difference]: Without dead ends: 517 [2021-03-10 22:04:22,722 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:22,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-03-10 22:04:22,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 311. [2021-03-10 22:04:22,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.029032258064516) internal successors, (939), 310 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:22,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 939 transitions. [2021-03-10 22:04:22,726 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 939 transitions. Word has length 20 [2021-03-10 22:04:22,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:22,726 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 939 transitions. [2021-03-10 22:04:22,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:22,726 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 939 transitions. [2021-03-10 22:04:22,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:22,727 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:22,727 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:22,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3959 [2021-03-10 22:04:22,927 INFO L428 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:22,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:22,927 INFO L82 PathProgramCache]: Analyzing trace with hash 420053773, now seen corresponding path program 427 times [2021-03-10 22:04:22,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:22,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537579418] [2021-03-10 22:04:22,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:22,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537579418] [2021-03-10 22:04:22,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186644763] [2021-03-10 22:04:22,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:23,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:23,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:23,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:23,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:23,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791452916] [2021-03-10 22:04:23,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:23,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:23,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:23,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:23,216 INFO L87 Difference]: Start difference. First operand 311 states and 939 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:23,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:23,396 INFO L93 Difference]: Finished difference Result 505 states and 1476 transitions. [2021-03-10 22:04:23,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:23,396 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:23,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:23,397 INFO L225 Difference]: With dead ends: 505 [2021-03-10 22:04:23,397 INFO L226 Difference]: Without dead ends: 505 [2021-03-10 22:04:23,397 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 225.2ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:23,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-03-10 22:04:23,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 308. [2021-03-10 22:04:23,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.009771986970684) internal successors, (924), 307 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:23,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 924 transitions. [2021-03-10 22:04:23,401 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 924 transitions. Word has length 20 [2021-03-10 22:04:23,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:23,401 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 924 transitions. [2021-03-10 22:04:23,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:23,401 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 924 transitions. [2021-03-10 22:04:23,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:23,401 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:23,401 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:23,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3970,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:23,602 INFO L428 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:23,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:23,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1475811263, now seen corresponding path program 428 times [2021-03-10 22:04:23,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:23,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594213904] [2021-03-10 22:04:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:23,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594213904] [2021-03-10 22:04:23,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764737668] [2021-03-10 22:04:23,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:23,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:23,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:23,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:23,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:23,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:23,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:23,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131042784] [2021-03-10 22:04:23,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:23,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:23,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:23,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:23,898 INFO L87 Difference]: Start difference. First operand 308 states and 924 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:24,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:24,078 INFO L93 Difference]: Finished difference Result 460 states and 1354 transitions. [2021-03-10 22:04:24,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:24,078 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:24,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:24,079 INFO L225 Difference]: With dead ends: 460 [2021-03-10 22:04:24,079 INFO L226 Difference]: Without dead ends: 460 [2021-03-10 22:04:24,079 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 218.6ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:24,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-03-10 22:04:24,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 305. [2021-03-10 22:04:24,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.0) internal successors, (912), 304 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:24,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 912 transitions. [2021-03-10 22:04:24,082 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 912 transitions. Word has length 20 [2021-03-10 22:04:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:24,082 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 912 transitions. [2021-03-10 22:04:24,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:24,082 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 912 transitions. [2021-03-10 22:04:24,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:24,083 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:24,083 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:24,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,431 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:24,283 INFO L428 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:24,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:24,283 INFO L82 PathProgramCache]: Analyzing trace with hash -2119009277, now seen corresponding path program 429 times [2021-03-10 22:04:24,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:24,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132964534] [2021-03-10 22:04:24,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:24,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:24,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132964534] [2021-03-10 22:04:24,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078727788] [2021-03-10 22:04:24,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:24,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:04:24,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:24,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:04:24,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:24,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:24,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:24,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:04:24,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:24,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:24,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:24,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:04:24,520 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:24,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:04:24,522 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:24,551 INFO L628 ElimStorePlain]: treesize reduction 24, result has 53.8 percent of original size [2021-03-10 22:04:24,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:04:24,552 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:95, output treesize:28 [2021-03-10 22:04:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:24,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:24,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:04:24,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393973815] [2021-03-10 22:04:24,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:04:24,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:24,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:04:24,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:04:24,618 INFO L87 Difference]: Start difference. First operand 305 states and 912 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:24,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:24,961 INFO L93 Difference]: Finished difference Result 499 states and 1433 transitions. [2021-03-10 22:04:24,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:24,962 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:24,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:24,962 INFO L225 Difference]: With dead ends: 499 [2021-03-10 22:04:24,962 INFO L226 Difference]: Without dead ends: 493 [2021-03-10 22:04:24,962 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 331.4ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:04:24,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-03-10 22:04:24,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 313. [2021-03-10 22:04:24,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.0064102564102564) internal successors, (938), 312 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 938 transitions. [2021-03-10 22:04:24,966 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 938 transitions. Word has length 20 [2021-03-10 22:04:24,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:24,966 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 938 transitions. [2021-03-10 22:04:24,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:24,966 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 938 transitions. [2021-03-10 22:04:24,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:24,967 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:24,967 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:25,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3988,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:25,167 INFO L428 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:25,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:25,168 INFO L82 PathProgramCache]: Analyzing trace with hash 260534093, now seen corresponding path program 430 times [2021-03-10 22:04:25,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:25,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182673490] [2021-03-10 22:04:25,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:25,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182673490] [2021-03-10 22:04:25,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406210370] [2021-03-10 22:04:25,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:25,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:25,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:25,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:25,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:25,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:25,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:25,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510828689] [2021-03-10 22:04:25,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:25,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:25,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:25,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:25,456 INFO L87 Difference]: Start difference. First operand 313 states and 938 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:25,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:25,671 INFO L93 Difference]: Finished difference Result 505 states and 1454 transitions. [2021-03-10 22:04:25,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:04:25,672 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:25,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:25,672 INFO L225 Difference]: With dead ends: 505 [2021-03-10 22:04:25,673 INFO L226 Difference]: Without dead ends: 505 [2021-03-10 22:04:25,673 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:25,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-03-10 22:04:25,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 309. [2021-03-10 22:04:25,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0) internal successors, (924), 308 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 924 transitions. [2021-03-10 22:04:25,676 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 924 transitions. Word has length 20 [2021-03-10 22:04:25,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:25,677 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 924 transitions. [2021-03-10 22:04:25,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:25,677 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 924 transitions. [2021-03-10 22:04:25,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:25,677 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:25,677 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:25,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4000 [2021-03-10 22:04:25,877 INFO L428 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:25,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:25,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1300769891, now seen corresponding path program 431 times [2021-03-10 22:04:25,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:25,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317185525] [2021-03-10 22:04:25,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:25,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317185525] [2021-03-10 22:04:25,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776112224] [2021-03-10 22:04:25,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:26,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:04:26,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:26,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:04:26,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:26,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:26,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:04:26,117 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:04:26,119 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,138 INFO L628 ElimStorePlain]: treesize reduction 12, result has 62.5 percent of original size [2021-03-10 22:04:26,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:04:26,139 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:63, output treesize:20 [2021-03-10 22:04:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:26,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:26,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:04:26,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612314084] [2021-03-10 22:04:26,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:04:26,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:26,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:04:26,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:04:26,183 INFO L87 Difference]: Start difference. First operand 309 states and 924 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:26,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:26,484 INFO L93 Difference]: Finished difference Result 480 states and 1404 transitions. [2021-03-10 22:04:26,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:26,484 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:26,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:26,485 INFO L225 Difference]: With dead ends: 480 [2021-03-10 22:04:26,485 INFO L226 Difference]: Without dead ends: 480 [2021-03-10 22:04:26,485 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 302.6ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:04:26,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-03-10 22:04:26,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 306. [2021-03-10 22:04:26,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.0) internal successors, (915), 305 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 915 transitions. [2021-03-10 22:04:26,488 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 915 transitions. Word has length 20 [2021-03-10 22:04:26,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:26,488 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 915 transitions. [2021-03-10 22:04:26,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:26,488 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 915 transitions. [2021-03-10 22:04:26,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:26,489 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:26,489 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:26,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4010,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:26,689 INFO L428 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:26,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:26,689 INFO L82 PathProgramCache]: Analyzing trace with hash -2145222335, now seen corresponding path program 432 times [2021-03-10 22:04:26,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:26,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15182345] [2021-03-10 22:04:26,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:26,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:26,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15182345] [2021-03-10 22:04:26,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413423542] [2021-03-10 22:04:26,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:26,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:04:26,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:26,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:26,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:26,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:26,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:26,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460513796] [2021-03-10 22:04:26,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:26,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:26,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:26,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:26,958 INFO L87 Difference]: Start difference. First operand 306 states and 915 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:27,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:27,135 INFO L93 Difference]: Finished difference Result 504 states and 1465 transitions. [2021-03-10 22:04:27,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:27,135 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:27,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:27,136 INFO L225 Difference]: With dead ends: 504 [2021-03-10 22:04:27,136 INFO L226 Difference]: Without dead ends: 504 [2021-03-10 22:04:27,136 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 181.7ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:27,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-03-10 22:04:27,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 309. [2021-03-10 22:04:27,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0) internal successors, (924), 308 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:27,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 924 transitions. [2021-03-10 22:04:27,140 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 924 transitions. Word has length 20 [2021-03-10 22:04:27,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:27,140 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 924 transitions. [2021-03-10 22:04:27,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:27,140 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 924 transitions. [2021-03-10 22:04:27,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:27,140 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:27,140 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:27,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4016,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:27,341 INFO L428 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:27,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:27,341 INFO L82 PathProgramCache]: Analyzing trace with hash -852879935, now seen corresponding path program 433 times [2021-03-10 22:04:27,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:27,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122169624] [2021-03-10 22:04:27,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:27,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:27,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122169624] [2021-03-10 22:04:27,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148580020] [2021-03-10 22:04:27,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:27,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:27,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:27,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:27,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:27,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:27,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:27,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214481885] [2021-03-10 22:04:27,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:27,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:27,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:27,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:27,603 INFO L87 Difference]: Start difference. First operand 309 states and 924 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:27,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:27,770 INFO L93 Difference]: Finished difference Result 506 states and 1469 transitions. [2021-03-10 22:04:27,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:27,770 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:27,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:27,771 INFO L225 Difference]: With dead ends: 506 [2021-03-10 22:04:27,771 INFO L226 Difference]: Without dead ends: 506 [2021-03-10 22:04:27,771 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 185.8ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:27,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-03-10 22:04:27,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 306. [2021-03-10 22:04:27,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.980327868852459) internal successors, (909), 305 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:27,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 909 transitions. [2021-03-10 22:04:27,775 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 909 transitions. Word has length 20 [2021-03-10 22:04:27,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:27,775 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 909 transitions. [2021-03-10 22:04:27,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:27,775 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 909 transitions. [2021-03-10 22:04:27,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:27,775 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:27,775 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:27,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4027,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:27,976 INFO L428 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:27,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:27,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1546222325, now seen corresponding path program 434 times [2021-03-10 22:04:27,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:27,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355818232] [2021-03-10 22:04:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:28,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355818232] [2021-03-10 22:04:28,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869434332] [2021-03-10 22:04:28,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:28,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:28,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:28,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:28,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:28,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:28,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:28,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316102435] [2021-03-10 22:04:28,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:28,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:28,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:28,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:28,255 INFO L87 Difference]: Start difference. First operand 306 states and 909 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:28,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:28,454 INFO L93 Difference]: Finished difference Result 451 states and 1318 transitions. [2021-03-10 22:04:28,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:28,454 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:28,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:28,455 INFO L225 Difference]: With dead ends: 451 [2021-03-10 22:04:28,455 INFO L226 Difference]: Without dead ends: 451 [2021-03-10 22:04:28,455 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 209.7ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:28,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-03-10 22:04:28,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 293. [2021-03-10 22:04:28,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.9726027397260273) internal successors, (868), 292 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:28,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 868 transitions. [2021-03-10 22:04:28,458 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 868 transitions. Word has length 20 [2021-03-10 22:04:28,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:28,458 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 868 transitions. [2021-03-10 22:04:28,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:28,458 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 868 transitions. [2021-03-10 22:04:28,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:28,459 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:28,459 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:28,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4038,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:28,659 INFO L428 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:28,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:28,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1487908445, now seen corresponding path program 435 times [2021-03-10 22:04:28,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:28,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903056827] [2021-03-10 22:04:28,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:28,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903056827] [2021-03-10 22:04:28,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727437159] [2021-03-10 22:04:28,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:28,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:04:28,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:28,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:28,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:28,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:28,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:04:28,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41502868] [2021-03-10 22:04:28,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:04:28,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:28,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:04:28,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:28,906 INFO L87 Difference]: Start difference. First operand 293 states and 868 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:29,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:29,091 INFO L93 Difference]: Finished difference Result 474 states and 1360 transitions. [2021-03-10 22:04:29,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:29,091 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:29,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:29,092 INFO L225 Difference]: With dead ends: 474 [2021-03-10 22:04:29,092 INFO L226 Difference]: Without dead ends: 474 [2021-03-10 22:04:29,092 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 186.6ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:29,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-03-10 22:04:29,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 290. [2021-03-10 22:04:29,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.961937716262976) internal successors, (856), 289 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:29,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2021-03-10 22:04:29,096 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2021-03-10 22:04:29,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:29,096 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2021-03-10 22:04:29,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:29,096 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2021-03-10 22:04:29,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:29,096 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:29,096 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:29,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4046 [2021-03-10 22:04:29,297 INFO L428 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:29,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:29,297 INFO L82 PathProgramCache]: Analyzing trace with hash 266557457, now seen corresponding path program 436 times [2021-03-10 22:04:29,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:29,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556577552] [2021-03-10 22:04:29,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:29,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556577552] [2021-03-10 22:04:29,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238127612] [2021-03-10 22:04:29,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:29,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:29,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:29,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:29,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:29,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:29,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:04:29,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782373521] [2021-03-10 22:04:29,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:04:29,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:29,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:04:29,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:29,552 INFO L87 Difference]: Start difference. First operand 290 states and 856 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:29,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:29,757 INFO L93 Difference]: Finished difference Result 539 states and 1504 transitions. [2021-03-10 22:04:29,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:29,757 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:29,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:29,758 INFO L225 Difference]: With dead ends: 539 [2021-03-10 22:04:29,758 INFO L226 Difference]: Without dead ends: 533 [2021-03-10 22:04:29,758 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 225.8ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:29,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-03-10 22:04:29,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 308. [2021-03-10 22:04:29,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.954397394136808) internal successors, (907), 307 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:29,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 907 transitions. [2021-03-10 22:04:29,762 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 907 transitions. Word has length 20 [2021-03-10 22:04:29,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:29,762 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 907 transitions. [2021-03-10 22:04:29,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:29,762 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 907 transitions. [2021-03-10 22:04:29,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:29,762 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:29,762 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:29,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4051,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:29,963 INFO L428 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:29,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:29,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1648866469, now seen corresponding path program 437 times [2021-03-10 22:04:29,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:29,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040847147] [2021-03-10 22:04:29,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:30,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040847147] [2021-03-10 22:04:30,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467257445] [2021-03-10 22:04:30,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:30,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:04:30,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:30,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:04:30,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:30,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:04:30,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:30,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:30,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:30,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:04:30,196 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:30,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:30,199 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:30,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:04:30,202 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:30,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:04:30,205 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:30,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:04:30,208 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:30,240 INFO L628 ElimStorePlain]: treesize reduction 47, result has 37.3 percent of original size [2021-03-10 22:04:30,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:04:30,241 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:142, output treesize:28 [2021-03-10 22:04:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:30,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:30,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:04:30,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465511596] [2021-03-10 22:04:30,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:04:30,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:30,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:04:30,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:04:30,308 INFO L87 Difference]: Start difference. First operand 308 states and 907 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:30,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:30,670 INFO L93 Difference]: Finished difference Result 545 states and 1525 transitions. [2021-03-10 22:04:30,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:04:30,670 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:30,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:30,671 INFO L225 Difference]: With dead ends: 545 [2021-03-10 22:04:30,671 INFO L226 Difference]: Without dead ends: 545 [2021-03-10 22:04:30,671 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 364.2ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:04:30,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-03-10 22:04:30,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 306. [2021-03-10 22:04:30,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.957377049180328) internal successors, (902), 305 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:30,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 902 transitions. [2021-03-10 22:04:30,675 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 902 transitions. Word has length 20 [2021-03-10 22:04:30,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:30,675 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 902 transitions. [2021-03-10 22:04:30,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:30,675 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 902 transitions. [2021-03-10 22:04:30,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:30,675 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:30,675 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:30,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4062,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:30,876 INFO L428 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:30,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:30,876 INFO L82 PathProgramCache]: Analyzing trace with hash -608630671, now seen corresponding path program 438 times [2021-03-10 22:04:30,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:30,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424278754] [2021-03-10 22:04:30,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:30,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424278754] [2021-03-10 22:04:30,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690852400] [2021-03-10 22:04:30,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:31,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:04:31,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:31,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:31,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:31,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:31,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:31,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:04:31,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103452283] [2021-03-10 22:04:31,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:04:31,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:31,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:04:31,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:31,132 INFO L87 Difference]: Start difference. First operand 306 states and 902 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:31,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:31,346 INFO L93 Difference]: Finished difference Result 528 states and 1497 transitions. [2021-03-10 22:04:31,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:31,346 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:31,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:31,347 INFO L225 Difference]: With dead ends: 528 [2021-03-10 22:04:31,347 INFO L226 Difference]: Without dead ends: 528 [2021-03-10 22:04:31,347 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 236.9ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:31,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-03-10 22:04:31,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 304. [2021-03-10 22:04:31,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.9603960396039604) internal successors, (897), 303 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:31,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 897 transitions. [2021-03-10 22:04:31,351 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 897 transitions. Word has length 20 [2021-03-10 22:04:31,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:31,351 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 897 transitions. [2021-03-10 22:04:31,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:31,351 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 897 transitions. [2021-03-10 22:04:31,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:31,351 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:31,351 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:31,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4072 [2021-03-10 22:04:31,566 INFO L428 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:31,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:31,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1151422269, now seen corresponding path program 439 times [2021-03-10 22:04:31,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:31,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194705381] [2021-03-10 22:04:31,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:31,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194705381] [2021-03-10 22:04:31,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512311827] [2021-03-10 22:04:31,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:31,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:31,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:31,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:31,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:04:31,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297074906] [2021-03-10 22:04:31,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:04:31,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:31,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:04:31,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:04:31,799 INFO L87 Difference]: Start difference. First operand 304 states and 897 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:31,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:31,983 INFO L93 Difference]: Finished difference Result 553 states and 1551 transitions. [2021-03-10 22:04:31,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:31,983 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:31,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:31,984 INFO L225 Difference]: With dead ends: 553 [2021-03-10 22:04:31,984 INFO L226 Difference]: Without dead ends: 553 [2021-03-10 22:04:31,984 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 194.7ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:31,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-03-10 22:04:31,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 289. [2021-03-10 22:04:31,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.9583333333333335) internal successors, (852), 288 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:31,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 852 transitions. [2021-03-10 22:04:31,988 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 852 transitions. Word has length 20 [2021-03-10 22:04:31,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:31,988 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 852 transitions. [2021-03-10 22:04:31,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:31,988 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 852 transitions. [2021-03-10 22:04:31,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:31,988 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:31,988 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:32,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4077,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:32,189 INFO L428 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:32,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:32,189 INFO L82 PathProgramCache]: Analyzing trace with hash 349916067, now seen corresponding path program 440 times [2021-03-10 22:04:32,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:32,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061299109] [2021-03-10 22:04:32,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:32,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:32,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061299109] [2021-03-10 22:04:32,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896204636] [2021-03-10 22:04:32,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:32,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:32,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:32,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:32,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:32,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:32,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:04:32,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050110434] [2021-03-10 22:04:32,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:04:32,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:32,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:04:32,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:04:32,415 INFO L87 Difference]: Start difference. First operand 289 states and 852 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:32,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:32,624 INFO L93 Difference]: Finished difference Result 328 states and 952 transitions. [2021-03-10 22:04:32,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:32,624 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:32,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:32,625 INFO L225 Difference]: With dead ends: 328 [2021-03-10 22:04:32,625 INFO L226 Difference]: Without dead ends: 316 [2021-03-10 22:04:32,625 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 234.3ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:04:32,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-03-10 22:04:32,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 295. [2021-03-10 22:04:32,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9489795918367347) internal successors, (867), 294 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:32,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 867 transitions. [2021-03-10 22:04:32,628 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 867 transitions. Word has length 20 [2021-03-10 22:04:32,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:32,628 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 867 transitions. [2021-03-10 22:04:32,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:32,628 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 867 transitions. [2021-03-10 22:04:32,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:32,629 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:32,629 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:32,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4082 [2021-03-10 22:04:32,829 INFO L428 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:32,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:32,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1101316505, now seen corresponding path program 441 times [2021-03-10 22:04:32,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:32,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224915017] [2021-03-10 22:04:32,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:32,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:32,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224915017] [2021-03-10 22:04:32,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117116202] [2021-03-10 22:04:32,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:32,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:04:32,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:32,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:32,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:33,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:33,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:33,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:04:33,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770564827] [2021-03-10 22:04:33,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:04:33,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:33,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:04:33,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:04:33,074 INFO L87 Difference]: Start difference. First operand 295 states and 867 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:33,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:33,271 INFO L93 Difference]: Finished difference Result 353 states and 1004 transitions. [2021-03-10 22:04:33,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:33,271 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:33,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:33,272 INFO L225 Difference]: With dead ends: 353 [2021-03-10 22:04:33,272 INFO L226 Difference]: Without dead ends: 347 [2021-03-10 22:04:33,272 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:33,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-03-10 22:04:33,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 305. [2021-03-10 22:04:33,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9407894736842106) internal successors, (894), 304 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:33,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 894 transitions. [2021-03-10 22:04:33,275 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 894 transitions. Word has length 20 [2021-03-10 22:04:33,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:33,275 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 894 transitions. [2021-03-10 22:04:33,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:33,275 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 894 transitions. [2021-03-10 22:04:33,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:33,275 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:33,275 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:33,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4090,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:33,476 INFO L428 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:33,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:33,476 INFO L82 PathProgramCache]: Analyzing trace with hash -814107421, now seen corresponding path program 442 times [2021-03-10 22:04:33,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:33,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125146901] [2021-03-10 22:04:33,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:33,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125146901] [2021-03-10 22:04:33,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016830189] [2021-03-10 22:04:33,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:33,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:33,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:33,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:33,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:33,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:33,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:04:33,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916501122] [2021-03-10 22:04:33,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:04:33,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:33,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:04:33,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:04:33,703 INFO L87 Difference]: Start difference. First operand 305 states and 894 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:33,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:33,881 INFO L93 Difference]: Finished difference Result 324 states and 950 transitions. [2021-03-10 22:04:33,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:33,882 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:33,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:33,882 INFO L225 Difference]: With dead ends: 324 [2021-03-10 22:04:33,882 INFO L226 Difference]: Without dead ends: 324 [2021-03-10 22:04:33,882 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:04:33,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-03-10 22:04:33,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 293. [2021-03-10 22:04:33,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.952054794520548) internal successors, (862), 292 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:33,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 862 transitions. [2021-03-10 22:04:33,885 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 862 transitions. Word has length 20 [2021-03-10 22:04:33,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:33,885 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 862 transitions. [2021-03-10 22:04:33,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:33,885 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 862 transitions. [2021-03-10 22:04:33,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:33,885 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:33,885 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:34,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4097 [2021-03-10 22:04:34,086 INFO L428 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:34,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:34,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1011112125, now seen corresponding path program 443 times [2021-03-10 22:04:34,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:34,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824588597] [2021-03-10 22:04:34,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:34,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824588597] [2021-03-10 22:04:34,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971781615] [2021-03-10 22:04:34,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:34,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:04:34,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:34,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:04:34,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:34,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:04:34,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:34,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:04:34,288 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:34,292 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:04:34,295 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:04:34,298 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:04:34,301 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,333 INFO L628 ElimStorePlain]: treesize reduction 47, result has 37.3 percent of original size [2021-03-10 22:04:34,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:04:34,334 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:142, output treesize:28 [2021-03-10 22:04:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:34,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:34,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-03-10 22:04:34,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692725064] [2021-03-10 22:04:34,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:34,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:34,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:34,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:34,395 INFO L87 Difference]: Start difference. First operand 293 states and 862 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:34,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:34,641 INFO L93 Difference]: Finished difference Result 359 states and 1019 transitions. [2021-03-10 22:04:34,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:34,641 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:34,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:34,642 INFO L225 Difference]: With dead ends: 359 [2021-03-10 22:04:34,642 INFO L226 Difference]: Without dead ends: 353 [2021-03-10 22:04:34,642 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 243.4ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:34,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-03-10 22:04:34,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 307. [2021-03-10 22:04:34,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9444444444444446) internal successors, (901), 306 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 901 transitions. [2021-03-10 22:04:34,645 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 901 transitions. Word has length 20 [2021-03-10 22:04:34,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:34,645 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 901 transitions. [2021-03-10 22:04:34,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:34,645 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 901 transitions. [2021-03-10 22:04:34,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:34,646 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:34,646 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:34,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4102,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:34,846 INFO L428 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:34,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:34,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1368431245, now seen corresponding path program 444 times [2021-03-10 22:04:34,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:34,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007707886] [2021-03-10 22:04:34,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:34,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007707886] [2021-03-10 22:04:34,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926713651] [2021-03-10 22:04:34,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:34,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:04:34,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:34,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:34,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:35,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:35,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:04:35,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784664058] [2021-03-10 22:04:35,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:04:35,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:35,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:04:35,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:04:35,058 INFO L87 Difference]: Start difference. First operand 307 states and 901 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:35,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:35,216 INFO L93 Difference]: Finished difference Result 359 states and 1025 transitions. [2021-03-10 22:04:35,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:04:35,217 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:35,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:35,217 INFO L225 Difference]: With dead ends: 359 [2021-03-10 22:04:35,217 INFO L226 Difference]: Without dead ends: 359 [2021-03-10 22:04:35,217 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 156.4ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:04:35,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-03-10 22:04:35,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 305. [2021-03-10 22:04:35,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9473684210526314) internal successors, (896), 304 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:35,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 896 transitions. [2021-03-10 22:04:35,220 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 896 transitions. Word has length 20 [2021-03-10 22:04:35,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:35,221 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 896 transitions. [2021-03-10 22:04:35,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:35,221 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 896 transitions. [2021-03-10 22:04:35,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:35,221 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:35,221 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:35,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4109 [2021-03-10 22:04:35,421 INFO L428 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:35,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:35,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1886300253, now seen corresponding path program 445 times [2021-03-10 22:04:35,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:35,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105366593] [2021-03-10 22:04:35,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:35,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105366593] [2021-03-10 22:04:35,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029404164] [2021-03-10 22:04:35,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:35,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:35,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:35,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:35,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:04:35,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922345773] [2021-03-10 22:04:35,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:04:35,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:35,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:04:35,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:04:35,628 INFO L87 Difference]: Start difference. First operand 305 states and 896 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:35,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:35,763 INFO L93 Difference]: Finished difference Result 334 states and 975 transitions. [2021-03-10 22:04:35,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:35,763 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:35,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:35,764 INFO L225 Difference]: With dead ends: 334 [2021-03-10 22:04:35,764 INFO L226 Difference]: Without dead ends: 334 [2021-03-10 22:04:35,764 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:35,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-03-10 22:04:35,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 291. [2021-03-10 22:04:35,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9551724137931035) internal successors, (857), 290 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:35,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 857 transitions. [2021-03-10 22:04:35,767 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 857 transitions. Word has length 20 [2021-03-10 22:04:35,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:35,767 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 857 transitions. [2021-03-10 22:04:35,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:35,767 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 857 transitions. [2021-03-10 22:04:35,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:35,767 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:35,767 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:35,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4113,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:35,968 INFO L428 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:35,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:35,968 INFO L82 PathProgramCache]: Analyzing trace with hash 2010921463, now seen corresponding path program 446 times [2021-03-10 22:04:35,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:35,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457154102] [2021-03-10 22:04:35,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:36,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457154102] [2021-03-10 22:04:36,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436342705] [2021-03-10 22:04:36,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:36,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:36,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:36,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:36,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:36,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:36,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:04:36,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505883934] [2021-03-10 22:04:36,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:04:36,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:36,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:04:36,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:04:36,180 INFO L87 Difference]: Start difference. First operand 291 states and 857 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:36,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:36,343 INFO L93 Difference]: Finished difference Result 418 states and 1160 transitions. [2021-03-10 22:04:36,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:36,343 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:36,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:36,344 INFO L225 Difference]: With dead ends: 418 [2021-03-10 22:04:36,344 INFO L226 Difference]: Without dead ends: 412 [2021-03-10 22:04:36,344 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:04:36,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-03-10 22:04:36,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 309. [2021-03-10 22:04:36,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.948051948051948) internal successors, (908), 308 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:36,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 908 transitions. [2021-03-10 22:04:36,347 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 908 transitions. Word has length 20 [2021-03-10 22:04:36,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:36,347 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 908 transitions. [2021-03-10 22:04:36,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:36,347 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 908 transitions. [2021-03-10 22:04:36,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:36,348 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:36,348 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:36,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4115,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:36,549 INFO L428 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:36,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:36,549 INFO L82 PathProgramCache]: Analyzing trace with hash 95497537, now seen corresponding path program 447 times [2021-03-10 22:04:36,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:36,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379763599] [2021-03-10 22:04:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:36,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:36,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379763599] [2021-03-10 22:04:36,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890688201] [2021-03-10 22:04:36,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:36,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:04:36,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:36,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:04:36,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:36,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:36,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:36,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:04:36,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:36,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:36,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:36,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:04:36,757 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:36,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:04:36,760 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:36,789 INFO L628 ElimStorePlain]: treesize reduction 24, result has 53.8 percent of original size [2021-03-10 22:04:36,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:04:36,790 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:95, output treesize:28 [2021-03-10 22:04:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:36,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:36,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:04:36,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743170219] [2021-03-10 22:04:36,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:36,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:36,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:36,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:36,855 INFO L87 Difference]: Start difference. First operand 309 states and 908 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:37,161 INFO L93 Difference]: Finished difference Result 418 states and 1166 transitions. [2021-03-10 22:04:37,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:04:37,162 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:37,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:37,162 INFO L225 Difference]: With dead ends: 418 [2021-03-10 22:04:37,162 INFO L226 Difference]: Without dead ends: 418 [2021-03-10 22:04:37,162 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 284.8ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:04:37,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-03-10 22:04:37,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 307. [2021-03-10 22:04:37,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.950980392156863) internal successors, (903), 306 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:37,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 903 transitions. [2021-03-10 22:04:37,166 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 903 transitions. Word has length 20 [2021-03-10 22:04:37,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:37,166 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 903 transitions. [2021-03-10 22:04:37,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:37,166 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 903 transitions. [2021-03-10 22:04:37,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:37,166 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:37,166 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:37,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4119,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:37,367 INFO L428 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:37,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:37,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1135733335, now seen corresponding path program 448 times [2021-03-10 22:04:37,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:37,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848799343] [2021-03-10 22:04:37,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:37,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848799343] [2021-03-10 22:04:37,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81553458] [2021-03-10 22:04:37,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:37,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:37,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:37,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:37,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:37,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:37,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:04:37,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624821203] [2021-03-10 22:04:37,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:04:37,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:37,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:04:37,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:04:37,576 INFO L87 Difference]: Start difference. First operand 307 states and 903 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:37,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:37,726 INFO L93 Difference]: Finished difference Result 407 states and 1153 transitions. [2021-03-10 22:04:37,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:37,727 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:37,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:37,727 INFO L225 Difference]: With dead ends: 407 [2021-03-10 22:04:37,727 INFO L226 Difference]: Without dead ends: 407 [2021-03-10 22:04:37,727 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:37,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-03-10 22:04:37,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 305. [2021-03-10 22:04:37,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.9539473684210527) internal successors, (898), 304 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:37,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 898 transitions. [2021-03-10 22:04:37,731 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 898 transitions. Word has length 20 [2021-03-10 22:04:37,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:37,731 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 898 transitions. [2021-03-10 22:04:37,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:37,731 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 898 transitions. [2021-03-10 22:04:37,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:37,731 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:37,731 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:37,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4128,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:37,931 INFO L428 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:37,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:37,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1399181021, now seen corresponding path program 449 times [2021-03-10 22:04:37,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:37,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924733644] [2021-03-10 22:04:37,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:37,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:37,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924733644] [2021-03-10 22:04:37,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563500183] [2021-03-10 22:04:37,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:38,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:04:38,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:38,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:04:38,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:38,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:38,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:38,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:04:38,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:38,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:04:38,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:38,153 INFO L628 ElimStorePlain]: treesize reduction 12, result has 62.5 percent of original size [2021-03-10 22:04:38,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:04:38,154 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:63, output treesize:20 [2021-03-10 22:04:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:38,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:38,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:04:38,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782476539] [2021-03-10 22:04:38,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:38,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:38,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:38,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:38,197 INFO L87 Difference]: Start difference. First operand 305 states and 898 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:38,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:38,379 INFO L93 Difference]: Finished difference Result 397 states and 1126 transitions. [2021-03-10 22:04:38,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:38,379 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:38,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:38,380 INFO L225 Difference]: With dead ends: 397 [2021-03-10 22:04:38,380 INFO L226 Difference]: Without dead ends: 397 [2021-03-10 22:04:38,380 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 168.7ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:38,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-03-10 22:04:38,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 291. [2021-03-10 22:04:38,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9551724137931035) internal successors, (857), 290 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:38,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 857 transitions. [2021-03-10 22:04:38,383 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 857 transitions. Word has length 20 [2021-03-10 22:04:38,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:38,383 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 857 transitions. [2021-03-10 22:04:38,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:38,383 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 857 transitions. [2021-03-10 22:04:38,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:38,384 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:38,384 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:38,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4131 [2021-03-10 22:04:38,584 INFO L428 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:38,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:38,584 INFO L82 PathProgramCache]: Analyzing trace with hash -817863631, now seen corresponding path program 450 times [2021-03-10 22:04:38,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:38,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109475554] [2021-03-10 22:04:38,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:38,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109475554] [2021-03-10 22:04:38,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172271619] [2021-03-10 22:04:38,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:38,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:04:38,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:38,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:38,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:38,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:38,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:04:38,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58146000] [2021-03-10 22:04:38,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:38,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:38,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:38,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:38,904 INFO L87 Difference]: Start difference. First operand 291 states and 857 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:39,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:39,359 INFO L93 Difference]: Finished difference Result 592 states and 1701 transitions. [2021-03-10 22:04:39,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:39,359 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:39,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:39,360 INFO L225 Difference]: With dead ends: 592 [2021-03-10 22:04:39,360 INFO L226 Difference]: Without dead ends: 592 [2021-03-10 22:04:39,360 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 469.2ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:39,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-03-10 22:04:39,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 303. [2021-03-10 22:04:39,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9900662251655628) internal successors, (903), 302 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:39,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2021-03-10 22:04:39,364 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2021-03-10 22:04:39,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:39,364 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2021-03-10 22:04:39,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:39,364 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2021-03-10 22:04:39,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:39,364 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:39,364 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:39,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4137,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:39,565 INFO L428 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:39,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:39,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1983195943, now seen corresponding path program 451 times [2021-03-10 22:04:39,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:39,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643226225] [2021-03-10 22:04:39,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:39,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643226225] [2021-03-10 22:04:39,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740555991] [2021-03-10 22:04:39,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:39,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:39,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:39,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:39,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:04:39,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172678668] [2021-03-10 22:04:39,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:39,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:39,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:39,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:39,888 INFO L87 Difference]: Start difference. First operand 303 states and 903 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:40,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:40,425 INFO L93 Difference]: Finished difference Result 598 states and 1708 transitions. [2021-03-10 22:04:40,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:04:40,425 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:40,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:40,426 INFO L225 Difference]: With dead ends: 598 [2021-03-10 22:04:40,426 INFO L226 Difference]: Without dead ends: 592 [2021-03-10 22:04:40,426 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 554.4ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:04:40,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-03-10 22:04:40,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 300. [2021-03-10 22:04:40,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.983277591973244) internal successors, (892), 299 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:40,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 892 transitions. [2021-03-10 22:04:40,430 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 892 transitions. Word has length 20 [2021-03-10 22:04:40,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:40,430 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 892 transitions. [2021-03-10 22:04:40,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:40,430 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 892 transitions. [2021-03-10 22:04:40,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:40,431 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:40,431 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:40,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4144 [2021-03-10 22:04:40,631 INFO L428 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:40,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:40,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1773915775, now seen corresponding path program 452 times [2021-03-10 22:04:40,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:40,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868956733] [2021-03-10 22:04:40,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:40,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868956733] [2021-03-10 22:04:40,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918143519] [2021-03-10 22:04:40,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:40,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:40,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:40,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:40,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:40,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:40,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:04:40,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219600829] [2021-03-10 22:04:40,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:40,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:40,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:40,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:40,951 INFO L87 Difference]: Start difference. First operand 300 states and 892 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:41,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:41,362 INFO L93 Difference]: Finished difference Result 562 states and 1626 transitions. [2021-03-10 22:04:41,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:41,362 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:41,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:41,363 INFO L225 Difference]: With dead ends: 562 [2021-03-10 22:04:41,363 INFO L226 Difference]: Without dead ends: 550 [2021-03-10 22:04:41,363 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 462.1ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:41,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-03-10 22:04:41,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 297. [2021-03-10 22:04:41,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9763513513513513) internal successors, (881), 296 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:41,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 881 transitions. [2021-03-10 22:04:41,367 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 881 transitions. Word has length 20 [2021-03-10 22:04:41,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:41,367 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 881 transitions. [2021-03-10 22:04:41,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:41,367 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 881 transitions. [2021-03-10 22:04:41,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:41,367 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:41,367 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:41,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4151 [2021-03-10 22:04:41,568 INFO L428 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:41,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:41,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1186170453, now seen corresponding path program 453 times [2021-03-10 22:04:41,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:41,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652457461] [2021-03-10 22:04:41,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:41,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652457461] [2021-03-10 22:04:41,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555788208] [2021-03-10 22:04:41,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:41,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:04:41,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:41,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:41,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:41,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:41,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:41,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551650751] [2021-03-10 22:04:41,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:41,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:41,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:41,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:41,852 INFO L87 Difference]: Start difference. First operand 297 states and 881 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:42,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:42,220 INFO L93 Difference]: Finished difference Result 594 states and 1686 transitions. [2021-03-10 22:04:42,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:42,221 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:42,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:42,221 INFO L225 Difference]: With dead ends: 594 [2021-03-10 22:04:42,221 INFO L226 Difference]: Without dead ends: 576 [2021-03-10 22:04:42,221 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 392.3ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:42,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-03-10 22:04:42,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 294. [2021-03-10 22:04:42,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.969283276450512) internal successors, (870), 293 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:42,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 870 transitions. [2021-03-10 22:04:42,225 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 870 transitions. Word has length 20 [2021-03-10 22:04:42,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:42,225 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 870 transitions. [2021-03-10 22:04:42,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:42,225 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 870 transitions. [2021-03-10 22:04:42,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:42,225 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:42,225 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:42,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4161,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:42,426 INFO L428 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:42,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:42,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1435633387, now seen corresponding path program 454 times [2021-03-10 22:04:42,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:42,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586919257] [2021-03-10 22:04:42,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:42,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586919257] [2021-03-10 22:04:42,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302276543] [2021-03-10 22:04:42,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:42,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:42,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:42,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:42,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:42,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:42,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:04:42,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665434926] [2021-03-10 22:04:42,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:42,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:42,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:42,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:42,772 INFO L87 Difference]: Start difference. First operand 294 states and 870 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:43,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:43,164 INFO L93 Difference]: Finished difference Result 604 states and 1731 transitions. [2021-03-10 22:04:43,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:43,164 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:43,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:43,165 INFO L225 Difference]: With dead ends: 604 [2021-03-10 22:04:43,165 INFO L226 Difference]: Without dead ends: 604 [2021-03-10 22:04:43,165 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 422.3ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:43,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-03-10 22:04:43,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 301. [2021-03-10 22:04:43,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.99) internal successors, (897), 300 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:43,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 897 transitions. [2021-03-10 22:04:43,169 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 897 transitions. Word has length 20 [2021-03-10 22:04:43,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:43,169 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 897 transitions. [2021-03-10 22:04:43,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:43,169 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 897 transitions. [2021-03-10 22:04:43,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:43,169 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:43,169 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:43,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4169,457 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:43,370 INFO L428 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:43,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:43,370 INFO L82 PathProgramCache]: Analyzing trace with hash -58274335, now seen corresponding path program 455 times [2021-03-10 22:04:43,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:43,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198488946] [2021-03-10 22:04:43,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:43,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198488946] [2021-03-10 22:04:43,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382397215] [2021-03-10 22:04:43,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:43,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:43,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:43,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:43,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:43,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:43,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:04:43,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400705632] [2021-03-10 22:04:43,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:43,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:43,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:43,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:43,724 INFO L87 Difference]: Start difference. First operand 301 states and 897 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:44,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:44,210 INFO L93 Difference]: Finished difference Result 610 states and 1738 transitions. [2021-03-10 22:04:44,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:04:44,210 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:44,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:44,211 INFO L225 Difference]: With dead ends: 610 [2021-03-10 22:04:44,211 INFO L226 Difference]: Without dead ends: 604 [2021-03-10 22:04:44,211 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 550.1ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:04:44,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-03-10 22:04:44,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 298. [2021-03-10 22:04:44,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.983164983164983) internal successors, (886), 297 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:44,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 886 transitions. [2021-03-10 22:04:44,215 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 886 transitions. Word has length 20 [2021-03-10 22:04:44,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:44,215 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 886 transitions. [2021-03-10 22:04:44,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:44,215 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 886 transitions. [2021-03-10 22:04:44,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:44,215 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:44,215 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:44,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4181,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:44,416 INFO L428 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:44,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:44,416 INFO L82 PathProgramCache]: Analyzing trace with hash 479581243, now seen corresponding path program 456 times [2021-03-10 22:04:44,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:44,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81605034] [2021-03-10 22:04:44,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:44,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81605034] [2021-03-10 22:04:44,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169802409] [2021-03-10 22:04:44,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:44,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:04:44,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:44,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:44,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:44,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:44,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:44,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:04:44,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595815287] [2021-03-10 22:04:44,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:44,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:44,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:44,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:44,773 INFO L87 Difference]: Start difference. First operand 298 states and 886 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:45,076 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-03-10 22:04:45,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:45,215 INFO L93 Difference]: Finished difference Result 574 states and 1656 transitions. [2021-03-10 22:04:45,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:45,215 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:45,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:45,216 INFO L225 Difference]: With dead ends: 574 [2021-03-10 22:04:45,216 INFO L226 Difference]: Without dead ends: 562 [2021-03-10 22:04:45,216 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 497.8ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:45,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-03-10 22:04:45,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 295. [2021-03-10 22:04:45,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9761904761904763) internal successors, (875), 294 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:45,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 875 transitions. [2021-03-10 22:04:45,221 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 875 transitions. Word has length 20 [2021-03-10 22:04:45,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:45,221 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 875 transitions. [2021-03-10 22:04:45,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:45,221 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 875 transitions. [2021-03-10 22:04:45,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:45,222 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:45,222 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:45,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4188,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:45,435 INFO L428 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:45,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:45,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1040756811, now seen corresponding path program 457 times [2021-03-10 22:04:45,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:45,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223104375] [2021-03-10 22:04:45,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:45,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223104375] [2021-03-10 22:04:45,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690439954] [2021-03-10 22:04:45,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:45,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:45,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:45,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:45,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:45,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:04:45,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189015022] [2021-03-10 22:04:45,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:45,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:45,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:45,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:45,817 INFO L87 Difference]: Start difference. First operand 295 states and 875 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:46,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:46,477 INFO L93 Difference]: Finished difference Result 682 states and 1928 transitions. [2021-03-10 22:04:46,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:04:46,477 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:46,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:46,478 INFO L225 Difference]: With dead ends: 682 [2021-03-10 22:04:46,478 INFO L226 Difference]: Without dead ends: 682 [2021-03-10 22:04:46,478 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 708.7ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:04:46,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-03-10 22:04:46,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 303. [2021-03-10 22:04:46,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.0165562913907285) internal successors, (911), 302 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:46,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 911 transitions. [2021-03-10 22:04:46,483 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 911 transitions. Word has length 20 [2021-03-10 22:04:46,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:46,483 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 911 transitions. [2021-03-10 22:04:46,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:46,483 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 911 transitions. [2021-03-10 22:04:46,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:46,483 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:46,483 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:46,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4198,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:46,683 INFO L428 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:46,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:46,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1760302763, now seen corresponding path program 458 times [2021-03-10 22:04:46,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:46,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065355335] [2021-03-10 22:04:46,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:46,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065355335] [2021-03-10 22:04:46,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889236987] [2021-03-10 22:04:46,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:46,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:46,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:46,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:46,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:47,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:47,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:04:47,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871480883] [2021-03-10 22:04:47,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:47,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:47,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:47,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:47,027 INFO L87 Difference]: Start difference. First operand 303 states and 911 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:47,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:47,773 INFO L93 Difference]: Finished difference Result 688 states and 1929 transitions. [2021-03-10 22:04:47,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:04:47,773 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:47,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:47,774 INFO L225 Difference]: With dead ends: 688 [2021-03-10 22:04:47,774 INFO L226 Difference]: Without dead ends: 682 [2021-03-10 22:04:47,774 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 762.9ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:04:47,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-03-10 22:04:47,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 306. [2021-03-10 22:04:47,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9934426229508198) internal successors, (913), 305 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:47,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 913 transitions. [2021-03-10 22:04:47,778 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 913 transitions. Word has length 20 [2021-03-10 22:04:47,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:47,778 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 913 transitions. [2021-03-10 22:04:47,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:47,778 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 913 transitions. [2021-03-10 22:04:47,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:47,779 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:47,779 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:47,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4212,461 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:47,979 INFO L428 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:47,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:47,979 INFO L82 PathProgramCache]: Analyzing trace with hash -289356373, now seen corresponding path program 459 times [2021-03-10 22:04:47,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:47,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229666602] [2021-03-10 22:04:47,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:48,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229666602] [2021-03-10 22:04:48,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403352482] [2021-03-10 22:04:48,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:48,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:04:48,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:48,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:04:48,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:48,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:04:48,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:48,303 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:48,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:48,306 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:48,307 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:48,309 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:48,310 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:48,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:04:48,314 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:48,316 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:48,317 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:48,319 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:48,320 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:48,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:48,323 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:48,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:04:48,326 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:48,328 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:48,329 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:48,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:04:48,332 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:48,381 INFO L628 ElimStorePlain]: treesize reduction 21, result has 70.0 percent of original size [2021-03-10 22:04:48,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:04:48,382 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:258, output treesize:49 [2021-03-10 22:04:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:48,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:48,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 22:04:48,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723538287] [2021-03-10 22:04:48,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:04:48,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:48,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:04:48,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:48,497 INFO L87 Difference]: Start difference. First operand 306 states and 913 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:48,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:48,930 INFO L93 Difference]: Finished difference Result 650 states and 1849 transitions. [2021-03-10 22:04:48,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:48,930 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:48,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:48,931 INFO L225 Difference]: With dead ends: 650 [2021-03-10 22:04:48,931 INFO L226 Difference]: Without dead ends: 650 [2021-03-10 22:04:48,931 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 490.9ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:48,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-03-10 22:04:48,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 299. [2021-03-10 22:04:48,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0033557046979866) internal successors, (895), 298 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:48,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 895 transitions. [2021-03-10 22:04:48,935 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 895 transitions. Word has length 20 [2021-03-10 22:04:48,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:48,935 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 895 transitions. [2021-03-10 22:04:48,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:48,935 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 895 transitions. [2021-03-10 22:04:48,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:48,935 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:48,935 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:49,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4225,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:49,136 INFO L428 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:49,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:49,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1002986027, now seen corresponding path program 460 times [2021-03-10 22:04:49,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:49,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951953779] [2021-03-10 22:04:49,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:49,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:49,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951953779] [2021-03-10 22:04:49,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045981393] [2021-03-10 22:04:49,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:49,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:49,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:49,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:49,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:49,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:49,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:04:49,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297008402] [2021-03-10 22:04:49,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:49,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:49,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:49,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:49,503 INFO L87 Difference]: Start difference. First operand 299 states and 895 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:49,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:49,909 INFO L93 Difference]: Finished difference Result 613 states and 1767 transitions. [2021-03-10 22:04:49,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:49,909 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:49,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:49,910 INFO L225 Difference]: With dead ends: 613 [2021-03-10 22:04:49,910 INFO L226 Difference]: Without dead ends: 613 [2021-03-10 22:04:49,910 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 470.7ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:49,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-03-10 22:04:49,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 296. [2021-03-10 22:04:49,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.983050847457627) internal successors, (880), 295 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:49,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 880 transitions. [2021-03-10 22:04:49,914 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 880 transitions. Word has length 20 [2021-03-10 22:04:49,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:49,914 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 880 transitions. [2021-03-10 22:04:49,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:49,914 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 880 transitions. [2021-03-10 22:04:49,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:49,914 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:49,914 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:50,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4239,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:50,115 INFO L428 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:50,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:50,115 INFO L82 PathProgramCache]: Analyzing trace with hash -268619845, now seen corresponding path program 461 times [2021-03-10 22:04:50,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:50,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001480732] [2021-03-10 22:04:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:50,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:50,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001480732] [2021-03-10 22:04:50,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937169243] [2021-03-10 22:04:50,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:50,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:50,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:50,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:50,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:50,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:50,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:04:50,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882504183] [2021-03-10 22:04:50,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:50,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:50,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:50,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:50,458 INFO L87 Difference]: Start difference. First operand 296 states and 880 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:51,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:51,118 INFO L93 Difference]: Finished difference Result 650 states and 1841 transitions. [2021-03-10 22:04:51,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:04:51,118 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:51,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:51,119 INFO L225 Difference]: With dead ends: 650 [2021-03-10 22:04:51,119 INFO L226 Difference]: Without dead ends: 644 [2021-03-10 22:04:51,119 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 694.1ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:04:51,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-03-10 22:04:51,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 306. [2021-03-10 22:04:51,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9737704918032786) internal successors, (907), 305 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:51,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 907 transitions. [2021-03-10 22:04:51,123 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 907 transitions. Word has length 20 [2021-03-10 22:04:51,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:51,123 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 907 transitions. [2021-03-10 22:04:51,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:51,123 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 907 transitions. [2021-03-10 22:04:51,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:51,123 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:51,123 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:51,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4250 [2021-03-10 22:04:51,324 INFO L428 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:51,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:51,324 INFO L82 PathProgramCache]: Analyzing trace with hash 2110923525, now seen corresponding path program 462 times [2021-03-10 22:04:51,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:51,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534024633] [2021-03-10 22:04:51,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:51,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534024633] [2021-03-10 22:04:51,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595886817] [2021-03-10 22:04:51,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:51,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:04:51,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:51,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:51,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:51,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:51,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:04:51,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667759261] [2021-03-10 22:04:51,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:51,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:51,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:51,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:51,653 INFO L87 Difference]: Start difference. First operand 306 states and 907 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:52,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:52,246 INFO L93 Difference]: Finished difference Result 627 states and 1802 transitions. [2021-03-10 22:04:52,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:04:52,246 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:52,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:52,247 INFO L225 Difference]: With dead ends: 627 [2021-03-10 22:04:52,247 INFO L226 Difference]: Without dead ends: 627 [2021-03-10 22:04:52,247 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 560.2ms TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:04:52,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-03-10 22:04:52,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 295. [2021-03-10 22:04:52,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9761904761904763) internal successors, (875), 294 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:52,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 875 transitions. [2021-03-10 22:04:52,251 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 875 transitions. Word has length 20 [2021-03-10 22:04:52,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:52,251 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 875 transitions. [2021-03-10 22:04:52,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:52,251 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 875 transitions. [2021-03-10 22:04:52,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:52,252 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:52,252 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:52,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4259,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:52,452 INFO L428 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:52,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:52,452 INFO L82 PathProgramCache]: Analyzing trace with hash 2007489835, now seen corresponding path program 463 times [2021-03-10 22:04:52,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:52,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044087412] [2021-03-10 22:04:52,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:52,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044087412] [2021-03-10 22:04:52,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715014737] [2021-03-10 22:04:52,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:52,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:52,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:52,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:52,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:52,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:04:52,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797142051] [2021-03-10 22:04:52,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:52,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:52,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:52,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:52,799 INFO L87 Difference]: Start difference. First operand 295 states and 875 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:53,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:53,140 INFO L93 Difference]: Finished difference Result 567 states and 1639 transitions. [2021-03-10 22:04:53,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:53,140 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:53,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:53,141 INFO L225 Difference]: With dead ends: 567 [2021-03-10 22:04:53,141 INFO L226 Difference]: Without dead ends: 555 [2021-03-10 22:04:53,141 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 431.5ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:53,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-03-10 22:04:53,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 297. [2021-03-10 22:04:53,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.972972972972973) internal successors, (880), 296 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:53,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 880 transitions. [2021-03-10 22:04:53,144 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 880 transitions. Word has length 20 [2021-03-10 22:04:53,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:53,145 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 880 transitions. [2021-03-10 22:04:53,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:53,145 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 880 transitions. [2021-03-10 22:04:53,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:53,145 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:53,145 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:53,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4267,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:53,345 INFO L428 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:53,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:53,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1536077023, now seen corresponding path program 464 times [2021-03-10 22:04:53,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:53,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851281738] [2021-03-10 22:04:53,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:53,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851281738] [2021-03-10 22:04:53,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716267148] [2021-03-10 22:04:53,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:53,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:53,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:53,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:53,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:53,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:53,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:04:53,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842451299] [2021-03-10 22:04:53,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:53,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:53,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:53,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:53,684 INFO L87 Difference]: Start difference. First operand 297 states and 880 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:54,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:54,170 INFO L93 Difference]: Finished difference Result 592 states and 1691 transitions. [2021-03-10 22:04:54,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:04:54,170 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:54,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:54,171 INFO L225 Difference]: With dead ends: 592 [2021-03-10 22:04:54,171 INFO L226 Difference]: Without dead ends: 586 [2021-03-10 22:04:54,171 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 544.2ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:04:54,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-03-10 22:04:54,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 307. [2021-03-10 22:04:54,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9640522875816995) internal successors, (907), 306 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:54,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2021-03-10 22:04:54,175 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2021-03-10 22:04:54,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:54,175 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2021-03-10 22:04:54,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:54,175 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2021-03-10 22:04:54,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:54,175 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:54,175 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:54,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4275,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:54,376 INFO L428 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:54,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:54,376 INFO L82 PathProgramCache]: Analyzing trace with hash 843466347, now seen corresponding path program 465 times [2021-03-10 22:04:54,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:54,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126834778] [2021-03-10 22:04:54,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:54,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:54,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126834778] [2021-03-10 22:04:54,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367589219] [2021-03-10 22:04:54,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:54,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:04:54,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:54,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:54,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:54,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:54,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:04:54,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647542967] [2021-03-10 22:04:54,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:54,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:54,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:54,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:54,719 INFO L87 Difference]: Start difference. First operand 307 states and 907 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:55,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:55,066 INFO L93 Difference]: Finished difference Result 563 states and 1637 transitions. [2021-03-10 22:04:55,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:55,066 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:55,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:55,067 INFO L225 Difference]: With dead ends: 563 [2021-03-10 22:04:55,067 INFO L226 Difference]: Without dead ends: 563 [2021-03-10 22:04:55,067 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 421.9ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:55,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-03-10 22:04:55,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 294. [2021-03-10 22:04:55,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.969283276450512) internal successors, (870), 293 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:55,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 870 transitions. [2021-03-10 22:04:55,074 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 870 transitions. Word has length 20 [2021-03-10 22:04:55,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:55,074 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 870 transitions. [2021-03-10 22:04:55,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:55,074 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 870 transitions. [2021-03-10 22:04:55,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:55,075 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:55,075 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:55,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4284 [2021-03-10 22:04:55,275 INFO L428 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:55,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:55,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1065644357, now seen corresponding path program 466 times [2021-03-10 22:04:55,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:55,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425718920] [2021-03-10 22:04:55,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:55,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425718920] [2021-03-10 22:04:55,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839730470] [2021-03-10 22:04:55,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:55,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:55,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:55,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:55,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:55,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:55,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:04:55,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474332136] [2021-03-10 22:04:55,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:55,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:55,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:55,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:55,580 INFO L87 Difference]: Start difference. First operand 294 states and 870 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:55,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:55,987 INFO L93 Difference]: Finished difference Result 651 states and 1821 transitions. [2021-03-10 22:04:55,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:55,987 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:55,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:55,988 INFO L225 Difference]: With dead ends: 651 [2021-03-10 22:04:55,988 INFO L226 Difference]: Without dead ends: 633 [2021-03-10 22:04:55,988 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 428.4ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:55,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-03-10 22:04:55,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 296. [2021-03-10 22:04:55,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.9661016949152543) internal successors, (875), 295 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:55,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 875 transitions. [2021-03-10 22:04:55,992 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 875 transitions. Word has length 20 [2021-03-10 22:04:55,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:55,992 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 875 transitions. [2021-03-10 22:04:55,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:55,992 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 875 transitions. [2021-03-10 22:04:55,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:55,993 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:55,993 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:56,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4295,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:56,193 INFO L428 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:56,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:56,193 INFO L82 PathProgramCache]: Analyzing trace with hash 946711745, now seen corresponding path program 467 times [2021-03-10 22:04:56,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:56,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098876166] [2021-03-10 22:04:56,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:56,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098876166] [2021-03-10 22:04:56,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551830201] [2021-03-10 22:04:56,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:56,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:56,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:56,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:56,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:56,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:56,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:04:56,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718665936] [2021-03-10 22:04:56,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:56,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:56,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:56,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:56,506 INFO L87 Difference]: Start difference. First operand 296 states and 875 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:56,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:56,930 INFO L93 Difference]: Finished difference Result 612 states and 1742 transitions. [2021-03-10 22:04:56,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:56,930 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:56,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:56,931 INFO L225 Difference]: With dead ends: 612 [2021-03-10 22:04:56,931 INFO L226 Difference]: Without dead ends: 600 [2021-03-10 22:04:56,931 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 466.9ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:56,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-03-10 22:04:56,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 298. [2021-03-10 22:04:56,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.962962962962963) internal successors, (880), 297 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:56,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 880 transitions. [2021-03-10 22:04:56,935 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 880 transitions. Word has length 20 [2021-03-10 22:04:56,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:56,935 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 880 transitions. [2021-03-10 22:04:56,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:56,935 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 880 transitions. [2021-03-10 22:04:56,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:56,935 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:56,935 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:57,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4303,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:57,136 INFO L428 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:57,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:57,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1698112183, now seen corresponding path program 468 times [2021-03-10 22:04:57,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:57,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365601110] [2021-03-10 22:04:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:57,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365601110] [2021-03-10 22:04:57,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370559334] [2021-03-10 22:04:57,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:57,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:04:57,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:57,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:57,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:57,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:57,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:04:57,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572632826] [2021-03-10 22:04:57,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:57,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:57,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:57,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:57,454 INFO L87 Difference]: Start difference. First operand 298 states and 880 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:58,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:58,062 INFO L93 Difference]: Finished difference Result 637 states and 1794 transitions. [2021-03-10 22:04:58,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:04:58,063 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:58,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:58,063 INFO L225 Difference]: With dead ends: 637 [2021-03-10 22:04:58,063 INFO L226 Difference]: Without dead ends: 631 [2021-03-10 22:04:58,063 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 657.2ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:04:58,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-03-10 22:04:58,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 308. [2021-03-10 22:04:58,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.954397394136808) internal successors, (907), 307 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:58,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 907 transitions. [2021-03-10 22:04:58,067 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 907 transitions. Word has length 20 [2021-03-10 22:04:58,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:58,067 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 907 transitions. [2021-03-10 22:04:58,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:58,068 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 907 transitions. [2021-03-10 22:04:58,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:58,068 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:58,068 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:58,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4310 [2021-03-10 22:04:58,268 INFO L428 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:58,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:58,268 INFO L82 PathProgramCache]: Analyzing trace with hash -217311743, now seen corresponding path program 469 times [2021-03-10 22:04:58,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:58,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427003967] [2021-03-10 22:04:58,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:58,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427003967] [2021-03-10 22:04:58,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529635222] [2021-03-10 22:04:58,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:58,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:58,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:58,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:58,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:04:58,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369979870] [2021-03-10 22:04:58,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:58,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:58,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:58,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:58,580 INFO L87 Difference]: Start difference. First operand 308 states and 907 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:59,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:59,030 INFO L93 Difference]: Finished difference Result 608 states and 1740 transitions. [2021-03-10 22:04:59,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:59,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:59,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:59,031 INFO L225 Difference]: With dead ends: 608 [2021-03-10 22:04:59,031 INFO L226 Difference]: Without dead ends: 608 [2021-03-10 22:04:59,031 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 455.3ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:59,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-03-10 22:04:59,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 293. [2021-03-10 22:04:59,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.962328767123288) internal successors, (865), 292 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:59,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-03-10 22:04:59,035 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-03-10 22:04:59,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:59,035 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-03-10 22:04:59,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:59,035 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-03-10 22:04:59,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:59,035 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:59,035 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:59,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4323,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:59,236 INFO L428 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:59,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:59,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1114969903, now seen corresponding path program 470 times [2021-03-10 22:04:59,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:59,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705883766] [2021-03-10 22:04:59,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:59,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705883766] [2021-03-10 22:04:59,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8942985] [2021-03-10 22:04:59,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:59,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:59,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:59,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:04:59,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:59,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:59,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:04:59,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965495736] [2021-03-10 22:04:59,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:59,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:59,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:59,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:59,565 INFO L87 Difference]: Start difference. First operand 293 states and 865 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:59,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:59,851 INFO L93 Difference]: Finished difference Result 489 states and 1405 transitions. [2021-03-10 22:04:59,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:59,851 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:04:59,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:59,852 INFO L225 Difference]: With dead ends: 489 [2021-03-10 22:04:59,852 INFO L226 Difference]: Without dead ends: 489 [2021-03-10 22:04:59,852 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 313.1ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:59,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-03-10 22:04:59,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 301. [2021-03-10 22:04:59,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.986666666666667) internal successors, (896), 300 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:59,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 896 transitions. [2021-03-10 22:04:59,856 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 896 transitions. Word has length 20 [2021-03-10 22:04:59,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:59,856 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 896 transitions. [2021-03-10 22:04:59,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:59,856 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 896 transitions. [2021-03-10 22:04:59,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:04:59,856 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:59,856 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:00,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 473 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4332 [2021-03-10 22:05:00,057 INFO L428 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:00,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:00,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1686089671, now seen corresponding path program 471 times [2021-03-10 22:05:00,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:00,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034930724] [2021-03-10 22:05:00,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:00,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:00,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034930724] [2021-03-10 22:05:00,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692964394] [2021-03-10 22:05:00,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:00,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:05:00,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:00,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:00,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:00,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:00,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:00,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:00,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906485237] [2021-03-10 22:05:00,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:00,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:00,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:00,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:00,368 INFO L87 Difference]: Start difference. First operand 301 states and 896 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:00,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:00,674 INFO L93 Difference]: Finished difference Result 495 states and 1412 transitions. [2021-03-10 22:05:00,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:00,674 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:00,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:00,675 INFO L225 Difference]: With dead ends: 495 [2021-03-10 22:05:00,675 INFO L226 Difference]: Without dead ends: 489 [2021-03-10 22:05:00,675 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 338.2ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:00,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-03-10 22:05:00,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 298. [2021-03-10 22:05:00,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9797979797979797) internal successors, (885), 297 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:00,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-03-10 22:05:00,678 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-03-10 22:05:00,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:00,678 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-03-10 22:05:00,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:00,678 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-03-10 22:05:00,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:00,679 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:00,679 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:00,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4345,474 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:00,879 INFO L428 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:00,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:00,879 INFO L82 PathProgramCache]: Analyzing trace with hash -2071022047, now seen corresponding path program 472 times [2021-03-10 22:05:00,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:00,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649181538] [2021-03-10 22:05:00,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:00,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649181538] [2021-03-10 22:05:00,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553726790] [2021-03-10 22:05:00,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:01,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:01,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:01,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:01,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:01,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:01,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:01,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712061453] [2021-03-10 22:05:01,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:01,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:01,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:01,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:01,207 INFO L87 Difference]: Start difference. First operand 298 states and 885 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:01,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:01,503 INFO L93 Difference]: Finished difference Result 459 states and 1330 transitions. [2021-03-10 22:05:01,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:01,503 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:01,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:01,504 INFO L225 Difference]: With dead ends: 459 [2021-03-10 22:05:01,504 INFO L226 Difference]: Without dead ends: 447 [2021-03-10 22:05:01,504 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 346.6ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:01,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-03-10 22:05:01,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 295. [2021-03-10 22:05:01,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9727891156462585) internal successors, (874), 294 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:01,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-03-10 22:05:01,507 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-03-10 22:05:01,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:01,507 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-03-10 22:05:01,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:01,507 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-03-10 22:05:01,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:01,508 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:01,508 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:01,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4352,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:01,708 INFO L428 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:01,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:01,708 INFO L82 PathProgramCache]: Analyzing trace with hash 703607195, now seen corresponding path program 473 times [2021-03-10 22:05:01,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:01,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629794198] [2021-03-10 22:05:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:01,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629794198] [2021-03-10 22:05:01,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499375038] [2021-03-10 22:05:01,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:01,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:01,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:01,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:01,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:02,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:02,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:02,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:02,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703499588] [2021-03-10 22:05:02,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:02,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:02,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:02,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:02,025 INFO L87 Difference]: Start difference. First operand 295 states and 874 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:02,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:02,378 INFO L93 Difference]: Finished difference Result 576 states and 1623 transitions. [2021-03-10 22:05:02,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:02,379 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:02,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:02,380 INFO L225 Difference]: With dead ends: 576 [2021-03-10 22:05:02,380 INFO L226 Difference]: Without dead ends: 576 [2021-03-10 22:05:02,380 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 378.7ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:05:02,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-03-10 22:05:02,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 303. [2021-03-10 22:05:02,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.013245033112583) internal successors, (910), 302 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:02,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2021-03-10 22:05:02,383 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2021-03-10 22:05:02,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:02,384 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2021-03-10 22:05:02,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:02,384 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2021-03-10 22:05:02,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:02,384 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:02,384 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:02,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4362 [2021-03-10 22:05:02,584 INFO L428 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:02,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:02,585 INFO L82 PathProgramCache]: Analyzing trace with hash -790300527, now seen corresponding path program 474 times [2021-03-10 22:05:02,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:02,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556435726] [2021-03-10 22:05:02,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:02,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556435726] [2021-03-10 22:05:02,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031984664] [2021-03-10 22:05:02,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:02,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:05:02,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:02,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:02,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:02,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:02,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:02,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804565797] [2021-03-10 22:05:02,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:02,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:02,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:02,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:02,951 INFO L87 Difference]: Start difference. First operand 303 states and 910 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:03,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:03,394 INFO L93 Difference]: Finished difference Result 582 states and 1624 transitions. [2021-03-10 22:05:03,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:03,394 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:03,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:03,395 INFO L225 Difference]: With dead ends: 582 [2021-03-10 22:05:03,395 INFO L226 Difference]: Without dead ends: 576 [2021-03-10 22:05:03,395 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 466.0ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:05:03,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-03-10 22:05:03,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 306. [2021-03-10 22:05:03,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9901639344262296) internal successors, (912), 305 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:03,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 912 transitions. [2021-03-10 22:05:03,399 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 912 transitions. Word has length 20 [2021-03-10 22:05:03,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:03,399 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 912 transitions. [2021-03-10 22:05:03,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:03,399 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 912 transitions. [2021-03-10 22:05:03,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:03,400 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:03,400 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:03,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4370 [2021-03-10 22:05:03,600 INFO L428 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:03,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:03,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1455007633, now seen corresponding path program 475 times [2021-03-10 22:05:03,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:03,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146094946] [2021-03-10 22:05:03,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:03,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146094946] [2021-03-10 22:05:03,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163262303] [2021-03-10 22:05:03,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:03,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:03,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:03,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:03,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:03,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890248014] [2021-03-10 22:05:03,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:03,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:03,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:03,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:03,921 INFO L87 Difference]: Start difference. First operand 306 states and 912 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:04,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:04,174 INFO L93 Difference]: Finished difference Result 544 states and 1544 transitions. [2021-03-10 22:05:04,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:04,174 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:04,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:04,175 INFO L225 Difference]: With dead ends: 544 [2021-03-10 22:05:04,175 INFO L226 Difference]: Without dead ends: 544 [2021-03-10 22:05:04,175 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 257.7ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:04,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-03-10 22:05:04,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 299. [2021-03-10 22:05:04,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0) internal successors, (894), 298 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:04,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 894 transitions. [2021-03-10 22:05:04,179 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 894 transitions. Word has length 20 [2021-03-10 22:05:04,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:04,179 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 894 transitions. [2021-03-10 22:05:04,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:04,179 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 894 transitions. [2021-03-10 22:05:04,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:04,179 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:04,179 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:04,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4379 [2021-03-10 22:05:04,380 INFO L428 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:04,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:04,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1547617263, now seen corresponding path program 476 times [2021-03-10 22:05:04,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:04,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063603609] [2021-03-10 22:05:04,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:04,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063603609] [2021-03-10 22:05:04,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129489710] [2021-03-10 22:05:04,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:04,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:04,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:04,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:04,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:04,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:04,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:04,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597782631] [2021-03-10 22:05:04,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:04,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:04,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:04,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:04,736 INFO L87 Difference]: Start difference. First operand 299 states and 894 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:04,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:04,956 INFO L93 Difference]: Finished difference Result 507 states and 1462 transitions. [2021-03-10 22:05:04,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:04,956 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:04,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:04,957 INFO L225 Difference]: With dead ends: 507 [2021-03-10 22:05:04,957 INFO L226 Difference]: Without dead ends: 507 [2021-03-10 22:05:04,957 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 301.2ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:04,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-03-10 22:05:04,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 296. [2021-03-10 22:05:04,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.9796610169491524) internal successors, (879), 295 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:04,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 879 transitions. [2021-03-10 22:05:04,960 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 879 transitions. Word has length 20 [2021-03-10 22:05:04,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:04,960 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 879 transitions. [2021-03-10 22:05:04,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:04,961 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 879 transitions. [2021-03-10 22:05:04,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:04,961 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:04,961 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:05,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4387 [2021-03-10 22:05:05,161 INFO L428 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:05,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:05,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1475744161, now seen corresponding path program 477 times [2021-03-10 22:05:05,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:05,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444981871] [2021-03-10 22:05:05,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:05,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:05,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444981871] [2021-03-10 22:05:05,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747156556] [2021-03-10 22:05:05,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:05,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:05:05,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:05,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:05,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:05,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:05,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:05,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40187701] [2021-03-10 22:05:05,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:05,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:05,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:05,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:05,490 INFO L87 Difference]: Start difference. First operand 296 states and 879 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:05,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:05,948 INFO L93 Difference]: Finished difference Result 544 states and 1536 transitions. [2021-03-10 22:05:05,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:05,949 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:05,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:05,949 INFO L225 Difference]: With dead ends: 544 [2021-03-10 22:05:05,949 INFO L226 Difference]: Without dead ends: 538 [2021-03-10 22:05:05,950 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 425.2ms TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:05:05,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-03-10 22:05:05,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 306. [2021-03-10 22:05:05,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9704918032786884) internal successors, (906), 305 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 906 transitions. [2021-03-10 22:05:05,953 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 906 transitions. Word has length 20 [2021-03-10 22:05:05,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:05,953 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 906 transitions. [2021-03-10 22:05:05,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:05,954 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 906 transitions. [2021-03-10 22:05:05,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:05,954 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:05,954 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:06,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4395 [2021-03-10 22:05:06,154 INFO L428 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:06,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:06,155 INFO L82 PathProgramCache]: Analyzing trace with hash -439679765, now seen corresponding path program 478 times [2021-03-10 22:05:06,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:06,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690477329] [2021-03-10 22:05:06,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:06,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690477329] [2021-03-10 22:05:06,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597302920] [2021-03-10 22:05:06,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:06,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:06,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:06,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:06,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:06,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:06,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:06,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775828610] [2021-03-10 22:05:06,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:06,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:06,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:06,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:06,463 INFO L87 Difference]: Start difference. First operand 306 states and 906 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:06,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:06,823 INFO L93 Difference]: Finished difference Result 521 states and 1497 transitions. [2021-03-10 22:05:06,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:06,824 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:06,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:06,824 INFO L225 Difference]: With dead ends: 521 [2021-03-10 22:05:06,824 INFO L226 Difference]: Without dead ends: 521 [2021-03-10 22:05:06,824 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:05:06,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-03-10 22:05:06,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 295. [2021-03-10 22:05:06,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9727891156462585) internal successors, (874), 294 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:06,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-03-10 22:05:06,828 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-03-10 22:05:06,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:06,828 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-03-10 22:05:06,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:06,828 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-03-10 22:05:06,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:06,828 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:06,828 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:07,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4406,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:07,029 INFO L428 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:07,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:07,029 INFO L82 PathProgramCache]: Analyzing trace with hash -543113455, now seen corresponding path program 479 times [2021-03-10 22:05:07,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:07,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624048292] [2021-03-10 22:05:07,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:07,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:07,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624048292] [2021-03-10 22:05:07,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016834228] [2021-03-10 22:05:07,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:07,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:07,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:07,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:07,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:07,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:07,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:07,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511703445] [2021-03-10 22:05:07,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:07,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:07,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:07,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:07,393 INFO L87 Difference]: Start difference. First operand 295 states and 874 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:07,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:07,722 INFO L93 Difference]: Finished difference Result 461 states and 1334 transitions. [2021-03-10 22:05:07,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:07,722 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:07,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:07,723 INFO L225 Difference]: With dead ends: 461 [2021-03-10 22:05:07,723 INFO L226 Difference]: Without dead ends: 449 [2021-03-10 22:05:07,723 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 429.3ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:07,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-03-10 22:05:07,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 297. [2021-03-10 22:05:07,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9695945945945947) internal successors, (879), 296 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:07,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2021-03-10 22:05:07,726 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 20 [2021-03-10 22:05:07,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:07,726 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2021-03-10 22:05:07,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:07,726 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2021-03-10 22:05:07,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:07,726 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:07,726 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:07,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4414,482 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:07,927 INFO L428 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:07,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:07,927 INFO L82 PathProgramCache]: Analyzing trace with hash 208286983, now seen corresponding path program 480 times [2021-03-10 22:05:07,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:07,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639437673] [2021-03-10 22:05:07,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:07,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:07,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639437673] [2021-03-10 22:05:07,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098469620] [2021-03-10 22:05:07,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:08,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:05:08,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:08,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:08,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:08,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:08,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:08,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681039165] [2021-03-10 22:05:08,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:08,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:08,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:08,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:08,248 INFO L87 Difference]: Start difference. First operand 297 states and 879 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:08,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:08,577 INFO L93 Difference]: Finished difference Result 486 states and 1386 transitions. [2021-03-10 22:05:08,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:08,578 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:08,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:08,578 INFO L225 Difference]: With dead ends: 486 [2021-03-10 22:05:08,578 INFO L226 Difference]: Without dead ends: 480 [2021-03-10 22:05:08,579 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 395.6ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:05:08,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-03-10 22:05:08,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 307. [2021-03-10 22:05:08,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9607843137254903) internal successors, (906), 306 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:08,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 906 transitions. [2021-03-10 22:05:08,582 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 906 transitions. Word has length 20 [2021-03-10 22:05:08,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:08,582 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 906 transitions. [2021-03-10 22:05:08,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:08,582 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 906 transitions. [2021-03-10 22:05:08,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:08,582 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:08,583 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:08,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4423,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:08,783 INFO L428 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:08,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:08,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1707136943, now seen corresponding path program 481 times [2021-03-10 22:05:08,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:08,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126702194] [2021-03-10 22:05:08,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:08,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126702194] [2021-03-10 22:05:08,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539585365] [2021-03-10 22:05:08,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:08,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:08,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:09,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:09,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:09,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449949456] [2021-03-10 22:05:09,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:09,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:09,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:09,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:09,117 INFO L87 Difference]: Start difference. First operand 307 states and 906 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:09,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:09,350 INFO L93 Difference]: Finished difference Result 457 states and 1332 transitions. [2021-03-10 22:05:09,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:09,350 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:09,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:09,351 INFO L225 Difference]: With dead ends: 457 [2021-03-10 22:05:09,351 INFO L226 Difference]: Without dead ends: 457 [2021-03-10 22:05:09,351 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 321.2ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:09,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-03-10 22:05:09,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 294. [2021-03-10 22:05:09,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:09,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-03-10 22:05:09,354 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-03-10 22:05:09,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:09,354 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-03-10 22:05:09,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:09,355 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-03-10 22:05:09,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:09,355 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:09,355 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:09,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4431 [2021-03-10 22:05:09,555 INFO L428 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:09,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:09,556 INFO L82 PathProgramCache]: Analyzing trace with hash -357170895, now seen corresponding path program 482 times [2021-03-10 22:05:09,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:09,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148480546] [2021-03-10 22:05:09,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:09,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148480546] [2021-03-10 22:05:09,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162138200] [2021-03-10 22:05:09,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:09,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:09,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:09,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:09,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:09,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:09,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:09,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085573411] [2021-03-10 22:05:09,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:09,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:09,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:09,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:09,858 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:10,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:10,161 INFO L93 Difference]: Finished difference Result 586 states and 1637 transitions. [2021-03-10 22:05:10,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:10,161 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:10,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:10,162 INFO L225 Difference]: With dead ends: 586 [2021-03-10 22:05:10,162 INFO L226 Difference]: Without dead ends: 586 [2021-03-10 22:05:10,162 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 317.0ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:05:10,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-03-10 22:05:10,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 304. [2021-03-10 22:05:10,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0165016501650164) internal successors, (914), 303 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:10,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 914 transitions. [2021-03-10 22:05:10,166 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 914 transitions. Word has length 20 [2021-03-10 22:05:10,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:10,166 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 914 transitions. [2021-03-10 22:05:10,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:10,166 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 914 transitions. [2021-03-10 22:05:10,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:10,167 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:10,167 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:10,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4440,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:10,383 INFO L428 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:10,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:10,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1851078617, now seen corresponding path program 483 times [2021-03-10 22:05:10,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:10,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585383028] [2021-03-10 22:05:10,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:10,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:10,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585383028] [2021-03-10 22:05:10,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857006604] [2021-03-10 22:05:10,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:10,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:05:10,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:10,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:10,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:10,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:10,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:10,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762329590] [2021-03-10 22:05:10,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:10,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:10,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:10,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:10,683 INFO L87 Difference]: Start difference. First operand 304 states and 914 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:10,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:10,904 INFO L93 Difference]: Finished difference Result 540 states and 1535 transitions. [2021-03-10 22:05:10,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:10,904 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:10,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:10,905 INFO L225 Difference]: With dead ends: 540 [2021-03-10 22:05:10,905 INFO L226 Difference]: Without dead ends: 534 [2021-03-10 22:05:10,905 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 251.4ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:10,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-03-10 22:05:10,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 307. [2021-03-10 22:05:10,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9934640522875817) internal successors, (916), 306 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-03-10 22:05:10,909 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-03-10 22:05:10,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:10,909 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-03-10 22:05:10,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:10,909 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-03-10 22:05:10,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:10,909 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:10,910 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:11,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4450 [2021-03-10 22:05:11,110 INFO L428 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:11,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:11,110 INFO L82 PathProgramCache]: Analyzing trace with hash 394229543, now seen corresponding path program 484 times [2021-03-10 22:05:11,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:11,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035724504] [2021-03-10 22:05:11,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:11,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035724504] [2021-03-10 22:05:11,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592781452] [2021-03-10 22:05:11,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:11,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:11,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:11,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:11,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:11,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:11,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:11,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001206908] [2021-03-10 22:05:11,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:11,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:11,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:11,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:11,412 INFO L87 Difference]: Start difference. First operand 307 states and 916 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:11,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:11,647 INFO L93 Difference]: Finished difference Result 592 states and 1677 transitions. [2021-03-10 22:05:11,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:11,648 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:11,648 INFO L225 Difference]: With dead ends: 592 [2021-03-10 22:05:11,648 INFO L226 Difference]: Without dead ends: 592 [2021-03-10 22:05:11,649 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:11,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-03-10 22:05:11,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 310. [2021-03-10 22:05:11,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.01294498381877) internal successors, (931), 309 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:11,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 931 transitions. [2021-03-10 22:05:11,652 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 931 transitions. Word has length 20 [2021-03-10 22:05:11,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:11,653 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 931 transitions. [2021-03-10 22:05:11,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:11,653 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 931 transitions. [2021-03-10 22:05:11,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:11,653 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:11,653 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:11,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4461,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:11,853 INFO L428 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:11,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:11,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1686571943, now seen corresponding path program 485 times [2021-03-10 22:05:11,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:11,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008950930] [2021-03-10 22:05:11,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:11,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:11,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008950930] [2021-03-10 22:05:11,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078269488] [2021-03-10 22:05:11,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:12,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:12,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:12,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:12,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:12,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:12,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:12,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966503911] [2021-03-10 22:05:12,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:12,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:12,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:12,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:12,164 INFO L87 Difference]: Start difference. First operand 310 states and 931 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:12,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:12,362 INFO L93 Difference]: Finished difference Result 555 states and 1595 transitions. [2021-03-10 22:05:12,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:12,363 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:12,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:12,363 INFO L225 Difference]: With dead ends: 555 [2021-03-10 22:05:12,363 INFO L226 Difference]: Without dead ends: 555 [2021-03-10 22:05:12,363 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:12,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-03-10 22:05:12,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 307. [2021-03-10 22:05:12,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9934640522875817) internal successors, (916), 306 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:12,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-03-10 22:05:12,367 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-03-10 22:05:12,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:12,367 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-03-10 22:05:12,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:12,367 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-03-10 22:05:12,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:12,368 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:12,368 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:12,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4471 [2021-03-10 22:05:12,568 INFO L428 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:12,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:12,568 INFO L82 PathProgramCache]: Analyzing trace with hash 414966071, now seen corresponding path program 486 times [2021-03-10 22:05:12,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:12,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335500999] [2021-03-10 22:05:12,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:12,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335500999] [2021-03-10 22:05:12,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249015672] [2021-03-10 22:05:12,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:12,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:05:12,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:12,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:05:12,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:12,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:05:12,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:12,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:12,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:12,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:05:12,843 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:12,845 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:12,846 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:12,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:12,849 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:12,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:05:12,852 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:12,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:05:12,855 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:12,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:05:12,870 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:12,920 INFO L628 ElimStorePlain]: treesize reduction 21, result has 70.0 percent of original size [2021-03-10 22:05:12,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:05:12,921 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:177, output treesize:49 [2021-03-10 22:05:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:13,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:13,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 22:05:13,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579365562] [2021-03-10 22:05:13,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:05:13,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:13,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:05:13,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:05:13,033 INFO L87 Difference]: Start difference. First operand 307 states and 916 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:13,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:13,429 INFO L93 Difference]: Finished difference Result 580 states and 1629 transitions. [2021-03-10 22:05:13,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:13,429 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:13,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:13,430 INFO L225 Difference]: With dead ends: 580 [2021-03-10 22:05:13,430 INFO L226 Difference]: Without dead ends: 574 [2021-03-10 22:05:13,430 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 405.5ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:05:13,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-03-10 22:05:13,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 311. [2021-03-10 22:05:13,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0) internal successors, (930), 310 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:13,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-03-10 22:05:13,434 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-03-10 22:05:13,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:13,434 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-03-10 22:05:13,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:13,434 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-03-10 22:05:13,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:13,434 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:13,434 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:13,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4480,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:13,635 INFO L428 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:13,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:13,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1500457855, now seen corresponding path program 487 times [2021-03-10 22:05:13,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:13,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826685233] [2021-03-10 22:05:13,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:13,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:13,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826685233] [2021-03-10 22:05:13,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357280094] [2021-03-10 22:05:13,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:13,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:13,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:13,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:13,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:13,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073545606] [2021-03-10 22:05:13,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:13,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:13,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:13,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:13,977 INFO L87 Difference]: Start difference. First operand 311 states and 930 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:14,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:14,273 INFO L93 Difference]: Finished difference Result 586 states and 1650 transitions. [2021-03-10 22:05:14,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:14,274 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:14,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:14,274 INFO L225 Difference]: With dead ends: 586 [2021-03-10 22:05:14,274 INFO L226 Difference]: Without dead ends: 586 [2021-03-10 22:05:14,275 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 344.0ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:14,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-03-10 22:05:14,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 308. [2021-03-10 22:05:14,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.996742671009772) internal successors, (920), 307 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 920 transitions. [2021-03-10 22:05:14,278 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 920 transitions. Word has length 20 [2021-03-10 22:05:14,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:14,279 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 920 transitions. [2021-03-10 22:05:14,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:14,279 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 920 transitions. [2021-03-10 22:05:14,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:14,279 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:14,279 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:14,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4493 [2021-03-10 22:05:14,479 INFO L428 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:14,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:14,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1718199087, now seen corresponding path program 488 times [2021-03-10 22:05:14,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:14,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116523106] [2021-03-10 22:05:14,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:14,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116523106] [2021-03-10 22:05:14,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121870419] [2021-03-10 22:05:14,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:14,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:14,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:14,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:14,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:14,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:14,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:14,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712745448] [2021-03-10 22:05:14,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:14,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:14,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:14,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:14,806 INFO L87 Difference]: Start difference. First operand 308 states and 920 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:15,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:15,030 INFO L93 Difference]: Finished difference Result 516 states and 1495 transitions. [2021-03-10 22:05:15,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:15,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:15,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:15,031 INFO L225 Difference]: With dead ends: 516 [2021-03-10 22:05:15,031 INFO L226 Difference]: Without dead ends: 516 [2021-03-10 22:05:15,031 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 249.7ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:15,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-03-10 22:05:15,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 309. [2021-03-10 22:05:15,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9935064935064934) internal successors, (922), 308 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:15,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 922 transitions. [2021-03-10 22:05:15,034 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 922 transitions. Word has length 20 [2021-03-10 22:05:15,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:15,035 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 922 transitions. [2021-03-10 22:05:15,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:15,035 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 922 transitions. [2021-03-10 22:05:15,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:15,035 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:15,035 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:15,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4502,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:15,235 INFO L428 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:15,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:15,236 INFO L82 PathProgramCache]: Analyzing trace with hash -425856687, now seen corresponding path program 489 times [2021-03-10 22:05:15,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:15,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184984425] [2021-03-10 22:05:15,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:15,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184984425] [2021-03-10 22:05:15,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705260974] [2021-03-10 22:05:15,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:15,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:05:15,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:15,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:15,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:15,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:15,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:15,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315127816] [2021-03-10 22:05:15,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:15,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:15,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:15,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:15,560 INFO L87 Difference]: Start difference. First operand 309 states and 922 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:15,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:15,773 INFO L93 Difference]: Finished difference Result 504 states and 1462 transitions. [2021-03-10 22:05:15,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:15,773 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:15,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:15,773 INFO L225 Difference]: With dead ends: 504 [2021-03-10 22:05:15,774 INFO L226 Difference]: Without dead ends: 504 [2021-03-10 22:05:15,774 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 264.2ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:15,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-03-10 22:05:15,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 298. [2021-03-10 22:05:15,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9797979797979797) internal successors, (885), 297 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:15,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-03-10 22:05:15,777 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-03-10 22:05:15,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:15,777 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-03-10 22:05:15,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:15,777 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-03-10 22:05:15,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:15,777 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:15,778 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:15,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4509 [2021-03-10 22:05:15,978 INFO L428 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:15,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:15,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1973245573, now seen corresponding path program 490 times [2021-03-10 22:05:15,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:15,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647092676] [2021-03-10 22:05:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:16,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647092676] [2021-03-10 22:05:16,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244681645] [2021-03-10 22:05:16,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:16,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:16,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:16,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:16,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:16,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:16,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:16,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676982619] [2021-03-10 22:05:16,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:16,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:16,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:16,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:16,283 INFO L87 Difference]: Start difference. First operand 298 states and 885 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:16,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:16,470 INFO L93 Difference]: Finished difference Result 459 states and 1340 transitions. [2021-03-10 22:05:16,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:16,471 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:16,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:16,471 INFO L225 Difference]: With dead ends: 459 [2021-03-10 22:05:16,471 INFO L226 Difference]: Without dead ends: 459 [2021-03-10 22:05:16,471 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 233.5ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:16,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-03-10 22:05:16,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 295. [2021-03-10 22:05:16,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9693877551020407) internal successors, (873), 294 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:16,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 873 transitions. [2021-03-10 22:05:16,474 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 873 transitions. Word has length 20 [2021-03-10 22:05:16,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:16,475 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 873 transitions. [2021-03-10 22:05:16,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:16,475 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 873 transitions. [2021-03-10 22:05:16,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:16,475 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:16,475 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:16,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4520,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:16,675 INFO L428 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:16,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:16,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1330047559, now seen corresponding path program 491 times [2021-03-10 22:05:16,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:16,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021604024] [2021-03-10 22:05:16,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:16,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021604024] [2021-03-10 22:05:16,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170054970] [2021-03-10 22:05:16,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:16,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:05:16,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:16,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:05:16,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:16,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:05:16,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:05:16,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:05:16,943 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:05:16,946 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:05:16,949 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:05:16,952 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:05:16,955 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,986 INFO L628 ElimStorePlain]: treesize reduction 47, result has 37.3 percent of original size [2021-03-10 22:05:16,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:05:16,987 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:142, output treesize:28 [2021-03-10 22:05:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:17,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:17,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 22:05:17,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528651786] [2021-03-10 22:05:17,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:05:17,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:17,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:05:17,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:05:17,053 INFO L87 Difference]: Start difference. First operand 295 states and 873 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:17,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:17,419 INFO L93 Difference]: Finished difference Result 504 states and 1434 transitions. [2021-03-10 22:05:17,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:17,419 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:17,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:17,420 INFO L225 Difference]: With dead ends: 504 [2021-03-10 22:05:17,420 INFO L226 Difference]: Without dead ends: 498 [2021-03-10 22:05:17,420 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 351.6ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:05:17,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-03-10 22:05:17,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 309. [2021-03-10 22:05:17,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.961038961038961) internal successors, (912), 308 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 912 transitions. [2021-03-10 22:05:17,423 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 912 transitions. Word has length 20 [2021-03-10 22:05:17,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:17,424 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 912 transitions. [2021-03-10 22:05:17,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:17,424 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 912 transitions. [2021-03-10 22:05:17,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:17,424 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:17,424 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:17,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4527 [2021-03-10 22:05:17,624 INFO L428 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:17,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:17,625 INFO L82 PathProgramCache]: Analyzing trace with hash -585376367, now seen corresponding path program 492 times [2021-03-10 22:05:17,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:17,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69236062] [2021-03-10 22:05:17,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:17,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69236062] [2021-03-10 22:05:17,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774217142] [2021-03-10 22:05:17,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:17,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:05:17,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:17,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:05:17,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:17,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:05:17,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:17,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:05:17,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:17,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:05:17,905 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:17,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:05:17,908 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:17,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:05:17,911 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:17,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:05:17,914 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:17,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:05:17,918 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:17,950 INFO L628 ElimStorePlain]: treesize reduction 47, result has 37.3 percent of original size [2021-03-10 22:05:17,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:05:17,951 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:142, output treesize:28 [2021-03-10 22:05:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:18,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:18,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 22:05:18,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917876998] [2021-03-10 22:05:18,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:05:18,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:18,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:05:18,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:05:18,021 INFO L87 Difference]: Start difference. First operand 309 states and 912 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:18,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:18,400 INFO L93 Difference]: Finished difference Result 510 states and 1455 transitions. [2021-03-10 22:05:18,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:18,400 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:18,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:18,401 INFO L225 Difference]: With dead ends: 510 [2021-03-10 22:05:18,401 INFO L226 Difference]: Without dead ends: 510 [2021-03-10 22:05:18,401 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 398.4ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:05:18,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-03-10 22:05:18,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 307. [2021-03-10 22:05:18,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9640522875816995) internal successors, (907), 306 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:18,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2021-03-10 22:05:18,404 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2021-03-10 22:05:18,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:18,404 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2021-03-10 22:05:18,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:18,405 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2021-03-10 22:05:18,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:18,405 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:18,405 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:18,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4536 [2021-03-10 22:05:18,605 INFO L428 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:18,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:18,606 INFO L82 PathProgramCache]: Analyzing trace with hash 454859431, now seen corresponding path program 493 times [2021-03-10 22:05:18,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:18,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576415359] [2021-03-10 22:05:18,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:18,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:18,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576415359] [2021-03-10 22:05:18,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006211326] [2021-03-10 22:05:18,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:18,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:18,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:18,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:18,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:18,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345432041] [2021-03-10 22:05:18,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:18,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:18,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:18,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:18,893 INFO L87 Difference]: Start difference. First operand 307 states and 907 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:19,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:19,113 INFO L93 Difference]: Finished difference Result 479 states and 1390 transitions. [2021-03-10 22:05:19,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:19,114 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:19,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:19,114 INFO L225 Difference]: With dead ends: 479 [2021-03-10 22:05:19,114 INFO L226 Difference]: Without dead ends: 479 [2021-03-10 22:05:19,114 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 252.1ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:19,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-03-10 22:05:19,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 294. [2021-03-10 22:05:19,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:19,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-03-10 22:05:19,118 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-03-10 22:05:19,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:19,118 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-03-10 22:05:19,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:19,118 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-03-10 22:05:19,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:19,118 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:19,118 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:19,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4544,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:19,333 INFO L428 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:19,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:19,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2054608897, now seen corresponding path program 494 times [2021-03-10 22:05:19,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:19,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877895272] [2021-03-10 22:05:19,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:19,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877895272] [2021-03-10 22:05:19,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990563166] [2021-03-10 22:05:19,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:19,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:19,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:19,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:19,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:19,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:19,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:19,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725991874] [2021-03-10 22:05:19,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:19,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:19,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:19,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:19,616 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:19,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:19,828 INFO L93 Difference]: Finished difference Result 451 states and 1306 transitions. [2021-03-10 22:05:19,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:19,828 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:19,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:19,828 INFO L225 Difference]: With dead ends: 451 [2021-03-10 22:05:19,828 INFO L226 Difference]: Without dead ends: 439 [2021-03-10 22:05:19,829 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 245.9ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:19,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-03-10 22:05:19,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 298. [2021-03-10 22:05:19,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.95959595959596) internal successors, (879), 297 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:19,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 879 transitions. [2021-03-10 22:05:19,832 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 879 transitions. Word has length 20 [2021-03-10 22:05:19,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:19,832 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 879 transitions. [2021-03-10 22:05:19,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:19,832 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 879 transitions. [2021-03-10 22:05:19,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:19,832 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:19,832 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:20,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4550 [2021-03-10 22:05:20,033 INFO L428 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:20,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:20,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1488957961, now seen corresponding path program 495 times [2021-03-10 22:05:20,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:20,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984958374] [2021-03-10 22:05:20,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:20,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984958374] [2021-03-10 22:05:20,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446471570] [2021-03-10 22:05:20,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:20,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:05:20,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:20,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:20,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:20,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:20,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:20,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:20,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876726764] [2021-03-10 22:05:20,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:20,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:20,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:20,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:20,314 INFO L87 Difference]: Start difference. First operand 298 states and 879 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:20,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:20,581 INFO L93 Difference]: Finished difference Result 476 states and 1358 transitions. [2021-03-10 22:05:20,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:20,582 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:20,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:20,582 INFO L225 Difference]: With dead ends: 476 [2021-03-10 22:05:20,582 INFO L226 Difference]: Without dead ends: 470 [2021-03-10 22:05:20,582 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 290.6ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:20,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-03-10 22:05:20,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 308. [2021-03-10 22:05:20,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.95114006514658) internal successors, (906), 307 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:20,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 906 transitions. [2021-03-10 22:05:20,589 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 906 transitions. Word has length 20 [2021-03-10 22:05:20,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:20,589 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 906 transitions. [2021-03-10 22:05:20,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:20,589 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 906 transitions. [2021-03-10 22:05:20,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:20,590 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:20,590 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:20,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4558,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:20,790 INFO L428 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:20,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:20,790 INFO L82 PathProgramCache]: Analyzing trace with hash 890585409, now seen corresponding path program 496 times [2021-03-10 22:05:20,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:20,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319866700] [2021-03-10 22:05:20,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:20,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319866700] [2021-03-10 22:05:20,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146134866] [2021-03-10 22:05:20,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:20,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:20,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:20,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:20,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:21,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:21,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:21,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088564739] [2021-03-10 22:05:21,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:21,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:21,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:21,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:21,072 INFO L87 Difference]: Start difference. First operand 308 states and 906 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:21,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:21,270 INFO L93 Difference]: Finished difference Result 447 states and 1304 transitions. [2021-03-10 22:05:21,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:21,271 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:21,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:21,271 INFO L225 Difference]: With dead ends: 447 [2021-03-10 22:05:21,271 INFO L226 Difference]: Without dead ends: 447 [2021-03-10 22:05:21,271 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 221.8ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:21,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-03-10 22:05:21,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 296. [2021-03-10 22:05:21,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.9627118644067796) internal successors, (874), 295 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:21,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 874 transitions. [2021-03-10 22:05:21,274 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 874 transitions. Word has length 20 [2021-03-10 22:05:21,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:21,275 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 874 transitions. [2021-03-10 22:05:21,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:21,275 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 874 transitions. [2021-03-10 22:05:21,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:21,275 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:21,275 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:21,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4566,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:21,475 INFO L428 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:21,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:21,476 INFO L82 PathProgramCache]: Analyzing trace with hash 693580705, now seen corresponding path program 497 times [2021-03-10 22:05:21,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:21,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744095628] [2021-03-10 22:05:21,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:21,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744095628] [2021-03-10 22:05:21,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793130945] [2021-03-10 22:05:21,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:21,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:05:21,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:21,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:05:21,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:21,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:05:21,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:21,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:05:21,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:21,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:05:21,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:21,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:05:21,731 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:21,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:05:21,734 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:21,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:05:21,737 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:21,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:05:21,740 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:21,773 INFO L628 ElimStorePlain]: treesize reduction 47, result has 37.3 percent of original size [2021-03-10 22:05:21,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:05:21,774 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:142, output treesize:28 [2021-03-10 22:05:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:21,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:21,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:05:21,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161358468] [2021-03-10 22:05:21,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:05:21,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:21,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:05:21,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:21,841 INFO L87 Difference]: Start difference. First operand 296 states and 874 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:22,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:22,155 INFO L93 Difference]: Finished difference Result 482 states and 1373 transitions. [2021-03-10 22:05:22,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:22,155 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:22,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:22,156 INFO L225 Difference]: With dead ends: 482 [2021-03-10 22:05:22,156 INFO L226 Difference]: Without dead ends: 476 [2021-03-10 22:05:22,156 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 309.5ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:22,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-03-10 22:05:22,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 310. [2021-03-10 22:05:22,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.954692556634304) internal successors, (913), 309 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:22,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 913 transitions. [2021-03-10 22:05:22,160 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 913 transitions. Word has length 20 [2021-03-10 22:05:22,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:22,160 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 913 transitions. [2021-03-10 22:05:22,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:22,160 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 913 transitions. [2021-03-10 22:05:22,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:22,160 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:22,160 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:22,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4572 [2021-03-10 22:05:22,361 INFO L428 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:22,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:22,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1221843221, now seen corresponding path program 498 times [2021-03-10 22:05:22,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:22,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183799706] [2021-03-10 22:05:22,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:22,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183799706] [2021-03-10 22:05:22,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248795283] [2021-03-10 22:05:22,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:22,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:05:22,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:22,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:05:22,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:22,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:05:22,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:05:22,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:05:22,616 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:05:22,619 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:05:22,623 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:05:22,626 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:05:22,629 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,662 INFO L628 ElimStorePlain]: treesize reduction 47, result has 37.3 percent of original size [2021-03-10 22:05:22,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:05:22,663 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:142, output treesize:28 [2021-03-10 22:05:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:22,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:22,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:05:22,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613233014] [2021-03-10 22:05:22,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:05:22,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:22,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:05:22,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:22,745 INFO L87 Difference]: Start difference. First operand 310 states and 913 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:23,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:23,094 INFO L93 Difference]: Finished difference Result 482 states and 1379 transitions. [2021-03-10 22:05:23,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:23,095 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:23,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:23,096 INFO L225 Difference]: With dead ends: 482 [2021-03-10 22:05:23,096 INFO L226 Difference]: Without dead ends: 482 [2021-03-10 22:05:23,096 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 351.7ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:05:23,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-03-10 22:05:23,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 308. [2021-03-10 22:05:23,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.957654723127036) internal successors, (908), 307 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:23,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 908 transitions. [2021-03-10 22:05:23,099 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 908 transitions. Word has length 20 [2021-03-10 22:05:23,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:23,099 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 908 transitions. [2021-03-10 22:05:23,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:23,099 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 908 transitions. [2021-03-10 22:05:23,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:23,100 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:23,100 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:23,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4579,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:23,300 INFO L428 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:23,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:23,300 INFO L82 PathProgramCache]: Analyzing trace with hash -181607423, now seen corresponding path program 499 times [2021-03-10 22:05:23,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:23,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341869119] [2021-03-10 22:05:23,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:23,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341869119] [2021-03-10 22:05:23,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720262485] [2021-03-10 22:05:23,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:23,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:23,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:23,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:23,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:05:23,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674521454] [2021-03-10 22:05:23,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:05:23,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:23,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:05:23,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:05:23,560 INFO L87 Difference]: Start difference. First operand 308 states and 908 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:23,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:23,744 INFO L93 Difference]: Finished difference Result 457 states and 1329 transitions. [2021-03-10 22:05:23,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:23,745 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:23,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:23,745 INFO L225 Difference]: With dead ends: 457 [2021-03-10 22:05:23,745 INFO L226 Difference]: Without dead ends: 457 [2021-03-10 22:05:23,745 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:05:23,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-03-10 22:05:23,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 293. [2021-03-10 22:05:23,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.962328767123288) internal successors, (865), 292 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:23,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-03-10 22:05:23,749 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-03-10 22:05:23,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:23,749 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-03-10 22:05:23,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:23,749 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-03-10 22:05:23,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:23,749 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:23,749 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:23,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4585 [2021-03-10 22:05:23,950 INFO L428 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:23,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:23,950 INFO L82 PathProgramCache]: Analyzing trace with hash -2140630069, now seen corresponding path program 500 times [2021-03-10 22:05:23,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:23,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781451353] [2021-03-10 22:05:23,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:24,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:24,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781451353] [2021-03-10 22:05:24,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800953698] [2021-03-10 22:05:24,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:24,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:24,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:24,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:24,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:24,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:24,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:05:24,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639723811] [2021-03-10 22:05:24,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:05:24,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:24,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:05:24,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:05:24,201 INFO L87 Difference]: Start difference. First operand 293 states and 865 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:24,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:24,488 INFO L93 Difference]: Finished difference Result 529 states and 1491 transitions. [2021-03-10 22:05:24,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:24,488 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:24,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:24,489 INFO L225 Difference]: With dead ends: 529 [2021-03-10 22:05:24,489 INFO L226 Difference]: Without dead ends: 511 [2021-03-10 22:05:24,489 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 281.6ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:24,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-03-10 22:05:24,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 297. [2021-03-10 22:05:24,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.956081081081081) internal successors, (875), 296 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2021-03-10 22:05:24,493 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2021-03-10 22:05:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:24,493 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2021-03-10 22:05:24,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:24,493 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2021-03-10 22:05:24,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:24,493 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:24,493 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:24,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4587,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:24,694 INFO L428 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:24,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:24,694 INFO L82 PathProgramCache]: Analyzing trace with hash -128273967, now seen corresponding path program 501 times [2021-03-10 22:05:24,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:24,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910195307] [2021-03-10 22:05:24,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:24,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910195307] [2021-03-10 22:05:24,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999315617] [2021-03-10 22:05:24,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:24,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:05:24,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:24,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:24,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:24,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:24,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:24,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256713535] [2021-03-10 22:05:24,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:24,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:24,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:24,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:24,974 INFO L87 Difference]: Start difference. First operand 297 states and 875 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:25,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:25,264 INFO L93 Difference]: Finished difference Result 525 states and 1483 transitions. [2021-03-10 22:05:25,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:25,265 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:25,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:25,265 INFO L225 Difference]: With dead ends: 525 [2021-03-10 22:05:25,266 INFO L226 Difference]: Without dead ends: 513 [2021-03-10 22:05:25,266 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 295.8ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:25,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-03-10 22:05:25,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 299. [2021-03-10 22:05:25,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.953020134228188) internal successors, (880), 298 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:25,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2021-03-10 22:05:25,269 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2021-03-10 22:05:25,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:25,269 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2021-03-10 22:05:25,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:25,269 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2021-03-10 22:05:25,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:25,270 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:25,270 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:25,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 504 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4592 [2021-03-10 22:05:25,470 INFO L428 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:25,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:25,470 INFO L82 PathProgramCache]: Analyzing trace with hash 623126471, now seen corresponding path program 502 times [2021-03-10 22:05:25,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:25,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945181475] [2021-03-10 22:05:25,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:25,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945181475] [2021-03-10 22:05:25,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054001844] [2021-03-10 22:05:25,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:25,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:25,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:25,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:25,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:25,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:25,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:25,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:25,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698500940] [2021-03-10 22:05:25,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:25,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:25,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:25,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:25,750 INFO L87 Difference]: Start difference. First operand 299 states and 880 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:26,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:26,145 INFO L93 Difference]: Finished difference Result 550 states and 1535 transitions. [2021-03-10 22:05:26,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:26,146 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:26,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:26,147 INFO L225 Difference]: With dead ends: 550 [2021-03-10 22:05:26,147 INFO L226 Difference]: Without dead ends: 544 [2021-03-10 22:05:26,147 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 385.0ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:05:26,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-03-10 22:05:26,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 309. [2021-03-10 22:05:26,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:26,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2021-03-10 22:05:26,151 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2021-03-10 22:05:26,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:26,151 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2021-03-10 22:05:26,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:26,151 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2021-03-10 22:05:26,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:26,151 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:26,151 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:26,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4597,505 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:26,351 INFO L428 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:26,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:26,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1292297455, now seen corresponding path program 503 times [2021-03-10 22:05:26,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:26,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002218658] [2021-03-10 22:05:26,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:26,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002218658] [2021-03-10 22:05:26,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312789938] [2021-03-10 22:05:26,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:26,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:05:26,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:26,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:26,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:26,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:26,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:26,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:26,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194673441] [2021-03-10 22:05:26,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:26,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:26,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:26,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:26,634 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:26,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:26,891 INFO L93 Difference]: Finished difference Result 521 states and 1481 transitions. [2021-03-10 22:05:26,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:26,891 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:26,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:26,892 INFO L225 Difference]: With dead ends: 521 [2021-03-10 22:05:26,892 INFO L226 Difference]: Without dead ends: 521 [2021-03-10 22:05:26,892 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 293.9ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:26,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-03-10 22:05:26,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 295. [2021-03-10 22:05:26,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9591836734693877) internal successors, (870), 294 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:26,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 870 transitions. [2021-03-10 22:05:26,896 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 870 transitions. Word has length 20 [2021-03-10 22:05:26,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:26,896 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 870 transitions. [2021-03-10 22:05:26,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:26,896 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 870 transitions. [2021-03-10 22:05:26,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:26,896 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:26,896 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:27,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4604,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:27,097 INFO L428 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:27,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:27,097 INFO L82 PathProgramCache]: Analyzing trace with hash -764740821, now seen corresponding path program 504 times [2021-03-10 22:05:27,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:27,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530112962] [2021-03-10 22:05:27,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:27,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530112962] [2021-03-10 22:05:27,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125408039] [2021-03-10 22:05:27,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:27,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:05:27,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:27,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:27,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:27,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:27,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:05:27,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603557653] [2021-03-10 22:05:27,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:05:27,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:27,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:05:27,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:05:27,349 INFO L87 Difference]: Start difference. First operand 295 states and 870 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:27,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:27,555 INFO L93 Difference]: Finished difference Result 470 states and 1352 transitions. [2021-03-10 22:05:27,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:27,555 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:27,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:27,556 INFO L225 Difference]: With dead ends: 470 [2021-03-10 22:05:27,556 INFO L226 Difference]: Without dead ends: 458 [2021-03-10 22:05:27,556 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 231.9ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:27,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-03-10 22:05:27,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 299. [2021-03-10 22:05:27,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.953020134228188) internal successors, (880), 298 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:27,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2021-03-10 22:05:27,559 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2021-03-10 22:05:27,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:27,559 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2021-03-10 22:05:27,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:27,559 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2021-03-10 22:05:27,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:27,560 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:27,560 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:27,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4610,507 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:27,760 INFO L428 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:27,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:27,760 INFO L82 PathProgramCache]: Analyzing trace with hash -13340383, now seen corresponding path program 505 times [2021-03-10 22:05:27,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:27,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343564170] [2021-03-10 22:05:27,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:27,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343564170] [2021-03-10 22:05:27,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380422002] [2021-03-10 22:05:27,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:27,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:27,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:28,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:28,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:28,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:05:28,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913532640] [2021-03-10 22:05:28,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:05:28,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:28,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:05:28,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:05:28,023 INFO L87 Difference]: Start difference. First operand 299 states and 880 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:28,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:28,287 INFO L93 Difference]: Finished difference Result 495 states and 1404 transitions. [2021-03-10 22:05:28,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:28,288 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:28,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:28,289 INFO L225 Difference]: With dead ends: 495 [2021-03-10 22:05:28,289 INFO L226 Difference]: Without dead ends: 489 [2021-03-10 22:05:28,289 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 275.8ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:28,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-03-10 22:05:28,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 309. [2021-03-10 22:05:28,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:28,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2021-03-10 22:05:28,296 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2021-03-10 22:05:28,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:28,296 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2021-03-10 22:05:28,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:28,296 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2021-03-10 22:05:28,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:28,296 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:28,296 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:28,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4615,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:28,497 INFO L428 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:28,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:28,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1928764309, now seen corresponding path program 506 times [2021-03-10 22:05:28,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:28,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310791426] [2021-03-10 22:05:28,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:28,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310791426] [2021-03-10 22:05:28,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118322218] [2021-03-10 22:05:28,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:28,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:28,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:28,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:28,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:28,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:28,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:05:28,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619142479] [2021-03-10 22:05:28,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:05:28,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:28,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:05:28,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:05:28,752 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:28,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:28,938 INFO L93 Difference]: Finished difference Result 466 states and 1350 transitions. [2021-03-10 22:05:28,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:28,939 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:28,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:28,939 INFO L225 Difference]: With dead ends: 466 [2021-03-10 22:05:28,939 INFO L226 Difference]: Without dead ends: 466 [2021-03-10 22:05:28,939 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 207.4ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:28,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-03-10 22:05:28,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 297. [2021-03-10 22:05:28,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.956081081081081) internal successors, (875), 296 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:28,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2021-03-10 22:05:28,943 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2021-03-10 22:05:28,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:28,943 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2021-03-10 22:05:28,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:28,943 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2021-03-10 22:05:28,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:28,943 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:28,943 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:29,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4624,509 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:29,151 INFO L428 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:29,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:29,151 INFO L82 PathProgramCache]: Analyzing trace with hash -2125769013, now seen corresponding path program 507 times [2021-03-10 22:05:29,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:29,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388056521] [2021-03-10 22:05:29,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:29,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388056521] [2021-03-10 22:05:29,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617373837] [2021-03-10 22:05:29,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:29,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:05:29,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:29,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:29,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:29,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:29,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:05:29,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684679371] [2021-03-10 22:05:29,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:05:29,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:29,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:05:29,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:05:29,392 INFO L87 Difference]: Start difference. First operand 297 states and 875 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:29,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:29,594 INFO L93 Difference]: Finished difference Result 501 states and 1419 transitions. [2021-03-10 22:05:29,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:29,594 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:29,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:29,595 INFO L225 Difference]: With dead ends: 501 [2021-03-10 22:05:29,595 INFO L226 Difference]: Without dead ends: 495 [2021-03-10 22:05:29,595 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 204.9ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:29,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-03-10 22:05:29,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 311. [2021-03-10 22:05:29,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9483870967741934) internal successors, (914), 310 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:29,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 914 transitions. [2021-03-10 22:05:29,598 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 914 transitions. Word has length 20 [2021-03-10 22:05:29,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:29,598 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 914 transitions. [2021-03-10 22:05:29,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:29,598 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 914 transitions. [2021-03-10 22:05:29,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:29,599 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:29,599 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:29,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4631,510 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:29,799 INFO L428 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:29,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:29,799 INFO L82 PathProgramCache]: Analyzing trace with hash 253774357, now seen corresponding path program 508 times [2021-03-10 22:05:29,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:29,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005527816] [2021-03-10 22:05:29,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:29,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005527816] [2021-03-10 22:05:29,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056169068] [2021-03-10 22:05:29,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:29,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:29,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:29,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:29,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:30,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:30,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:05:30,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791918991] [2021-03-10 22:05:30,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:05:30,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:30,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:05:30,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:05:30,049 INFO L87 Difference]: Start difference. First operand 311 states and 914 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:30,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:30,261 INFO L93 Difference]: Finished difference Result 501 states and 1425 transitions. [2021-03-10 22:05:30,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:30,262 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:30,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:30,262 INFO L225 Difference]: With dead ends: 501 [2021-03-10 22:05:30,262 INFO L226 Difference]: Without dead ends: 501 [2021-03-10 22:05:30,262 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 228.5ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:30,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-03-10 22:05:30,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 309. [2021-03-10 22:05:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9512987012987013) internal successors, (909), 308 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:30,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 909 transitions. [2021-03-10 22:05:30,266 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 909 transitions. Word has length 20 [2021-03-10 22:05:30,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:30,266 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 909 transitions. [2021-03-10 22:05:30,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:30,266 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 909 transitions. [2021-03-10 22:05:30,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:30,266 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:30,266 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:30,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4637,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:30,467 INFO L428 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:30,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:30,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1294010155, now seen corresponding path program 509 times [2021-03-10 22:05:30,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:30,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848097802] [2021-03-10 22:05:30,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:30,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848097802] [2021-03-10 22:05:30,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179246737] [2021-03-10 22:05:30,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:30,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:05:30,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:30,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:05:30,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:30,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:05:30,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:30,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:05:30,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:30,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:05:30,701 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:30,720 INFO L628 ElimStorePlain]: treesize reduction 12, result has 62.5 percent of original size [2021-03-10 22:05:30,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:05:30,721 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:63, output treesize:20 [2021-03-10 22:05:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:30,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:30,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:05:30,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308560848] [2021-03-10 22:05:30,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:30,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:30,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:30,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:30,763 INFO L87 Difference]: Start difference. First operand 309 states and 909 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:31,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:31,011 INFO L93 Difference]: Finished difference Result 476 states and 1375 transitions. [2021-03-10 22:05:31,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:31,012 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:31,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:31,012 INFO L225 Difference]: With dead ends: 476 [2021-03-10 22:05:31,012 INFO L226 Difference]: Without dead ends: 476 [2021-03-10 22:05:31,012 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 228.0ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:31,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-03-10 22:05:31,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 292. [2021-03-10 22:05:31,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9587628865979383) internal successors, (861), 291 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:31,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2021-03-10 22:05:31,018 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2021-03-10 22:05:31,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:31,018 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2021-03-10 22:05:31,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:31,018 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2021-03-10 22:05:31,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:31,018 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:31,018 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:31,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4643 [2021-03-10 22:05:31,221 INFO L428 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:31,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:31,221 INFO L82 PathProgramCache]: Analyzing trace with hash -597379255, now seen corresponding path program 510 times [2021-03-10 22:05:31,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:31,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115917260] [2021-03-10 22:05:31,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:31,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115917260] [2021-03-10 22:05:31,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748474719] [2021-03-10 22:05:31,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:31,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:05:31,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:31,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:31,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:31,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:31,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:31,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165980685] [2021-03-10 22:05:31,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:31,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:31,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:31,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:31,599 INFO L87 Difference]: Start difference. First operand 292 states and 861 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:31,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:31,875 INFO L93 Difference]: Finished difference Result 481 states and 1385 transitions. [2021-03-10 22:05:31,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:31,875 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:31,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:31,876 INFO L225 Difference]: With dead ends: 481 [2021-03-10 22:05:31,876 INFO L226 Difference]: Without dead ends: 481 [2021-03-10 22:05:31,876 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 360.9ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:31,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-03-10 22:05:31,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 301. [2021-03-10 22:05:31,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.986666666666667) internal successors, (896), 300 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:31,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 896 transitions. [2021-03-10 22:05:31,880 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 896 transitions. Word has length 20 [2021-03-10 22:05:31,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:31,880 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 896 transitions. [2021-03-10 22:05:31,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:31,880 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 896 transitions. [2021-03-10 22:05:31,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:31,880 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:31,880 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:32,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4647,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:32,081 INFO L428 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:32,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:32,081 INFO L82 PathProgramCache]: Analyzing trace with hash -2091286977, now seen corresponding path program 511 times [2021-03-10 22:05:32,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:32,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123606081] [2021-03-10 22:05:32,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:32,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123606081] [2021-03-10 22:05:32,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259902487] [2021-03-10 22:05:32,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:32,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:32,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:32,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:32,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:32,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591669394] [2021-03-10 22:05:32,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:32,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:32,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:32,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:32,414 INFO L87 Difference]: Start difference. First operand 301 states and 896 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:32,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:32,766 INFO L93 Difference]: Finished difference Result 487 states and 1392 transitions. [2021-03-10 22:05:32,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:32,766 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:32,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:32,767 INFO L225 Difference]: With dead ends: 487 [2021-03-10 22:05:32,767 INFO L226 Difference]: Without dead ends: 481 [2021-03-10 22:05:32,767 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 406.5ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:32,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-03-10 22:05:32,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 298. [2021-03-10 22:05:32,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9797979797979797) internal successors, (885), 297 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:32,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-03-10 22:05:32,771 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-03-10 22:05:32,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:32,771 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-03-10 22:05:32,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:32,771 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-03-10 22:05:32,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:32,771 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:32,771 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:32,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4654,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:32,971 INFO L428 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:32,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:32,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1553431399, now seen corresponding path program 512 times [2021-03-10 22:05:32,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:32,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118507505] [2021-03-10 22:05:32,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:33,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118507505] [2021-03-10 22:05:33,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211712976] [2021-03-10 22:05:33,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:33,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:33,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:33,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:33,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:33,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:33,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:33,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874976842] [2021-03-10 22:05:33,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:33,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:33,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:33,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:33,344 INFO L87 Difference]: Start difference. First operand 298 states and 885 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:33,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:33,733 INFO L93 Difference]: Finished difference Result 451 states and 1310 transitions. [2021-03-10 22:05:33,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:33,733 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:33,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:33,734 INFO L225 Difference]: With dead ends: 451 [2021-03-10 22:05:33,734 INFO L226 Difference]: Without dead ends: 439 [2021-03-10 22:05:33,734 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 458.1ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:33,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-03-10 22:05:33,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 295. [2021-03-10 22:05:33,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9727891156462585) internal successors, (874), 294 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:33,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-03-10 22:05:33,737 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-03-10 22:05:33,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:33,737 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-03-10 22:05:33,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:33,737 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-03-10 22:05:33,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:33,737 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:33,737 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:33,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4664,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:33,938 INFO L428 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:33,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:33,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1221197843, now seen corresponding path program 513 times [2021-03-10 22:05:33,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:33,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908111381] [2021-03-10 22:05:33,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:34,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908111381] [2021-03-10 22:05:34,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107470440] [2021-03-10 22:05:34,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:34,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:05:34,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:34,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:34,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:34,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:34,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:34,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215121698] [2021-03-10 22:05:34,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:34,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:34,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:34,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:34,267 INFO L87 Difference]: Start difference. First operand 295 states and 874 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:34,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:34,639 INFO L93 Difference]: Finished difference Result 568 states and 1603 transitions. [2021-03-10 22:05:34,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:34,639 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:34,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:34,640 INFO L225 Difference]: With dead ends: 568 [2021-03-10 22:05:34,640 INFO L226 Difference]: Without dead ends: 568 [2021-03-10 22:05:34,640 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 381.4ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:05:34,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-03-10 22:05:34,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 303. [2021-03-10 22:05:34,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.013245033112583) internal successors, (910), 302 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:34,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2021-03-10 22:05:34,644 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2021-03-10 22:05:34,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:34,644 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2021-03-10 22:05:34,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:34,644 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2021-03-10 22:05:34,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:34,644 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:34,644 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:34,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4674,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:34,844 INFO L428 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:34,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:34,845 INFO L82 PathProgramCache]: Analyzing trace with hash -272709879, now seen corresponding path program 514 times [2021-03-10 22:05:34,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:34,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382811779] [2021-03-10 22:05:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:34,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382811779] [2021-03-10 22:05:34,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232051895] [2021-03-10 22:05:34,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:35,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:35,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:35,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:35,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:35,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:35,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:35,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:35,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166111651] [2021-03-10 22:05:35,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:35,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:35,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:35,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:35,210 INFO L87 Difference]: Start difference. First operand 303 states and 910 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:35,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:35,617 INFO L93 Difference]: Finished difference Result 574 states and 1604 transitions. [2021-03-10 22:05:35,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:35,618 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:35,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:35,618 INFO L225 Difference]: With dead ends: 574 [2021-03-10 22:05:35,618 INFO L226 Difference]: Without dead ends: 568 [2021-03-10 22:05:35,618 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 462.3ms TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:05:35,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-03-10 22:05:35,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 306. [2021-03-10 22:05:35,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9901639344262296) internal successors, (912), 305 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:35,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 912 transitions. [2021-03-10 22:05:35,622 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 912 transitions. Word has length 20 [2021-03-10 22:05:35,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:35,622 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 912 transitions. [2021-03-10 22:05:35,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:35,622 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 912 transitions. [2021-03-10 22:05:35,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:35,623 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:35,623 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:35,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4682 [2021-03-10 22:05:35,823 INFO L428 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:35,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:35,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1972598281, now seen corresponding path program 515 times [2021-03-10 22:05:35,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:35,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238287186] [2021-03-10 22:05:35,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:35,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:35,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238287186] [2021-03-10 22:05:35,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211674906] [2021-03-10 22:05:35,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:35,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:05:35,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:35,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:35,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:36,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:36,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:36,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443318791] [2021-03-10 22:05:36,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:36,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:36,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:36,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:36,156 INFO L87 Difference]: Start difference. First operand 306 states and 912 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:36,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:36,401 INFO L93 Difference]: Finished difference Result 536 states and 1524 transitions. [2021-03-10 22:05:36,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:36,401 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:36,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:36,402 INFO L225 Difference]: With dead ends: 536 [2021-03-10 22:05:36,402 INFO L226 Difference]: Without dead ends: 536 [2021-03-10 22:05:36,402 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 264.5ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:36,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-03-10 22:05:36,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 299. [2021-03-10 22:05:36,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.0) internal successors, (894), 298 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:36,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 894 transitions. [2021-03-10 22:05:36,405 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 894 transitions. Word has length 20 [2021-03-10 22:05:36,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:36,405 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 894 transitions. [2021-03-10 22:05:36,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:36,406 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 894 transitions. [2021-03-10 22:05:36,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:36,406 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:36,406 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:36,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 518 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4693 [2021-03-10 22:05:36,606 INFO L428 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:36,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:36,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1030026615, now seen corresponding path program 516 times [2021-03-10 22:05:36,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:36,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122711655] [2021-03-10 22:05:36,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:36,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:36,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122711655] [2021-03-10 22:05:36,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278628096] [2021-03-10 22:05:36,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:36,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:05:36,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:36,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:36,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:36,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:36,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:36,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452090740] [2021-03-10 22:05:36,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:36,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:36,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:36,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:36,978 INFO L87 Difference]: Start difference. First operand 299 states and 894 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:37,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:37,229 INFO L93 Difference]: Finished difference Result 499 states and 1442 transitions. [2021-03-10 22:05:37,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:37,229 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:37,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:37,230 INFO L225 Difference]: With dead ends: 499 [2021-03-10 22:05:37,230 INFO L226 Difference]: Without dead ends: 499 [2021-03-10 22:05:37,230 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 318.6ms TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:37,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-03-10 22:05:37,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 296. [2021-03-10 22:05:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.9796610169491524) internal successors, (879), 295 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:37,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 879 transitions. [2021-03-10 22:05:37,233 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 879 transitions. Word has length 20 [2021-03-10 22:05:37,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:37,233 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 879 transitions. [2021-03-10 22:05:37,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:37,233 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 879 transitions. [2021-03-10 22:05:37,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:37,234 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:37,234 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:37,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4701 [2021-03-10 22:05:37,434 INFO L428 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:37,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:37,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1993334809, now seen corresponding path program 517 times [2021-03-10 22:05:37,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:37,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682979789] [2021-03-10 22:05:37,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:37,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:37,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682979789] [2021-03-10 22:05:37,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040860601] [2021-03-10 22:05:37,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:37,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:37,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:37,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:37,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:37,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149382500] [2021-03-10 22:05:37,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:37,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:37,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:37,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:37,759 INFO L87 Difference]: Start difference. First operand 296 states and 879 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:38,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:38,137 INFO L93 Difference]: Finished difference Result 536 states and 1516 transitions. [2021-03-10 22:05:38,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:38,137 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:38,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:38,138 INFO L225 Difference]: With dead ends: 536 [2021-03-10 22:05:38,138 INFO L226 Difference]: Without dead ends: 530 [2021-03-10 22:05:38,138 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 415.2ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:05:38,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-03-10 22:05:38,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 306. [2021-03-10 22:05:38,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.9704918032786884) internal successors, (906), 305 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:38,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 906 transitions. [2021-03-10 22:05:38,142 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 906 transitions. Word has length 20 [2021-03-10 22:05:38,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:38,142 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 906 transitions. [2021-03-10 22:05:38,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:38,142 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 906 transitions. [2021-03-10 22:05:38,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:38,142 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:38,142 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:38,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4713,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:38,343 INFO L428 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:38,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:38,343 INFO L82 PathProgramCache]: Analyzing trace with hash 77910883, now seen corresponding path program 518 times [2021-03-10 22:05:38,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:38,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735776484] [2021-03-10 22:05:38,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:38,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:38,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735776484] [2021-03-10 22:05:38,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679717451] [2021-03-10 22:05:38,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:38,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:38,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:38,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:38,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:38,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:38,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:38,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:38,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683106760] [2021-03-10 22:05:38,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:38,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:38,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:38,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:38,708 INFO L87 Difference]: Start difference. First operand 306 states and 906 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:39,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:39,110 INFO L93 Difference]: Finished difference Result 513 states and 1477 transitions. [2021-03-10 22:05:39,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:39,111 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:39,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:39,111 INFO L225 Difference]: With dead ends: 513 [2021-03-10 22:05:39,112 INFO L226 Difference]: Without dead ends: 513 [2021-03-10 22:05:39,112 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 429.7ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:05:39,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-03-10 22:05:39,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 295. [2021-03-10 22:05:39,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9727891156462585) internal successors, (874), 294 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:39,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-03-10 22:05:39,115 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-03-10 22:05:39,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:39,115 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-03-10 22:05:39,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:39,115 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-03-10 22:05:39,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:39,116 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:39,116 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:39,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4723,521 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:39,316 INFO L428 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:39,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:39,316 INFO L82 PathProgramCache]: Analyzing trace with hash -25522807, now seen corresponding path program 519 times [2021-03-10 22:05:39,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:39,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899265291] [2021-03-10 22:05:39,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:39,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899265291] [2021-03-10 22:05:39,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421978310] [2021-03-10 22:05:39,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:39,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:05:39,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:39,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:39,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:39,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:39,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:39,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217019060] [2021-03-10 22:05:39,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:39,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:39,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:39,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:39,691 INFO L87 Difference]: Start difference. First operand 295 states and 874 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:39,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:39,992 INFO L93 Difference]: Finished difference Result 453 states and 1314 transitions. [2021-03-10 22:05:39,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:39,992 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:39,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:39,993 INFO L225 Difference]: With dead ends: 453 [2021-03-10 22:05:39,993 INFO L226 Difference]: Without dead ends: 441 [2021-03-10 22:05:39,993 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 409.5ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:39,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-03-10 22:05:39,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 297. [2021-03-10 22:05:39,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9695945945945947) internal successors, (879), 296 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:39,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2021-03-10 22:05:39,996 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 20 [2021-03-10 22:05:39,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:39,996 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2021-03-10 22:05:39,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:39,996 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2021-03-10 22:05:39,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:39,996 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:39,996 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:40,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4737,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:40,197 INFO L428 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:40,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:40,197 INFO L82 PathProgramCache]: Analyzing trace with hash 725877631, now seen corresponding path program 520 times [2021-03-10 22:05:40,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:40,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418823082] [2021-03-10 22:05:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:40,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418823082] [2021-03-10 22:05:40,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040879172] [2021-03-10 22:05:40,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:40,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:40,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:40,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:40,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:40,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:40,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:40,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727139286] [2021-03-10 22:05:40,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:40,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:40,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:40,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:40,540 INFO L87 Difference]: Start difference. First operand 297 states and 879 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:40,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:40,893 INFO L93 Difference]: Finished difference Result 478 states and 1366 transitions. [2021-03-10 22:05:40,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:40,893 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:40,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:40,894 INFO L225 Difference]: With dead ends: 478 [2021-03-10 22:05:40,894 INFO L226 Difference]: Without dead ends: 472 [2021-03-10 22:05:40,894 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 407.1ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:05:40,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-03-10 22:05:40,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 307. [2021-03-10 22:05:40,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9607843137254903) internal successors, (906), 306 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:40,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 906 transitions. [2021-03-10 22:05:40,898 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 906 transitions. Word has length 20 [2021-03-10 22:05:40,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:40,898 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 906 transitions. [2021-03-10 22:05:40,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:40,898 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 906 transitions. [2021-03-10 22:05:40,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:40,898 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:40,898 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:41,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4747,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:41,098 INFO L428 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:41,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:41,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1189546295, now seen corresponding path program 521 times [2021-03-10 22:05:41,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:41,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275782718] [2021-03-10 22:05:41,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:41,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275782718] [2021-03-10 22:05:41,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211580026] [2021-03-10 22:05:41,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:41,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:05:41,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:41,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:41,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:41,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:41,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:41,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589654947] [2021-03-10 22:05:41,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:41,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:41,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:41,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:41,445 INFO L87 Difference]: Start difference. First operand 307 states and 906 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:41,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:41,720 INFO L93 Difference]: Finished difference Result 449 states and 1312 transitions. [2021-03-10 22:05:41,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:41,721 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:41,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:41,721 INFO L225 Difference]: With dead ends: 449 [2021-03-10 22:05:41,721 INFO L226 Difference]: Without dead ends: 449 [2021-03-10 22:05:41,721 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 335.4ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:41,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-03-10 22:05:41,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 294. [2021-03-10 22:05:41,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:41,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-03-10 22:05:41,725 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-03-10 22:05:41,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:41,725 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-03-10 22:05:41,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:41,725 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-03-10 22:05:41,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:41,725 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:41,725 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:41,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4758,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:41,926 INFO L428 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:41,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:41,926 INFO L82 PathProgramCache]: Analyzing trace with hash 160419753, now seen corresponding path program 522 times [2021-03-10 22:05:41,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:41,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576822512] [2021-03-10 22:05:41,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:42,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:42,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576822512] [2021-03-10 22:05:42,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729322558] [2021-03-10 22:05:42,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:42,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:05:42,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:42,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:42,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:42,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:42,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:42,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635991708] [2021-03-10 22:05:42,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:42,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:42,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:42,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:42,255 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:42,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:42,559 INFO L93 Difference]: Finished difference Result 578 states and 1617 transitions. [2021-03-10 22:05:42,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:42,560 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:42,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:42,561 INFO L225 Difference]: With dead ends: 578 [2021-03-10 22:05:42,561 INFO L226 Difference]: Without dead ends: 578 [2021-03-10 22:05:42,561 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 327.9ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:05:42,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-03-10 22:05:42,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 304. [2021-03-10 22:05:42,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.0165016501650164) internal successors, (914), 303 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:42,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 914 transitions. [2021-03-10 22:05:42,565 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 914 transitions. Word has length 20 [2021-03-10 22:05:42,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:42,565 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 914 transitions. [2021-03-10 22:05:42,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:42,565 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 914 transitions. [2021-03-10 22:05:42,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:42,565 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:42,565 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:42,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4770 [2021-03-10 22:05:42,766 INFO L428 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:42,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:42,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1333487969, now seen corresponding path program 523 times [2021-03-10 22:05:42,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:42,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337455149] [2021-03-10 22:05:42,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:42,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:42,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337455149] [2021-03-10 22:05:42,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784833143] [2021-03-10 22:05:42,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:42,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:42,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:43,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:43,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:43,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889956741] [2021-03-10 22:05:43,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:43,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:43,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:43,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:43,098 INFO L87 Difference]: Start difference. First operand 304 states and 914 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:43,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:43,339 INFO L93 Difference]: Finished difference Result 532 states and 1515 transitions. [2021-03-10 22:05:43,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:43,339 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:43,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:43,340 INFO L225 Difference]: With dead ends: 532 [2021-03-10 22:05:43,340 INFO L226 Difference]: Without dead ends: 526 [2021-03-10 22:05:43,340 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 272.9ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:43,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-03-10 22:05:43,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 307. [2021-03-10 22:05:43,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9934640522875817) internal successors, (916), 306 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:43,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-03-10 22:05:43,344 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-03-10 22:05:43,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:43,344 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-03-10 22:05:43,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-03-10 22:05:43,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:43,344 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:43,344 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:43,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4783 [2021-03-10 22:05:43,544 INFO L428 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:43,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:43,545 INFO L82 PathProgramCache]: Analyzing trace with hash 911820191, now seen corresponding path program 524 times [2021-03-10 22:05:43,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:43,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669131013] [2021-03-10 22:05:43,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:43,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669131013] [2021-03-10 22:05:43,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721231145] [2021-03-10 22:05:43,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:43,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:43,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:43,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:43,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:43,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:43,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:43,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71595613] [2021-03-10 22:05:43,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:43,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:43,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:43,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:43,890 INFO L87 Difference]: Start difference. First operand 307 states and 916 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:44,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:44,118 INFO L93 Difference]: Finished difference Result 584 states and 1657 transitions. [2021-03-10 22:05:44,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:44,118 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:44,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:44,119 INFO L225 Difference]: With dead ends: 584 [2021-03-10 22:05:44,119 INFO L226 Difference]: Without dead ends: 584 [2021-03-10 22:05:44,119 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 266.1ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:44,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-03-10 22:05:44,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 310. [2021-03-10 22:05:44,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.01294498381877) internal successors, (931), 309 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 931 transitions. [2021-03-10 22:05:44,123 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 931 transitions. Word has length 20 [2021-03-10 22:05:44,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:44,123 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 931 transitions. [2021-03-10 22:05:44,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:44,123 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 931 transitions. [2021-03-10 22:05:44,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:44,123 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:44,123 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:44,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 527 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4792 [2021-03-10 22:05:44,324 INFO L428 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:44,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:44,324 INFO L82 PathProgramCache]: Analyzing trace with hash -2090804705, now seen corresponding path program 525 times [2021-03-10 22:05:44,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:44,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437603123] [2021-03-10 22:05:44,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:44,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:44,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:44,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437603123] [2021-03-10 22:05:44,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941495141] [2021-03-10 22:05:44,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:44,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:05:44,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:44,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:44,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:44,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:44,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:44,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228100450] [2021-03-10 22:05:44,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:44,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:44,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:44,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:44,651 INFO L87 Difference]: Start difference. First operand 310 states and 931 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:44,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:44,873 INFO L93 Difference]: Finished difference Result 547 states and 1575 transitions. [2021-03-10 22:05:44,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:44,873 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:44,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:44,874 INFO L225 Difference]: With dead ends: 547 [2021-03-10 22:05:44,874 INFO L226 Difference]: Without dead ends: 547 [2021-03-10 22:05:44,874 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 259.9ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:44,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-03-10 22:05:44,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 307. [2021-03-10 22:05:44,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9934640522875817) internal successors, (916), 306 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:44,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-03-10 22:05:44,878 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-03-10 22:05:44,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:44,878 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-03-10 22:05:44,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:44,878 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-03-10 22:05:44,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:44,878 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:44,878 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:45,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4804 [2021-03-10 22:05:45,079 INFO L428 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:45,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:45,079 INFO L82 PathProgramCache]: Analyzing trace with hash 932556719, now seen corresponding path program 526 times [2021-03-10 22:05:45,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:45,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718910608] [2021-03-10 22:05:45,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:45,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718910608] [2021-03-10 22:05:45,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773466066] [2021-03-10 22:05:45,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:45,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:45,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:45,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:45,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:45,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:45,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:45,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940681186] [2021-03-10 22:05:45,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:45,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:45,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:45,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:45,408 INFO L87 Difference]: Start difference. First operand 307 states and 916 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:45,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:45,623 INFO L93 Difference]: Finished difference Result 572 states and 1609 transitions. [2021-03-10 22:05:45,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:45,623 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:45,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:45,624 INFO L225 Difference]: With dead ends: 572 [2021-03-10 22:05:45,624 INFO L226 Difference]: Without dead ends: 566 [2021-03-10 22:05:45,624 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 278.3ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:45,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-03-10 22:05:45,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 311. [2021-03-10 22:05:45,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0) internal successors, (930), 310 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:45,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-03-10 22:05:45,628 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-03-10 22:05:45,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:45,628 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-03-10 22:05:45,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:45,628 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-03-10 22:05:45,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:45,628 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:45,628 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:45,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4813,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:45,828 INFO L428 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:45,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:45,829 INFO L82 PathProgramCache]: Analyzing trace with hash -982867207, now seen corresponding path program 527 times [2021-03-10 22:05:45,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:45,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764225994] [2021-03-10 22:05:45,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:45,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764225994] [2021-03-10 22:05:45,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225780947] [2021-03-10 22:05:45,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:45,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:05:45,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:45,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:45,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:46,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:46,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:46,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287145102] [2021-03-10 22:05:46,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:46,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:46,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:46,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:46,139 INFO L87 Difference]: Start difference. First operand 311 states and 930 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:46,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:46,445 INFO L93 Difference]: Finished difference Result 578 states and 1630 transitions. [2021-03-10 22:05:46,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:46,445 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:46,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:46,446 INFO L225 Difference]: With dead ends: 578 [2021-03-10 22:05:46,446 INFO L226 Difference]: Without dead ends: 578 [2021-03-10 22:05:46,446 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 306.7ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:46,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-03-10 22:05:46,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 308. [2021-03-10 22:05:46,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.996742671009772) internal successors, (920), 307 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:46,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 920 transitions. [2021-03-10 22:05:46,454 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 920 transitions. Word has length 20 [2021-03-10 22:05:46,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:46,454 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 920 transitions. [2021-03-10 22:05:46,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:46,454 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 920 transitions. [2021-03-10 22:05:46,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:46,454 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:46,454 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:46,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4822,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:46,655 INFO L428 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:46,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:46,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1200608439, now seen corresponding path program 528 times [2021-03-10 22:05:46,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:46,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459697359] [2021-03-10 22:05:46,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:46,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459697359] [2021-03-10 22:05:46,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633431507] [2021-03-10 22:05:46,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:46,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:05:46,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:46,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:46,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:46,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:46,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:46,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608855710] [2021-03-10 22:05:46,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:46,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:46,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:46,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:46,993 INFO L87 Difference]: Start difference. First operand 308 states and 920 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:47,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:47,214 INFO L93 Difference]: Finished difference Result 508 states and 1475 transitions. [2021-03-10 22:05:47,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:47,214 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:47,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:47,215 INFO L225 Difference]: With dead ends: 508 [2021-03-10 22:05:47,215 INFO L226 Difference]: Without dead ends: 508 [2021-03-10 22:05:47,215 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:47,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-03-10 22:05:47,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 309. [2021-03-10 22:05:47,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9935064935064934) internal successors, (922), 308 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:47,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 922 transitions. [2021-03-10 22:05:47,219 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 922 transitions. Word has length 20 [2021-03-10 22:05:47,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:47,219 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 922 transitions. [2021-03-10 22:05:47,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:47,219 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 922 transitions. [2021-03-10 22:05:47,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:47,219 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:47,219 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:47,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4835,531 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:47,419 INFO L428 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:47,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:47,420 INFO L82 PathProgramCache]: Analyzing trace with hash 91733961, now seen corresponding path program 529 times [2021-03-10 22:05:47,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:47,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115815265] [2021-03-10 22:05:47,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:47,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115815265] [2021-03-10 22:05:47,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409410779] [2021-03-10 22:05:47,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:47,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:47,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:47,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:47,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:47,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:47,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437641293] [2021-03-10 22:05:47,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:47,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:47,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:47,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:47,806 INFO L87 Difference]: Start difference. First operand 309 states and 922 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:48,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:48,029 INFO L93 Difference]: Finished difference Result 496 states and 1442 transitions. [2021-03-10 22:05:48,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:48,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:48,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:48,030 INFO L225 Difference]: With dead ends: 496 [2021-03-10 22:05:48,030 INFO L226 Difference]: Without dead ends: 496 [2021-03-10 22:05:48,030 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 293.1ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:48,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-03-10 22:05:48,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 298. [2021-03-10 22:05:48,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9797979797979797) internal successors, (885), 297 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:48,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-03-10 22:05:48,038 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-03-10 22:05:48,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:48,038 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-03-10 22:05:48,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:48,038 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-03-10 22:05:48,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:48,038 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:48,038 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:48,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4842,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:48,239 INFO L428 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:48,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:48,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1804131075, now seen corresponding path program 530 times [2021-03-10 22:05:48,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:48,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776175073] [2021-03-10 22:05:48,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:48,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776175073] [2021-03-10 22:05:48,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771328176] [2021-03-10 22:05:48,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:48,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:48,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:48,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:48,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:48,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:48,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:48,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143341776] [2021-03-10 22:05:48,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:48,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:48,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:48,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:48,544 INFO L87 Difference]: Start difference. First operand 298 states and 885 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:48,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:48,761 INFO L93 Difference]: Finished difference Result 451 states and 1320 transitions. [2021-03-10 22:05:48,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:48,762 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:48,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:48,762 INFO L225 Difference]: With dead ends: 451 [2021-03-10 22:05:48,762 INFO L226 Difference]: Without dead ends: 451 [2021-03-10 22:05:48,763 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 240.2ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:48,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-03-10 22:05:48,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 295. [2021-03-10 22:05:48,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9693877551020407) internal successors, (873), 294 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:48,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 873 transitions. [2021-03-10 22:05:48,766 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 873 transitions. Word has length 20 [2021-03-10 22:05:48,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:48,766 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 873 transitions. [2021-03-10 22:05:48,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:48,766 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 873 transitions. [2021-03-10 22:05:48,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:48,766 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:48,766 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:48,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4852,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:48,967 INFO L428 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:48,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:48,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1847638207, now seen corresponding path program 531 times [2021-03-10 22:05:48,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:48,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856560522] [2021-03-10 22:05:48,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:49,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856560522] [2021-03-10 22:05:49,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81012006] [2021-03-10 22:05:49,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:49,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:05:49,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:49,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:49,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:49,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:49,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:49,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:49,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075884165] [2021-03-10 22:05:49,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:49,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:49,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:49,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:49,263 INFO L87 Difference]: Start difference. First operand 295 states and 873 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:49,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:49,486 INFO L93 Difference]: Finished difference Result 496 states and 1414 transitions. [2021-03-10 22:05:49,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:49,486 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:49,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:49,487 INFO L225 Difference]: With dead ends: 496 [2021-03-10 22:05:49,487 INFO L226 Difference]: Without dead ends: 490 [2021-03-10 22:05:49,487 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 251.5ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:49,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-03-10 22:05:49,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 309. [2021-03-10 22:05:49,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.961038961038961) internal successors, (912), 308 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:49,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 912 transitions. [2021-03-10 22:05:49,490 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 912 transitions. Word has length 20 [2021-03-10 22:05:49,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:49,490 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 912 transitions. [2021-03-10 22:05:49,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:49,491 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 912 transitions. [2021-03-10 22:05:49,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:49,491 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:49,491 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:49,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4861,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:49,691 INFO L428 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:49,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:49,691 INFO L82 PathProgramCache]: Analyzing trace with hash -67785719, now seen corresponding path program 532 times [2021-03-10 22:05:49,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:49,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502459677] [2021-03-10 22:05:49,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:49,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502459677] [2021-03-10 22:05:49,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007914025] [2021-03-10 22:05:49,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:49,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:49,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:49,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:49,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:50,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:50,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:50,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:50,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004273881] [2021-03-10 22:05:50,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:50,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:50,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:50,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:50,005 INFO L87 Difference]: Start difference. First operand 309 states and 912 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:50,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:50,243 INFO L93 Difference]: Finished difference Result 502 states and 1435 transitions. [2021-03-10 22:05:50,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:50,244 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:50,244 INFO L225 Difference]: With dead ends: 502 [2021-03-10 22:05:50,244 INFO L226 Difference]: Without dead ends: 502 [2021-03-10 22:05:50,244 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 271.3ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:50,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-03-10 22:05:50,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 307. [2021-03-10 22:05:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.9640522875816995) internal successors, (907), 306 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:50,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2021-03-10 22:05:50,248 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2021-03-10 22:05:50,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:50,248 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2021-03-10 22:05:50,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:50,248 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2021-03-10 22:05:50,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:50,248 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:50,248 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:50,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4870 [2021-03-10 22:05:50,449 INFO L428 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:50,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:50,449 INFO L82 PathProgramCache]: Analyzing trace with hash 972450079, now seen corresponding path program 533 times [2021-03-10 22:05:50,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:50,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929387015] [2021-03-10 22:05:50,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:50,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929387015] [2021-03-10 22:05:50,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330233335] [2021-03-10 22:05:50,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:50,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:05:50,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:50,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:05:50,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:50,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:05:50,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:50,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:05:50,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:50,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:05:50,737 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:50,756 INFO L628 ElimStorePlain]: treesize reduction 12, result has 62.5 percent of original size [2021-03-10 22:05:50,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:05:50,756 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:63, output treesize:20 [2021-03-10 22:05:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:50,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:50,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 22:05:50,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357347295] [2021-03-10 22:05:50,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:05:50,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:50,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:05:50,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:05:50,802 INFO L87 Difference]: Start difference. First operand 307 states and 907 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:51,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:51,099 INFO L93 Difference]: Finished difference Result 471 states and 1370 transitions. [2021-03-10 22:05:51,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:51,099 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:51,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:51,100 INFO L225 Difference]: With dead ends: 471 [2021-03-10 22:05:51,100 INFO L226 Difference]: Without dead ends: 471 [2021-03-10 22:05:51,100 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 312.1ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:05:51,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-03-10 22:05:51,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 294. [2021-03-10 22:05:51,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:51,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-03-10 22:05:51,107 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-03-10 22:05:51,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:51,107 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-03-10 22:05:51,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:51,107 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-03-10 22:05:51,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:51,107 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:51,107 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:51,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4878 [2021-03-10 22:05:51,308 INFO L428 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:51,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:51,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1722767751, now seen corresponding path program 534 times [2021-03-10 22:05:51,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:51,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21299803] [2021-03-10 22:05:51,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:51,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21299803] [2021-03-10 22:05:51,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256043227] [2021-03-10 22:05:51,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:51,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:05:51,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:51,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:51,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:51,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:51,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:51,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915693792] [2021-03-10 22:05:51,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:51,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:51,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:51,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:51,589 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:51,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:51,786 INFO L93 Difference]: Finished difference Result 443 states and 1286 transitions. [2021-03-10 22:05:51,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:51,787 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:51,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:51,787 INFO L225 Difference]: With dead ends: 443 [2021-03-10 22:05:51,787 INFO L226 Difference]: Without dead ends: 431 [2021-03-10 22:05:51,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 245.0ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:51,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-03-10 22:05:51,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 298. [2021-03-10 22:05:51,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.95959595959596) internal successors, (879), 297 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:51,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 879 transitions. [2021-03-10 22:05:51,790 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 879 transitions. Word has length 20 [2021-03-10 22:05:51,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:51,790 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 879 transitions. [2021-03-10 22:05:51,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:51,790 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 879 transitions. [2021-03-10 22:05:51,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:51,791 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:51,791 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:51,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4884,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:51,991 INFO L428 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:51,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:51,991 INFO L82 PathProgramCache]: Analyzing trace with hash -971367313, now seen corresponding path program 535 times [2021-03-10 22:05:51,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:51,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639954796] [2021-03-10 22:05:51,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:52,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639954796] [2021-03-10 22:05:52,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187265577] [2021-03-10 22:05:52,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:52,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:52,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:52,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:52,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:52,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:52,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899477456] [2021-03-10 22:05:52,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:52,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:52,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:52,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:52,285 INFO L87 Difference]: Start difference. First operand 298 states and 879 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:52,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:52,563 INFO L93 Difference]: Finished difference Result 468 states and 1338 transitions. [2021-03-10 22:05:52,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:52,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:52,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:52,565 INFO L225 Difference]: With dead ends: 468 [2021-03-10 22:05:52,565 INFO L226 Difference]: Without dead ends: 462 [2021-03-10 22:05:52,565 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 305.9ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:52,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-03-10 22:05:52,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 308. [2021-03-10 22:05:52,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.95114006514658) internal successors, (906), 307 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:52,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 906 transitions. [2021-03-10 22:05:52,568 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 906 transitions. Word has length 20 [2021-03-10 22:05:52,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:52,568 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 906 transitions. [2021-03-10 22:05:52,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:52,568 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 906 transitions. [2021-03-10 22:05:52,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:52,569 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:52,569 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:52,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4889 [2021-03-10 22:05:52,769 INFO L428 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:52,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:52,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1408176057, now seen corresponding path program 536 times [2021-03-10 22:05:52,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:52,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554559201] [2021-03-10 22:05:52,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:52,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554559201] [2021-03-10 22:05:52,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211158043] [2021-03-10 22:05:52,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:52,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:52,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:52,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:52,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:53,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:53,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:53,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258964116] [2021-03-10 22:05:53,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:53,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:53,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:53,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:53,067 INFO L87 Difference]: Start difference. First operand 308 states and 906 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:53,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:53,291 INFO L93 Difference]: Finished difference Result 439 states and 1284 transitions. [2021-03-10 22:05:53,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:53,292 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:53,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:53,292 INFO L225 Difference]: With dead ends: 439 [2021-03-10 22:05:53,292 INFO L226 Difference]: Without dead ends: 439 [2021-03-10 22:05:53,292 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:53,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-03-10 22:05:53,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 296. [2021-03-10 22:05:53,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.9627118644067796) internal successors, (874), 295 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:53,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 874 transitions. [2021-03-10 22:05:53,296 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 874 transitions. Word has length 20 [2021-03-10 22:05:53,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:53,296 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 874 transitions. [2021-03-10 22:05:53,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:53,296 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 874 transitions. [2021-03-10 22:05:53,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:53,296 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:53,296 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:53,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4895,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:53,497 INFO L428 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:53,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:53,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1211171353, now seen corresponding path program 537 times [2021-03-10 22:05:53,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:53,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103863927] [2021-03-10 22:05:53,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:53,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103863927] [2021-03-10 22:05:53,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108517535] [2021-03-10 22:05:53,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:53,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:05:53,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:53,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:53,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:53,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:53,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:53,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325133150] [2021-03-10 22:05:53,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:53,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:53,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:53,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:53,781 INFO L87 Difference]: Start difference. First operand 296 states and 874 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:53,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:53,964 INFO L93 Difference]: Finished difference Result 474 states and 1353 transitions. [2021-03-10 22:05:53,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:53,964 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:53,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:53,965 INFO L225 Difference]: With dead ends: 474 [2021-03-10 22:05:53,965 INFO L226 Difference]: Without dead ends: 468 [2021-03-10 22:05:53,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 217.1ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:53,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-03-10 22:05:53,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 310. [2021-03-10 22:05:53,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.954692556634304) internal successors, (913), 309 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:53,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 913 transitions. [2021-03-10 22:05:53,969 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 913 transitions. Word has length 20 [2021-03-10 22:05:53,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:53,969 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 913 transitions. [2021-03-10 22:05:53,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:53,969 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 913 transitions. [2021-03-10 22:05:53,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:53,969 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:53,969 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:54,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4900,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:54,169 INFO L428 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:54,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:54,170 INFO L82 PathProgramCache]: Analyzing trace with hash -704252573, now seen corresponding path program 538 times [2021-03-10 22:05:54,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:54,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281618871] [2021-03-10 22:05:54,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:54,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281618871] [2021-03-10 22:05:54,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374318250] [2021-03-10 22:05:54,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:54,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:54,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:54,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:54,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:54,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:54,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:54,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061728826] [2021-03-10 22:05:54,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:54,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:54,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:54,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:54,455 INFO L87 Difference]: Start difference. First operand 310 states and 913 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:54,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:54,648 INFO L93 Difference]: Finished difference Result 474 states and 1359 transitions. [2021-03-10 22:05:54,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:54,648 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:54,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:54,649 INFO L225 Difference]: With dead ends: 474 [2021-03-10 22:05:54,649 INFO L226 Difference]: Without dead ends: 474 [2021-03-10 22:05:54,649 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 234.3ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:54,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-03-10 22:05:54,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 308. [2021-03-10 22:05:54,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.957654723127036) internal successors, (908), 307 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:54,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 908 transitions. [2021-03-10 22:05:54,653 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 908 transitions. Word has length 20 [2021-03-10 22:05:54,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:54,653 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 908 transitions. [2021-03-10 22:05:54,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:54,653 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 908 transitions. [2021-03-10 22:05:54,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:54,653 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:54,653 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:54,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4905 [2021-03-10 22:05:54,853 INFO L428 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:54,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:54,854 INFO L82 PathProgramCache]: Analyzing trace with hash 335983225, now seen corresponding path program 539 times [2021-03-10 22:05:54,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:54,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842124015] [2021-03-10 22:05:54,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:54,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842124015] [2021-03-10 22:05:54,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825708544] [2021-03-10 22:05:54,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:55,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:05:55,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:55,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:05:55,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:55,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:05:55,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:55,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:05:55,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:55,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:05:55,129 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:55,148 INFO L628 ElimStorePlain]: treesize reduction 12, result has 62.5 percent of original size [2021-03-10 22:05:55,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:05:55,149 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:63, output treesize:20 [2021-03-10 22:05:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:55,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:55,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:05:55,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502715234] [2021-03-10 22:05:55,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:05:55,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:55,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:05:55,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:55,195 INFO L87 Difference]: Start difference. First operand 308 states and 908 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:55,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:55,416 INFO L93 Difference]: Finished difference Result 449 states and 1309 transitions. [2021-03-10 22:05:55,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:55,417 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:55,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:55,417 INFO L225 Difference]: With dead ends: 449 [2021-03-10 22:05:55,417 INFO L226 Difference]: Without dead ends: 449 [2021-03-10 22:05:55,418 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 265.1ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:55,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-03-10 22:05:55,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 293. [2021-03-10 22:05:55,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.962328767123288) internal successors, (865), 292 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:55,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-03-10 22:05:55,421 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-03-10 22:05:55,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:55,421 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-03-10 22:05:55,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:55,421 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-03-10 22:05:55,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:55,421 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:55,421 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:55,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4910,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:55,622 INFO L428 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:55,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:55,622 INFO L82 PathProgramCache]: Analyzing trace with hash -645819531, now seen corresponding path program 540 times [2021-03-10 22:05:55,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:55,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485232324] [2021-03-10 22:05:55,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:55,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:55,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485232324] [2021-03-10 22:05:55,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780774157] [2021-03-10 22:05:55,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:55,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:05:55,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:55,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:55,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:55,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:55,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:55,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811107456] [2021-03-10 22:05:55,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:55,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:55,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:55,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:55,951 INFO L87 Difference]: Start difference. First operand 293 states and 865 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:56,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:56,340 INFO L93 Difference]: Finished difference Result 662 states and 1855 transitions. [2021-03-10 22:05:56,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:56,341 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:56,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:56,341 INFO L225 Difference]: With dead ends: 662 [2021-03-10 22:05:56,341 INFO L226 Difference]: Without dead ends: 662 [2021-03-10 22:05:56,341 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 399.0ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:05:56,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-03-10 22:05:56,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 305. [2021-03-10 22:05:56,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.023026315789474) internal successors, (919), 304 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:56,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 919 transitions. [2021-03-10 22:05:56,345 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 919 transitions. Word has length 20 [2021-03-10 22:05:56,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:56,345 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 919 transitions. [2021-03-10 22:05:56,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:56,346 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 919 transitions. [2021-03-10 22:05:56,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:56,346 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:56,346 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:56,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4914 [2021-03-10 22:05:56,546 INFO L428 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:56,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:56,546 INFO L82 PathProgramCache]: Analyzing trace with hash -2139727253, now seen corresponding path program 541 times [2021-03-10 22:05:56,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:56,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856538086] [2021-03-10 22:05:56,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:56,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:56,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856538086] [2021-03-10 22:05:56,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588618734] [2021-03-10 22:05:56,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:56,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:56,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:56,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:56,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:56,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:56,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761366649] [2021-03-10 22:05:56,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:56,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:56,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:56,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:56,857 INFO L87 Difference]: Start difference. First operand 305 states and 919 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:57,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:57,165 INFO L93 Difference]: Finished difference Result 616 states and 1753 transitions. [2021-03-10 22:05:57,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:57,166 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:57,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:57,167 INFO L225 Difference]: With dead ends: 616 [2021-03-10 22:05:57,167 INFO L226 Difference]: Without dead ends: 610 [2021-03-10 22:05:57,167 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 297.5ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:57,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-03-10 22:05:57,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 308. [2021-03-10 22:05:57,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.0) internal successors, (921), 307 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:57,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 921 transitions. [2021-03-10 22:05:57,170 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 921 transitions. Word has length 20 [2021-03-10 22:05:57,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:57,171 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 921 transitions. [2021-03-10 22:05:57,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:57,171 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 921 transitions. [2021-03-10 22:05:57,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:57,171 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:57,171 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:57,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4923,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:57,371 INFO L428 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:57,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:57,372 INFO L82 PathProgramCache]: Analyzing trace with hash 105580907, now seen corresponding path program 542 times [2021-03-10 22:05:57,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:57,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650833039] [2021-03-10 22:05:57,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:57,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:57,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650833039] [2021-03-10 22:05:57,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339197503] [2021-03-10 22:05:57,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:57,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:57,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:57,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:57,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:57,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:57,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:57,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080438069] [2021-03-10 22:05:57,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:57,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:57,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:57,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:57,696 INFO L87 Difference]: Start difference. First operand 308 states and 921 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:57,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:57,990 INFO L93 Difference]: Finished difference Result 668 states and 1895 transitions. [2021-03-10 22:05:57,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:57,991 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:57,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:57,991 INFO L225 Difference]: With dead ends: 668 [2021-03-10 22:05:57,992 INFO L226 Difference]: Without dead ends: 668 [2021-03-10 22:05:57,992 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 286.2ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:57,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-03-10 22:05:57,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 311. [2021-03-10 22:05:57,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.0193548387096776) internal successors, (936), 310 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:57,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 936 transitions. [2021-03-10 22:05:57,996 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 936 transitions. Word has length 20 [2021-03-10 22:05:57,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:57,996 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 936 transitions. [2021-03-10 22:05:57,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:57,996 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 936 transitions. [2021-03-10 22:05:57,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:57,996 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:57,996 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:58,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4934 [2021-03-10 22:05:58,196 INFO L428 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:58,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:58,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1397923307, now seen corresponding path program 543 times [2021-03-10 22:05:58,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:58,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083847777] [2021-03-10 22:05:58,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:58,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083847777] [2021-03-10 22:05:58,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478982808] [2021-03-10 22:05:58,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:58,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:05:58,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:58,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:58,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:58,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:58,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:58,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681588030] [2021-03-10 22:05:58,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:58,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:58,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:58,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:58,541 INFO L87 Difference]: Start difference. First operand 311 states and 936 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:58,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:58,819 INFO L93 Difference]: Finished difference Result 631 states and 1813 transitions. [2021-03-10 22:05:58,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:58,820 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:58,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:58,821 INFO L225 Difference]: With dead ends: 631 [2021-03-10 22:05:58,821 INFO L226 Difference]: Without dead ends: 631 [2021-03-10 22:05:58,821 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 321.3ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:58,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-03-10 22:05:58,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 308. [2021-03-10 22:05:58,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 3.0) internal successors, (921), 307 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:58,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 921 transitions. [2021-03-10 22:05:58,825 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 921 transitions. Word has length 20 [2021-03-10 22:05:58,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:58,825 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 921 transitions. [2021-03-10 22:05:58,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:58,825 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 921 transitions. [2021-03-10 22:05:58,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:58,825 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:58,825 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:59,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4944,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:59,026 INFO L428 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:59,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:59,026 INFO L82 PathProgramCache]: Analyzing trace with hash 126317435, now seen corresponding path program 544 times [2021-03-10 22:05:59,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:59,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112863441] [2021-03-10 22:05:59,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:59,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112863441] [2021-03-10 22:05:59,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350330354] [2021-03-10 22:05:59,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:59,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:59,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:59,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:59,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:59,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:59,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:05:59,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923764419] [2021-03-10 22:05:59,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:59,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:59,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:59,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:59,339 INFO L87 Difference]: Start difference. First operand 308 states and 921 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:59,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:59,616 INFO L93 Difference]: Finished difference Result 656 states and 1847 transitions. [2021-03-10 22:05:59,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:59,617 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:05:59,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:59,618 INFO L225 Difference]: With dead ends: 656 [2021-03-10 22:05:59,618 INFO L226 Difference]: Without dead ends: 650 [2021-03-10 22:05:59,618 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 303.3ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:59,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-03-10 22:05:59,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 312. [2021-03-10 22:05:59,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.0064308681672025) internal successors, (935), 311 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:59,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 935 transitions. [2021-03-10 22:05:59,622 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 935 transitions. Word has length 20 [2021-03-10 22:05:59,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:59,622 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 935 transitions. [2021-03-10 22:05:59,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:59,622 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 935 transitions. [2021-03-10 22:05:59,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:05:59,623 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:59,623 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:59,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4953,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:59,823 INFO L428 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:59,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:59,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1789106491, now seen corresponding path program 545 times [2021-03-10 22:05:59,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:59,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720100066] [2021-03-10 22:05:59,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:59,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720100066] [2021-03-10 22:05:59,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524471329] [2021-03-10 22:05:59,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:59,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:05:59,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:59,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:05:59,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:00,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:00,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:00,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678041383] [2021-03-10 22:06:00,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:00,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:00,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:00,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:00,139 INFO L87 Difference]: Start difference. First operand 312 states and 935 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:00,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:00,545 INFO L93 Difference]: Finished difference Result 662 states and 1868 transitions. [2021-03-10 22:06:00,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:06:00,545 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:00,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:00,546 INFO L225 Difference]: With dead ends: 662 [2021-03-10 22:06:00,546 INFO L226 Difference]: Without dead ends: 662 [2021-03-10 22:06:00,546 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 389.0ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:06:00,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-03-10 22:06:00,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 309. [2021-03-10 22:06:00,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0032467532467533) internal successors, (925), 308 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:00,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2021-03-10 22:06:00,550 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2021-03-10 22:06:00,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:00,551 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2021-03-10 22:06:00,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:00,551 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2021-03-10 22:06:00,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:00,551 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:00,551 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:00,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4963,548 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:00,751 INFO L428 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:00,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:00,752 INFO L82 PathProgramCache]: Analyzing trace with hash -2006847723, now seen corresponding path program 546 times [2021-03-10 22:06:00,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:00,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044570654] [2021-03-10 22:06:00,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:00,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044570654] [2021-03-10 22:06:00,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892635360] [2021-03-10 22:06:00,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:00,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:06:00,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:00,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:00,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:01,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:01,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:01,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624551132] [2021-03-10 22:06:01,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:01,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:01,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:01,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:01,074 INFO L87 Difference]: Start difference. First operand 309 states and 925 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:01,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:01,339 INFO L93 Difference]: Finished difference Result 613 states and 1782 transitions. [2021-03-10 22:06:01,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:01,339 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:01,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:01,340 INFO L225 Difference]: With dead ends: 613 [2021-03-10 22:06:01,340 INFO L226 Difference]: Without dead ends: 613 [2021-03-10 22:06:01,340 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 281.9ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:06:01,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-03-10 22:06:01,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 315. [2021-03-10 22:06:01,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.031847133757962) internal successors, (952), 314 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:01,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 952 transitions. [2021-03-10 22:06:01,344 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 952 transitions. Word has length 20 [2021-03-10 22:06:01,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:01,344 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 952 transitions. [2021-03-10 22:06:01,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:01,344 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 952 transitions. [2021-03-10 22:06:01,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:01,345 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:01,345 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:01,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4973,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:01,545 INFO L428 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:01,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:01,545 INFO L82 PathProgramCache]: Analyzing trace with hash -714505323, now seen corresponding path program 547 times [2021-03-10 22:06:01,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:01,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367887200] [2021-03-10 22:06:01,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:01,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367887200] [2021-03-10 22:06:01,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230806438] [2021-03-10 22:06:01,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:01,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:01,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:01,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:01,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:01,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722797540] [2021-03-10 22:06:01,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:01,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:01,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:01,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:01,914 INFO L87 Difference]: Start difference. First operand 315 states and 952 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:02,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:02,269 INFO L93 Difference]: Finished difference Result 601 states and 1749 transitions. [2021-03-10 22:06:02,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:02,270 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:02,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:02,271 INFO L225 Difference]: With dead ends: 601 [2021-03-10 22:06:02,271 INFO L226 Difference]: Without dead ends: 601 [2021-03-10 22:06:02,271 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 358.5ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:06:02,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-03-10 22:06:02,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 312. [2021-03-10 22:06:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.012861736334405) internal successors, (937), 311 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 937 transitions. [2021-03-10 22:06:02,275 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 937 transitions. Word has length 20 [2021-03-10 22:06:02,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:02,283 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 937 transitions. [2021-03-10 22:06:02,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:02,283 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 937 transitions. [2021-03-10 22:06:02,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:02,283 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:02,283 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:02,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4980 [2021-03-10 22:06:02,485 INFO L428 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:02,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:02,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1684596937, now seen corresponding path program 548 times [2021-03-10 22:06:02,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:02,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385276692] [2021-03-10 22:06:02,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:02,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385276692] [2021-03-10 22:06:02,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811255474] [2021-03-10 22:06:02,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:02,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:02,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:02,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:02,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:02,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:02,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:02,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665075848] [2021-03-10 22:06:02,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:02,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:02,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:02,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:02,836 INFO L87 Difference]: Start difference. First operand 312 states and 937 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:03,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:03,135 INFO L93 Difference]: Finished difference Result 556 states and 1627 transitions. [2021-03-10 22:06:03,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:03,135 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:03,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:03,136 INFO L225 Difference]: With dead ends: 556 [2021-03-10 22:06:03,136 INFO L226 Difference]: Without dead ends: 556 [2021-03-10 22:06:03,136 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 321.6ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:06:03,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-03-10 22:06:03,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 309. [2021-03-10 22:06:03,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.0032467532467533) internal successors, (925), 308 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:03,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2021-03-10 22:06:03,140 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2021-03-10 22:06:03,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:03,140 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2021-03-10 22:06:03,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:03,140 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2021-03-10 22:06:03,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:03,140 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:03,140 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:03,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4987,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:03,340 INFO L428 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:03,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:03,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1041398923, now seen corresponding path program 549 times [2021-03-10 22:06:03,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:03,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382256400] [2021-03-10 22:06:03,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:03,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382256400] [2021-03-10 22:06:03,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451320571] [2021-03-10 22:06:03,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:03,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:06:03,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:03,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:06:03,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:03,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:03,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:03,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:06:03,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:03,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:03,635 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:03,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:06:03,638 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:03,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:03,642 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:03,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:06:03,645 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:03,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:03,648 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:03,682 INFO L628 ElimStorePlain]: treesize reduction 47, result has 37.3 percent of original size [2021-03-10 22:06:03,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:03,683 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:142, output treesize:28 [2021-03-10 22:06:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:03,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:03,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 22:06:03,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054530661] [2021-03-10 22:06:03,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:06:03,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:03,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:06:03,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:06:03,759 INFO L87 Difference]: Start difference. First operand 309 states and 925 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:04,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:04,192 INFO L93 Difference]: Finished difference Result 595 states and 1706 transitions. [2021-03-10 22:06:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:04,193 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:04,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:04,193 INFO L225 Difference]: With dead ends: 595 [2021-03-10 22:06:04,193 INFO L226 Difference]: Without dead ends: 589 [2021-03-10 22:06:04,194 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 440.9ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:06:04,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-03-10 22:06:04,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 317. [2021-03-10 22:06:04,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 3.009493670886076) internal successors, (951), 316 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:04,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 951 transitions. [2021-03-10 22:06:04,197 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 951 transitions. Word has length 20 [2021-03-10 22:06:04,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:04,197 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 951 transitions. [2021-03-10 22:06:04,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:04,198 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 951 transitions. [2021-03-10 22:06:04,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:04,198 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:04,198 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:04,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4995,552 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:04,398 INFO L428 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:04,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:04,398 INFO L82 PathProgramCache]: Analyzing trace with hash -874025003, now seen corresponding path program 550 times [2021-03-10 22:06:04,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:04,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603743504] [2021-03-10 22:06:04,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:04,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603743504] [2021-03-10 22:06:04,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246813067] [2021-03-10 22:06:04,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:04,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:04,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:04,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:04,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:04,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:04,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:04,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846328652] [2021-03-10 22:06:04,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:04,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:04,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:04,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:04,726 INFO L87 Difference]: Start difference. First operand 317 states and 951 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:05,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:05,028 INFO L93 Difference]: Finished difference Result 601 states and 1727 transitions. [2021-03-10 22:06:05,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:06:05,029 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:05,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:05,029 INFO L225 Difference]: With dead ends: 601 [2021-03-10 22:06:05,029 INFO L226 Difference]: Without dead ends: 601 [2021-03-10 22:06:05,029 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 348.6ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:06:05,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-03-10 22:06:05,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 313. [2021-03-10 22:06:05,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.003205128205128) internal successors, (937), 312 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:05,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 937 transitions. [2021-03-10 22:06:05,033 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 937 transitions. Word has length 20 [2021-03-10 22:06:05,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:05,033 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 937 transitions. [2021-03-10 22:06:05,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:05,033 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 937 transitions. [2021-03-10 22:06:05,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:05,034 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:05,034 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:05,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5006,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:05,234 INFO L428 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:05,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:05,234 INFO L82 PathProgramCache]: Analyzing trace with hash 166210795, now seen corresponding path program 551 times [2021-03-10 22:06:05,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:05,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128880872] [2021-03-10 22:06:05,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:05,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128880872] [2021-03-10 22:06:05,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341600597] [2021-03-10 22:06:05,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:05,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:06:05,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:05,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:06:05,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:05,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:06:05,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:05,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:05,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:05,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:05,522 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:05,541 INFO L628 ElimStorePlain]: treesize reduction 12, result has 62.5 percent of original size [2021-03-10 22:06:05,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:06:05,542 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:63, output treesize:20 [2021-03-10 22:06:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:05,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:05,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 22:06:05,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875475898] [2021-03-10 22:06:05,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:06:05,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:05,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:06:05,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:06:05,589 INFO L87 Difference]: Start difference. First operand 313 states and 937 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:05,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:05,982 INFO L93 Difference]: Finished difference Result 576 states and 1677 transitions. [2021-03-10 22:06:05,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:05,983 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:05,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:05,983 INFO L225 Difference]: With dead ends: 576 [2021-03-10 22:06:05,983 INFO L226 Difference]: Without dead ends: 576 [2021-03-10 22:06:05,983 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 392.7ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:06:05,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-03-10 22:06:05,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 310. [2021-03-10 22:06:05,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 3.0032362459546924) internal successors, (928), 309 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:05,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 928 transitions. [2021-03-10 22:06:05,987 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 928 transitions. Word has length 20 [2021-03-10 22:06:05,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:05,987 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 928 transitions. [2021-03-10 22:06:05,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:05,987 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 928 transitions. [2021-03-10 22:06:05,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:05,988 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:05,988 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:06,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5015,554 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:06,188 INFO L428 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:06,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:06,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1015185865, now seen corresponding path program 552 times [2021-03-10 22:06:06,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:06,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208456650] [2021-03-10 22:06:06,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:06,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208456650] [2021-03-10 22:06:06,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609145914] [2021-03-10 22:06:06,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:06,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:06:06,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:06,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:06,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:06,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:06,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:06,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:06,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280125720] [2021-03-10 22:06:06,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:06,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:06,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:06,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:06,526 INFO L87 Difference]: Start difference. First operand 310 states and 928 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:06,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:06,797 INFO L93 Difference]: Finished difference Result 600 states and 1738 transitions. [2021-03-10 22:06:06,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:06,797 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:06,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:06,798 INFO L225 Difference]: With dead ends: 600 [2021-03-10 22:06:06,798 INFO L226 Difference]: Without dead ends: 600 [2021-03-10 22:06:06,798 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 276.8ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:06:06,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-03-10 22:06:06,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 313. [2021-03-10 22:06:06,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.003205128205128) internal successors, (937), 312 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 937 transitions. [2021-03-10 22:06:06,802 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 937 transitions. Word has length 20 [2021-03-10 22:06:06,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:06,802 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 937 transitions. [2021-03-10 22:06:06,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:06,802 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 937 transitions. [2021-03-10 22:06:06,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:06,802 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:06,802 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:07,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5021,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:07,003 INFO L428 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:07,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:07,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1987439031, now seen corresponding path program 553 times [2021-03-10 22:06:07,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:07,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110830468] [2021-03-10 22:06:07,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:07,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:07,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110830468] [2021-03-10 22:06:07,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735828129] [2021-03-10 22:06:07,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:07,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:07,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:07,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:07,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:07,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:07,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460366887] [2021-03-10 22:06:07,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:07,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:07,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:07,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:07,329 INFO L87 Difference]: Start difference. First operand 313 states and 937 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:07,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:07,584 INFO L93 Difference]: Finished difference Result 602 states and 1742 transitions. [2021-03-10 22:06:07,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:07,584 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:07,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:07,585 INFO L225 Difference]: With dead ends: 602 [2021-03-10 22:06:07,585 INFO L226 Difference]: Without dead ends: 602 [2021-03-10 22:06:07,585 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 285.5ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:06:07,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-03-10 22:06:07,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 310. [2021-03-10 22:06:07,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.983818770226537) internal successors, (922), 309 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:07,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 922 transitions. [2021-03-10 22:06:07,589 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 922 transitions. Word has length 20 [2021-03-10 22:06:07,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:07,589 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 922 transitions. [2021-03-10 22:06:07,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:07,589 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 922 transitions. [2021-03-10 22:06:07,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:07,589 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:07,589 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:07,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5028,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:07,790 INFO L428 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:07,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:07,790 INFO L82 PathProgramCache]: Analyzing trace with hash 411663229, now seen corresponding path program 554 times [2021-03-10 22:06:07,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:07,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888920912] [2021-03-10 22:06:07,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:07,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888920912] [2021-03-10 22:06:07,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849034779] [2021-03-10 22:06:07,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:07,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:07,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:07,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:07,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:08,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:08,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 22:06:08,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322603489] [2021-03-10 22:06:08,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:08,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:08,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:08,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:08,092 INFO L87 Difference]: Start difference. First operand 310 states and 922 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:08,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:08,381 INFO L93 Difference]: Finished difference Result 547 states and 1591 transitions. [2021-03-10 22:06:08,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:08,381 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:08,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:08,382 INFO L225 Difference]: With dead ends: 547 [2021-03-10 22:06:08,382 INFO L226 Difference]: Without dead ends: 547 [2021-03-10 22:06:08,382 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 256.7ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:06:08,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-03-10 22:06:08,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 297. [2021-03-10 22:06:08,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9763513513513513) internal successors, (881), 296 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:08,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 881 transitions. [2021-03-10 22:06:08,386 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 881 transitions. Word has length 20 [2021-03-10 22:06:08,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:08,386 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 881 transitions. [2021-03-10 22:06:08,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:08,386 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 881 transitions. [2021-03-10 22:06:08,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:08,386 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:08,386 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:08,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5035,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:08,586 INFO L428 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:08,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:08,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1672499755, now seen corresponding path program 555 times [2021-03-10 22:06:08,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:08,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678217940] [2021-03-10 22:06:08,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:08,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678217940] [2021-03-10 22:06:08,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000452479] [2021-03-10 22:06:08,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:08,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:06:08,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:08,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:08,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:08,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:08,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:06:08,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571183859] [2021-03-10 22:06:08,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:06:08,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:08,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:06:08,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:06:08,889 INFO L87 Difference]: Start difference. First operand 297 states and 881 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:09,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:09,148 INFO L93 Difference]: Finished difference Result 570 states and 1633 transitions. [2021-03-10 22:06:09,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:09,149 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:09,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:09,149 INFO L225 Difference]: With dead ends: 570 [2021-03-10 22:06:09,149 INFO L226 Difference]: Without dead ends: 570 [2021-03-10 22:06:09,149 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 299.6ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:06:09,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-03-10 22:06:09,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 294. [2021-03-10 22:06:09,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:09,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-03-10 22:06:09,153 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-03-10 22:06:09,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:09,153 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-03-10 22:06:09,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:09,153 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-03-10 22:06:09,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:09,153 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:09,153 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:09,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 558 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5040 [2021-03-10 22:06:09,354 INFO L428 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:09,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:09,354 INFO L82 PathProgramCache]: Analyzing trace with hash -868001639, now seen corresponding path program 556 times [2021-03-10 22:06:09,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:09,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516311691] [2021-03-10 22:06:09,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:09,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516311691] [2021-03-10 22:06:09,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929596472] [2021-03-10 22:06:09,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:09,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:09,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:09,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:09,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:09,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:09,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:09,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:06:09,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361670134] [2021-03-10 22:06:09,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:06:09,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:09,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:06:09,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:06:09,636 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:09,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:09,923 INFO L93 Difference]: Finished difference Result 635 states and 1777 transitions. [2021-03-10 22:06:09,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:09,924 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:09,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:09,924 INFO L225 Difference]: With dead ends: 635 [2021-03-10 22:06:09,924 INFO L226 Difference]: Without dead ends: 629 [2021-03-10 22:06:09,924 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 297.4ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:06:09,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-03-10 22:06:09,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 312. [2021-03-10 22:06:09,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9581993569131835) internal successors, (920), 311 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:09,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 920 transitions. [2021-03-10 22:06:09,928 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 920 transitions. Word has length 20 [2021-03-10 22:06:09,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:09,928 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 920 transitions. [2021-03-10 22:06:09,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:09,929 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 920 transitions. [2021-03-10 22:06:09,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:09,929 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:09,929 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:10,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5048,559 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:10,129 INFO L428 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:10,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:10,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1511541731, now seen corresponding path program 557 times [2021-03-10 22:06:10,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:10,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696458031] [2021-03-10 22:06:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:10,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:10,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696458031] [2021-03-10 22:06:10,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300572115] [2021-03-10 22:06:10,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:10,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:06:10,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:10,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:06:10,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:10,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:06:10,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:10,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:10,407 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:10,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:06:10,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:10,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:06:10,413 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:10,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:10,416 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:10,448 INFO L628 ElimStorePlain]: treesize reduction 24, result has 53.8 percent of original size [2021-03-10 22:06:10,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:10,449 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:95, output treesize:28 [2021-03-10 22:06:10,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:10,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:10,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 22:06:10,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535047491] [2021-03-10 22:06:10,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:06:10,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:10,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:06:10,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:06:10,522 INFO L87 Difference]: Start difference. First operand 312 states and 920 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:11,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:11,003 INFO L93 Difference]: Finished difference Result 641 states and 1798 transitions. [2021-03-10 22:06:11,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:06:11,004 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:11,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:11,004 INFO L225 Difference]: With dead ends: 641 [2021-03-10 22:06:11,004 INFO L226 Difference]: Without dead ends: 641 [2021-03-10 22:06:11,005 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 486.2ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:06:11,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-03-10 22:06:11,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 310. [2021-03-10 22:06:11,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9611650485436893) internal successors, (915), 309 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:11,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 915 transitions. [2021-03-10 22:06:11,009 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 915 transitions. Word has length 20 [2021-03-10 22:06:11,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:11,009 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 915 transitions. [2021-03-10 22:06:11,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:11,009 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 915 transitions. [2021-03-10 22:06:11,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:11,009 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:11,009 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:11,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5057 [2021-03-10 22:06:11,209 INFO L428 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:11,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:11,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1743189767, now seen corresponding path program 558 times [2021-03-10 22:06:11,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:11,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792670091] [2021-03-10 22:06:11,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:11,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:11,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:11,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792670091] [2021-03-10 22:06:11,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216176600] [2021-03-10 22:06:11,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:11,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:06:11,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:11,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:11,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:11,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:11,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:06:11,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159500627] [2021-03-10 22:06:11,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:06:11,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:11,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:06:11,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:06:11,498 INFO L87 Difference]: Start difference. First operand 310 states and 915 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:11,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:11,775 INFO L93 Difference]: Finished difference Result 624 states and 1770 transitions. [2021-03-10 22:06:11,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:11,776 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:11,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:11,776 INFO L225 Difference]: With dead ends: 624 [2021-03-10 22:06:11,776 INFO L226 Difference]: Without dead ends: 624 [2021-03-10 22:06:11,776 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 302.3ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:06:11,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-03-10 22:06:11,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 308. [2021-03-10 22:06:11,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.964169381107492) internal successors, (910), 307 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:11,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 910 transitions. [2021-03-10 22:06:11,780 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 910 transitions. Word has length 20 [2021-03-10 22:06:11,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:11,780 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 910 transitions. [2021-03-10 22:06:11,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:11,780 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 910 transitions. [2021-03-10 22:06:11,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:11,781 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:11,781 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:11,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5066 [2021-03-10 22:06:11,996 INFO L428 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:11,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:11,996 INFO L82 PathProgramCache]: Analyzing trace with hash 16863173, now seen corresponding path program 559 times [2021-03-10 22:06:11,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:11,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951336528] [2021-03-10 22:06:11,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:12,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951336528] [2021-03-10 22:06:12,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19010713] [2021-03-10 22:06:12,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:12,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:12,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:12,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:12,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:06:12,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825015666] [2021-03-10 22:06:12,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:06:12,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:12,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:06:12,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:06:12,277 INFO L87 Difference]: Start difference. First operand 308 states and 910 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:12,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:12,558 INFO L93 Difference]: Finished difference Result 649 states and 1824 transitions. [2021-03-10 22:06:12,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:12,558 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:12,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:12,559 INFO L225 Difference]: With dead ends: 649 [2021-03-10 22:06:12,559 INFO L226 Difference]: Without dead ends: 649 [2021-03-10 22:06:12,559 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 290.3ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:12,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-03-10 22:06:12,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 293. [2021-03-10 22:06:12,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.962328767123288) internal successors, (865), 292 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:12,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-03-10 22:06:12,563 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-03-10 22:06:12,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:12,563 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-03-10 22:06:12,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:12,563 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-03-10 22:06:12,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:12,563 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:12,563 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:12,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5072 [2021-03-10 22:06:12,764 INFO L428 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:12,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:12,764 INFO L82 PathProgramCache]: Analyzing trace with hash -784643029, now seen corresponding path program 560 times [2021-03-10 22:06:12,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:12,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509663221] [2021-03-10 22:06:12,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:12,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509663221] [2021-03-10 22:06:12,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734936243] [2021-03-10 22:06:12,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:12,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:12,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:12,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:12,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:13,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:13,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:13,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:06:13,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882797722] [2021-03-10 22:06:13,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:06:13,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:13,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:06:13,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:06:13,033 INFO L87 Difference]: Start difference. First operand 293 states and 865 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:13,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:13,260 INFO L93 Difference]: Finished difference Result 446 states and 1280 transitions. [2021-03-10 22:06:13,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:13,260 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:13,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:13,261 INFO L225 Difference]: With dead ends: 446 [2021-03-10 22:06:13,261 INFO L226 Difference]: Without dead ends: 434 [2021-03-10 22:06:13,261 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 243.7ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:06:13,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-03-10 22:06:13,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 299. [2021-03-10 22:06:13,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.953020134228188) internal successors, (880), 298 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:13,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2021-03-10 22:06:13,264 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2021-03-10 22:06:13,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:13,264 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2021-03-10 22:06:13,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:13,264 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2021-03-10 22:06:13,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:13,264 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:13,264 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:13,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5077 [2021-03-10 22:06:13,465 INFO L428 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:13,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:13,465 INFO L82 PathProgramCache]: Analyzing trace with hash -33242591, now seen corresponding path program 561 times [2021-03-10 22:06:13,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:13,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652615948] [2021-03-10 22:06:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:13,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:13,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652615948] [2021-03-10 22:06:13,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926576092] [2021-03-10 22:06:13,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:13,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:06:13,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:13,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:13,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:13,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:13,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:06:13,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406627917] [2021-03-10 22:06:13,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:06:13,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:13,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:06:13,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:06:13,730 INFO L87 Difference]: Start difference. First operand 299 states and 880 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:13,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:13,957 INFO L93 Difference]: Finished difference Result 471 states and 1332 transitions. [2021-03-10 22:06:13,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:13,957 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:13,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:13,958 INFO L225 Difference]: With dead ends: 471 [2021-03-10 22:06:13,958 INFO L226 Difference]: Without dead ends: 465 [2021-03-10 22:06:13,958 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 248.4ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:13,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-03-10 22:06:13,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 309. [2021-03-10 22:06:13,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:13,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2021-03-10 22:06:13,961 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2021-03-10 22:06:13,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:13,961 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2021-03-10 22:06:13,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:13,961 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2021-03-10 22:06:13,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:13,962 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:13,962 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:14,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5085 [2021-03-10 22:06:14,162 INFO L428 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:14,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:14,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1948666517, now seen corresponding path program 562 times [2021-03-10 22:06:14,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:14,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241340787] [2021-03-10 22:06:14,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:14,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241340787] [2021-03-10 22:06:14,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860333636] [2021-03-10 22:06:14,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:14,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:14,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:14,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:14,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:14,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:14,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:06:14,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181204678] [2021-03-10 22:06:14,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:06:14,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:14,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:06:14,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:06:14,432 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:14,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:14,633 INFO L93 Difference]: Finished difference Result 442 states and 1278 transitions. [2021-03-10 22:06:14,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:14,633 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:14,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:14,634 INFO L225 Difference]: With dead ends: 442 [2021-03-10 22:06:14,634 INFO L226 Difference]: Without dead ends: 442 [2021-03-10 22:06:14,634 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 234.2ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:14,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-03-10 22:06:14,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 297. [2021-03-10 22:06:14,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.956081081081081) internal successors, (875), 296 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:14,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2021-03-10 22:06:14,637 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2021-03-10 22:06:14,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:14,637 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2021-03-10 22:06:14,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:14,637 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2021-03-10 22:06:14,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:14,638 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:14,638 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:14,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5091,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:14,838 INFO L428 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:14,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:14,838 INFO L82 PathProgramCache]: Analyzing trace with hash -2145671221, now seen corresponding path program 563 times [2021-03-10 22:06:14,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:14,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144710025] [2021-03-10 22:06:14,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:14,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144710025] [2021-03-10 22:06:14,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704131728] [2021-03-10 22:06:14,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:14,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:06:14,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:14,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:06:14,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:15,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:15,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:15,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:06:15,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:15,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:15,079 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:15,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:06:15,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:15,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:15,085 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:15,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:06:15,089 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:15,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:15,092 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:15,125 INFO L628 ElimStorePlain]: treesize reduction 47, result has 37.3 percent of original size [2021-03-10 22:06:15,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:15,126 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:142, output treesize:28 [2021-03-10 22:06:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:15,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:15,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:06:15,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365516120] [2021-03-10 22:06:15,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:15,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:15,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:15,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:15,191 INFO L87 Difference]: Start difference. First operand 297 states and 875 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:15,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:15,493 INFO L93 Difference]: Finished difference Result 477 states and 1347 transitions. [2021-03-10 22:06:15,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:15,494 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:15,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:15,494 INFO L225 Difference]: With dead ends: 477 [2021-03-10 22:06:15,494 INFO L226 Difference]: Without dead ends: 471 [2021-03-10 22:06:15,494 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 308.1ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:06:15,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-03-10 22:06:15,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 311. [2021-03-10 22:06:15,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9483870967741934) internal successors, (914), 310 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:15,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 914 transitions. [2021-03-10 22:06:15,498 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 914 transitions. Word has length 20 [2021-03-10 22:06:15,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:15,498 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 914 transitions. [2021-03-10 22:06:15,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:15,498 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 914 transitions. [2021-03-10 22:06:15,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:15,498 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:15,498 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:15,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5099 [2021-03-10 22:06:15,699 INFO L428 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:15,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:15,699 INFO L82 PathProgramCache]: Analyzing trace with hash 233872149, now seen corresponding path program 564 times [2021-03-10 22:06:15,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:15,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580691280] [2021-03-10 22:06:15,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:15,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:15,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580691280] [2021-03-10 22:06:15,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2527808] [2021-03-10 22:06:15,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:15,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:06:15,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:15,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:06:15,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:15,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:06:15,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:15,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:15,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:15,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:06:15,948 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:15,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:06:15,952 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:15,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:15,955 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:15,987 INFO L628 ElimStorePlain]: treesize reduction 24, result has 53.8 percent of original size [2021-03-10 22:06:15,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:15,988 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:95, output treesize:28 [2021-03-10 22:06:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:16,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:16,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:06:16,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722036550] [2021-03-10 22:06:16,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:16,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:16,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:16,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:16,057 INFO L87 Difference]: Start difference. First operand 311 states and 914 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:16,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:16,410 INFO L93 Difference]: Finished difference Result 477 states and 1353 transitions. [2021-03-10 22:06:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:06:16,410 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:16,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:16,411 INFO L225 Difference]: With dead ends: 477 [2021-03-10 22:06:16,411 INFO L226 Difference]: Without dead ends: 477 [2021-03-10 22:06:16,411 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 350.7ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:06:16,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-03-10 22:06:16,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 309. [2021-03-10 22:06:16,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9512987012987013) internal successors, (909), 308 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:16,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 909 transitions. [2021-03-10 22:06:16,415 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 909 transitions. Word has length 20 [2021-03-10 22:06:16,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:16,415 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 909 transitions. [2021-03-10 22:06:16,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:16,415 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 909 transitions. [2021-03-10 22:06:16,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:16,415 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:16,415 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:16,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5108,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:16,616 INFO L428 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:16,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:16,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1274107947, now seen corresponding path program 565 times [2021-03-10 22:06:16,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:16,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745078492] [2021-03-10 22:06:16,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:16,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:16,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745078492] [2021-03-10 22:06:16,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643162819] [2021-03-10 22:06:16,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:16,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:16,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:16,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:16,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:06:16,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739550901] [2021-03-10 22:06:16,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:06:16,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:16,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:06:16,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:06:16,869 INFO L87 Difference]: Start difference. First operand 309 states and 909 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:17,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:17,057 INFO L93 Difference]: Finished difference Result 452 states and 1303 transitions. [2021-03-10 22:06:17,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:17,058 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:17,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:17,059 INFO L225 Difference]: With dead ends: 452 [2021-03-10 22:06:17,059 INFO L226 Difference]: Without dead ends: 452 [2021-03-10 22:06:17,059 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 198.2ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:17,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-03-10 22:06:17,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 295. [2021-03-10 22:06:17,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.9591836734693877) internal successors, (870), 294 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:17,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 870 transitions. [2021-03-10 22:06:17,062 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 870 transitions. Word has length 20 [2021-03-10 22:06:17,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:17,062 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 870 transitions. [2021-03-10 22:06:17,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:17,062 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 870 transitions. [2021-03-10 22:06:17,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:17,062 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:17,062 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:17,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5115,568 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:17,263 INFO L428 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:17,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:17,263 INFO L82 PathProgramCache]: Analyzing trace with hash 876362367, now seen corresponding path program 566 times [2021-03-10 22:06:17,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:17,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449834988] [2021-03-10 22:06:17,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:17,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449834988] [2021-03-10 22:06:17,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867073096] [2021-03-10 22:06:17,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:17,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:17,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:17,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:17,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:17,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:17,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:17,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:06:17,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499979170] [2021-03-10 22:06:17,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:06:17,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:17,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:06:17,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:06:17,522 INFO L87 Difference]: Start difference. First operand 295 states and 870 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:17,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:17,760 INFO L93 Difference]: Finished difference Result 536 states and 1488 transitions. [2021-03-10 22:06:17,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:17,761 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:17,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:17,761 INFO L225 Difference]: With dead ends: 536 [2021-03-10 22:06:17,761 INFO L226 Difference]: Without dead ends: 530 [2021-03-10 22:06:17,762 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 213.6ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:17,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-03-10 22:06:17,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 313. [2021-03-10 22:06:17,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.951923076923077) internal successors, (921), 312 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 921 transitions. [2021-03-10 22:06:17,765 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 921 transitions. Word has length 20 [2021-03-10 22:06:17,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:17,765 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 921 transitions. [2021-03-10 22:06:17,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:17,766 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 921 transitions. [2021-03-10 22:06:17,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:17,766 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:17,766 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:17,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5118 [2021-03-10 22:06:17,966 INFO L428 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:17,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:17,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1039061559, now seen corresponding path program 567 times [2021-03-10 22:06:17,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:17,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129513016] [2021-03-10 22:06:17,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:18,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129513016] [2021-03-10 22:06:18,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125839972] [2021-03-10 22:06:18,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:18,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:06:18,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:18,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:18,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:18,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:18,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:06:18,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989373190] [2021-03-10 22:06:18,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:06:18,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:18,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:06:18,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:06:18,222 INFO L87 Difference]: Start difference. First operand 313 states and 921 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:18,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:18,469 INFO L93 Difference]: Finished difference Result 536 states and 1494 transitions. [2021-03-10 22:06:18,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:06:18,470 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:18,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:18,470 INFO L225 Difference]: With dead ends: 536 [2021-03-10 22:06:18,470 INFO L226 Difference]: Without dead ends: 536 [2021-03-10 22:06:18,470 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 239.7ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:06:18,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-03-10 22:06:18,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 311. [2021-03-10 22:06:18,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9548387096774196) internal successors, (916), 310 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:18,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 916 transitions. [2021-03-10 22:06:18,475 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 916 transitions. Word has length 20 [2021-03-10 22:06:18,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:18,475 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 916 transitions. [2021-03-10 22:06:18,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:18,475 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 916 transitions. [2021-03-10 22:06:18,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:18,475 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:18,475 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:18,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 570 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5123 [2021-03-10 22:06:18,676 INFO L428 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:18,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:18,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1174239, now seen corresponding path program 568 times [2021-03-10 22:06:18,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:18,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23657233] [2021-03-10 22:06:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:18,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23657233] [2021-03-10 22:06:18,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512705847] [2021-03-10 22:06:18,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:18,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:18,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:18,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:18,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:18,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:18,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:06:18,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219090011] [2021-03-10 22:06:18,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:06:18,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:18,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:06:18,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:06:18,933 INFO L87 Difference]: Start difference. First operand 311 states and 916 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:19,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:19,150 INFO L93 Difference]: Finished difference Result 525 states and 1481 transitions. [2021-03-10 22:06:19,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:19,150 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:19,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:19,151 INFO L225 Difference]: With dead ends: 525 [2021-03-10 22:06:19,151 INFO L226 Difference]: Without dead ends: 525 [2021-03-10 22:06:19,151 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 205.4ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:19,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-03-10 22:06:19,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 309. [2021-03-10 22:06:19,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.957792207792208) internal successors, (911), 308 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:19,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 911 transitions. [2021-03-10 22:06:19,154 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 911 transitions. Word has length 20 [2021-03-10 22:06:19,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:19,155 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 911 transitions. [2021-03-10 22:06:19,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:19,155 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 911 transitions. [2021-03-10 22:06:19,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:19,155 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:19,155 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:19,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5129 [2021-03-10 22:06:19,355 INFO L428 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:19,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:19,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1761227179, now seen corresponding path program 569 times [2021-03-10 22:06:19,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:19,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314381359] [2021-03-10 22:06:19,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:19,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314381359] [2021-03-10 22:06:19,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272759215] [2021-03-10 22:06:19,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:19,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:06:19,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:19,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:06:19,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:19,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:06:19,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:19,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:19,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:19,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:19,601 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:19,620 INFO L628 ElimStorePlain]: treesize reduction 12, result has 62.5 percent of original size [2021-03-10 22:06:19,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:06:19,621 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:63, output treesize:20 [2021-03-10 22:06:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:19,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:19,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:06:19,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995885594] [2021-03-10 22:06:19,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:19,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:19,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:19,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:19,666 INFO L87 Difference]: Start difference. First operand 309 states and 911 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:19,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:19,936 INFO L93 Difference]: Finished difference Result 515 states and 1454 transitions. [2021-03-10 22:06:19,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:19,936 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:19,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:19,937 INFO L225 Difference]: With dead ends: 515 [2021-03-10 22:06:19,937 INFO L226 Difference]: Without dead ends: 515 [2021-03-10 22:06:19,937 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 238.5ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:06:19,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-03-10 22:06:19,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 292. [2021-03-10 22:06:19,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9587628865979383) internal successors, (861), 291 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:19,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2021-03-10 22:06:19,940 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2021-03-10 22:06:19,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:19,941 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2021-03-10 22:06:19,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:19,941 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2021-03-10 22:06:19,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:19,941 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:19,941 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:20,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5132 [2021-03-10 22:06:20,141 INFO L428 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:20,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:20,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1171432537, now seen corresponding path program 570 times [2021-03-10 22:06:20,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:20,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922667573] [2021-03-10 22:06:20,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:20,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922667573] [2021-03-10 22:06:20,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613759829] [2021-03-10 22:06:20,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:20,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:06:20,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:20,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:20,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:20,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:20,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:06:20,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463387086] [2021-03-10 22:06:20,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:06:20,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:20,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:06:20,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:06:20,381 INFO L87 Difference]: Start difference. First operand 292 states and 861 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:20,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:20,671 INFO L93 Difference]: Finished difference Result 491 states and 1372 transitions. [2021-03-10 22:06:20,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:20,671 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:20,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:20,672 INFO L225 Difference]: With dead ends: 491 [2021-03-10 22:06:20,672 INFO L226 Difference]: Without dead ends: 473 [2021-03-10 22:06:20,672 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 274.3ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:20,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-03-10 22:06:20,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 298. [2021-03-10 22:06:20,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9494949494949494) internal successors, (876), 297 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:20,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2021-03-10 22:06:20,676 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2021-03-10 22:06:20,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:20,676 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2021-03-10 22:06:20,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:20,676 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2021-03-10 22:06:20,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:20,676 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:20,676 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:20,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5136,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:20,877 INFO L428 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:20,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:20,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1111178657, now seen corresponding path program 571 times [2021-03-10 22:06:20,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:20,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69653599] [2021-03-10 22:06:20,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:20,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69653599] [2021-03-10 22:06:20,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233406965] [2021-03-10 22:06:20,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:21,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:21,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:21,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:21,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:06:21,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559869319] [2021-03-10 22:06:21,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:06:21,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:21,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:06:21,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:06:21,143 INFO L87 Difference]: Start difference. First operand 298 states and 876 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:21,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:21,445 INFO L93 Difference]: Finished difference Result 487 states and 1364 transitions. [2021-03-10 22:06:21,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:21,446 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:21,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:21,446 INFO L225 Difference]: With dead ends: 487 [2021-03-10 22:06:21,446 INFO L226 Difference]: Without dead ends: 475 [2021-03-10 22:06:21,446 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 318.0ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:06:21,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-03-10 22:06:21,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 300. [2021-03-10 22:06:21,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9464882943143813) internal successors, (881), 299 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:21,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2021-03-10 22:06:21,450 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2021-03-10 22:06:21,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:21,450 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2021-03-10 22:06:21,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:21,450 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2021-03-10 22:06:21,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:21,450 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:21,450 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:21,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5141 [2021-03-10 22:06:21,657 INFO L428 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:21,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:21,657 INFO L82 PathProgramCache]: Analyzing trace with hash -359778219, now seen corresponding path program 572 times [2021-03-10 22:06:21,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:21,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112650312] [2021-03-10 22:06:21,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:21,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:21,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112650312] [2021-03-10 22:06:21,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002797946] [2021-03-10 22:06:21,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:21,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:21,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:21,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:21,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:21,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:21,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:06:21,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780669258] [2021-03-10 22:06:21,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:06:21,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:21,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:06:21,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:06:21,933 INFO L87 Difference]: Start difference. First operand 300 states and 881 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:22,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:22,407 INFO L93 Difference]: Finished difference Result 512 states and 1416 transitions. [2021-03-10 22:06:22,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:06:22,408 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:22,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:22,408 INFO L225 Difference]: With dead ends: 512 [2021-03-10 22:06:22,408 INFO L226 Difference]: Without dead ends: 506 [2021-03-10 22:06:22,408 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 460.9ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:06:22,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-03-10 22:06:22,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 310. [2021-03-10 22:06:22,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9385113268608416) internal successors, (908), 309 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:22,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2021-03-10 22:06:22,412 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2021-03-10 22:06:22,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:22,412 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2021-03-10 22:06:22,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:22,412 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2021-03-10 22:06:22,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:22,413 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:22,413 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:22,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5147,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:22,613 INFO L428 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:22,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:22,613 INFO L82 PathProgramCache]: Analyzing trace with hash 2019765151, now seen corresponding path program 573 times [2021-03-10 22:06:22,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:22,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651018139] [2021-03-10 22:06:22,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:22,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651018139] [2021-03-10 22:06:22,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276225562] [2021-03-10 22:06:22,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:22,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:06:22,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:22,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:06:22,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:22,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:22,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:22,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:06:22,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:22,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:22,894 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:22,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:06:22,898 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:22,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:22,902 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:22,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:06:22,905 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:22,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:22,908 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:22,943 INFO L628 ElimStorePlain]: treesize reduction 47, result has 37.3 percent of original size [2021-03-10 22:06:22,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:22,944 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:142, output treesize:28 [2021-03-10 22:06:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:23,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:23,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:06:23,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592099942] [2021-03-10 22:06:23,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:23,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:23,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:23,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:23,012 INFO L87 Difference]: Start difference. First operand 310 states and 908 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:23,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:23,413 INFO L93 Difference]: Finished difference Result 483 states and 1362 transitions. [2021-03-10 22:06:23,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:23,413 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:23,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:23,414 INFO L225 Difference]: With dead ends: 483 [2021-03-10 22:06:23,414 INFO L226 Difference]: Without dead ends: 483 [2021-03-10 22:06:23,414 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 443.2ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:06:23,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-03-10 22:06:23,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 296. [2021-03-10 22:06:23,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.952542372881356) internal successors, (871), 295 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:23,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 871 transitions. [2021-03-10 22:06:23,418 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 871 transitions. Word has length 20 [2021-03-10 22:06:23,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:23,418 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 871 transitions. [2021-03-10 22:06:23,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:23,418 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 871 transitions. [2021-03-10 22:06:23,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:23,418 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:23,418 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:23,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5153 [2021-03-10 22:06:23,618 INFO L428 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:23,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:23,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1747645511, now seen corresponding path program 574 times [2021-03-10 22:06:23,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:23,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222707455] [2021-03-10 22:06:23,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:23,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:23,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222707455] [2021-03-10 22:06:23,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646552845] [2021-03-10 22:06:23,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:23,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:23,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:23,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:23,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:23,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:23,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:06:23,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132295818] [2021-03-10 22:06:23,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:06:23,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:23,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:06:23,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:06:23,867 INFO L87 Difference]: Start difference. First operand 296 states and 871 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:24,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:24,116 INFO L93 Difference]: Finished difference Result 432 states and 1233 transitions. [2021-03-10 22:06:24,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:24,116 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:24,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:24,116 INFO L225 Difference]: With dead ends: 432 [2021-03-10 22:06:24,116 INFO L226 Difference]: Without dead ends: 420 [2021-03-10 22:06:24,116 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:24,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-03-10 22:06:24,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 300. [2021-03-10 22:06:24,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9464882943143813) internal successors, (881), 299 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:24,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2021-03-10 22:06:24,120 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2021-03-10 22:06:24,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:24,120 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2021-03-10 22:06:24,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:24,120 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2021-03-10 22:06:24,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:24,120 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:24,120 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:24,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5159,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:24,320 INFO L428 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:24,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:24,321 INFO L82 PathProgramCache]: Analyzing trace with hash -996245073, now seen corresponding path program 575 times [2021-03-10 22:06:24,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:24,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328667394] [2021-03-10 22:06:24,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:24,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328667394] [2021-03-10 22:06:24,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187831929] [2021-03-10 22:06:24,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:24,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:24,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:24,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:24,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:24,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:24,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:06:24,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100387704] [2021-03-10 22:06:24,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:06:24,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:24,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:06:24,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:06:24,566 INFO L87 Difference]: Start difference. First operand 300 states and 881 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:24,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:24,884 INFO L93 Difference]: Finished difference Result 457 states and 1285 transitions. [2021-03-10 22:06:24,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:06:24,884 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:24,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:24,885 INFO L225 Difference]: With dead ends: 457 [2021-03-10 22:06:24,885 INFO L226 Difference]: Without dead ends: 451 [2021-03-10 22:06:24,885 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 305.7ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:06:24,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-03-10 22:06:24,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 310. [2021-03-10 22:06:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9385113268608416) internal successors, (908), 309 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:24,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2021-03-10 22:06:24,888 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2021-03-10 22:06:24,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:24,889 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2021-03-10 22:06:24,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:24,889 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2021-03-10 22:06:24,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:24,889 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:24,889 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:25,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 578 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5167 [2021-03-10 22:06:25,089 INFO L428 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:25,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:25,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1383298297, now seen corresponding path program 576 times [2021-03-10 22:06:25,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:25,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384779095] [2021-03-10 22:06:25,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:25,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384779095] [2021-03-10 22:06:25,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900830662] [2021-03-10 22:06:25,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:25,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:06:25,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:25,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:25,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:25,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:25,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:06:25,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985061764] [2021-03-10 22:06:25,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:06:25,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:25,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:06:25,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:06:25,336 INFO L87 Difference]: Start difference. First operand 310 states and 908 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:25,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:25,595 INFO L93 Difference]: Finished difference Result 428 states and 1231 transitions. [2021-03-10 22:06:25,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:25,595 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:25,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:25,596 INFO L225 Difference]: With dead ends: 428 [2021-03-10 22:06:25,596 INFO L226 Difference]: Without dead ends: 428 [2021-03-10 22:06:25,596 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 229.9ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:25,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-03-10 22:06:25,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 298. [2021-03-10 22:06:25,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9494949494949494) internal successors, (876), 297 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:25,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2021-03-10 22:06:25,599 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2021-03-10 22:06:25,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:25,599 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2021-03-10 22:06:25,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:25,599 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2021-03-10 22:06:25,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:25,600 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:25,600 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:25,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5173,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:25,800 INFO L428 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:25,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:25,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1186293593, now seen corresponding path program 577 times [2021-03-10 22:06:25,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:25,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512779500] [2021-03-10 22:06:25,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:25,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:25,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512779500] [2021-03-10 22:06:25,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810775230] [2021-03-10 22:06:25,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:25,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:25,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:26,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:26,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:06:26,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106053432] [2021-03-10 22:06:26,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:06:26,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:26,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:06:26,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:06:26,032 INFO L87 Difference]: Start difference. First operand 298 states and 876 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:26,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:26,244 INFO L93 Difference]: Finished difference Result 463 states and 1300 transitions. [2021-03-10 22:06:26,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:26,244 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:26,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:26,245 INFO L225 Difference]: With dead ends: 463 [2021-03-10 22:06:26,245 INFO L226 Difference]: Without dead ends: 457 [2021-03-10 22:06:26,245 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 203.1ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:26,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-03-10 22:06:26,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 312. [2021-03-10 22:06:26,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.942122186495177) internal successors, (915), 311 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:26,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 915 transitions. [2021-03-10 22:06:26,249 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 915 transitions. Word has length 20 [2021-03-10 22:06:26,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:26,249 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 915 transitions. [2021-03-10 22:06:26,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:26,249 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 915 transitions. [2021-03-10 22:06:26,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:26,249 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:26,249 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:26,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5180,580 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:26,449 INFO L428 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:26,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:26,450 INFO L82 PathProgramCache]: Analyzing trace with hash -729130333, now seen corresponding path program 578 times [2021-03-10 22:06:26,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:26,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259733434] [2021-03-10 22:06:26,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:26,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259733434] [2021-03-10 22:06:26,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924364297] [2021-03-10 22:06:26,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:26,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:26,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:26,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:26,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:26,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:26,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:06:26,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731588742] [2021-03-10 22:06:26,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:06:26,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:26,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:06:26,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:06:26,680 INFO L87 Difference]: Start difference. First operand 312 states and 915 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:26,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:26,937 INFO L93 Difference]: Finished difference Result 463 states and 1306 transitions. [2021-03-10 22:06:26,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:06:26,937 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:26,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:26,938 INFO L225 Difference]: With dead ends: 463 [2021-03-10 22:06:26,938 INFO L226 Difference]: Without dead ends: 463 [2021-03-10 22:06:26,938 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:06:26,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-03-10 22:06:26,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 310. [2021-03-10 22:06:26,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9449838187702264) internal successors, (910), 309 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:26,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 910 transitions. [2021-03-10 22:06:26,941 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 910 transitions. Word has length 20 [2021-03-10 22:06:26,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:26,941 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 910 transitions. [2021-03-10 22:06:26,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:26,942 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 910 transitions. [2021-03-10 22:06:26,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:26,942 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:26,942 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:27,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5186,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:27,142 INFO L428 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:27,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:27,142 INFO L82 PathProgramCache]: Analyzing trace with hash 311105465, now seen corresponding path program 579 times [2021-03-10 22:06:27,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:27,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033964837] [2021-03-10 22:06:27,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:27,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033964837] [2021-03-10 22:06:27,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294108325] [2021-03-10 22:06:27,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:27,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:06:27,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:27,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:27,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:27,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:27,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:06:27,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89967838] [2021-03-10 22:06:27,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:06:27,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:27,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:06:27,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:06:27,360 INFO L87 Difference]: Start difference. First operand 310 states and 910 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:27,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:27,568 INFO L93 Difference]: Finished difference Result 438 states and 1256 transitions. [2021-03-10 22:06:27,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:27,568 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:27,569 INFO L225 Difference]: With dead ends: 438 [2021-03-10 22:06:27,569 INFO L226 Difference]: Without dead ends: 438 [2021-03-10 22:06:27,569 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:06:27,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-03-10 22:06:27,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 294. [2021-03-10 22:06:27,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.955631399317406) internal successors, (866), 293 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:27,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2021-03-10 22:06:27,572 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2021-03-10 22:06:27,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:27,572 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2021-03-10 22:06:27,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:27,572 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2021-03-10 22:06:27,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:27,572 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:27,572 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:27,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5191,582 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:27,773 INFO L428 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:27,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:27,773 INFO L82 PathProgramCache]: Analyzing trace with hash 2009828929, now seen corresponding path program 580 times [2021-03-10 22:06:27,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:27,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494580207] [2021-03-10 22:06:27,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:27,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494580207] [2021-03-10 22:06:27,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564993069] [2021-03-10 22:06:27,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:27,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:27,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:27,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:27,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:28,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:28,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:06:28,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715714998] [2021-03-10 22:06:28,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:06:28,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:28,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:06:28,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:06:28,011 INFO L87 Difference]: Start difference. First operand 294 states and 866 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:28,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:28,262 INFO L93 Difference]: Finished difference Result 422 states and 1208 transitions. [2021-03-10 22:06:28,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:28,262 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:28,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:28,263 INFO L225 Difference]: With dead ends: 422 [2021-03-10 22:06:28,263 INFO L226 Difference]: Without dead ends: 410 [2021-03-10 22:06:28,263 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 241.6ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:06:28,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-03-10 22:06:28,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 300. [2021-03-10 22:06:28,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9464882943143813) internal successors, (881), 299 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:28,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2021-03-10 22:06:28,270 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2021-03-10 22:06:28,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:28,270 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2021-03-10 22:06:28,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:28,270 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2021-03-10 22:06:28,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:28,270 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:28,270 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:28,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5193 [2021-03-10 22:06:28,471 INFO L428 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:28,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:28,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1533737929, now seen corresponding path program 581 times [2021-03-10 22:06:28,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:28,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550436807] [2021-03-10 22:06:28,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:28,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550436807] [2021-03-10 22:06:28,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601571132] [2021-03-10 22:06:28,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:28,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:28,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:28,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:28,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:28,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:28,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:06:28,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638890169] [2021-03-10 22:06:28,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:06:28,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:28,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:06:28,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:06:28,731 INFO L87 Difference]: Start difference. First operand 300 states and 881 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:28,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:28,964 INFO L93 Difference]: Finished difference Result 447 states and 1260 transitions. [2021-03-10 22:06:28,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:28,965 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:28,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:28,965 INFO L225 Difference]: With dead ends: 447 [2021-03-10 22:06:28,966 INFO L226 Difference]: Without dead ends: 441 [2021-03-10 22:06:28,966 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 242.2ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:28,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-03-10 22:06:28,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 310. [2021-03-10 22:06:28,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9385113268608416) internal successors, (908), 309 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:28,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2021-03-10 22:06:28,969 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2021-03-10 22:06:28,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:28,969 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2021-03-10 22:06:28,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:28,969 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2021-03-10 22:06:28,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:28,969 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:28,970 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:29,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 584 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5201 [2021-03-10 22:06:29,170 INFO L428 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:29,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:29,170 INFO L82 PathProgramCache]: Analyzing trace with hash 845805441, now seen corresponding path program 582 times [2021-03-10 22:06:29,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:29,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91022092] [2021-03-10 22:06:29,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:29,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91022092] [2021-03-10 22:06:29,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630185560] [2021-03-10 22:06:29,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:29,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:06:29,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:29,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:29,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:29,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:29,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:29,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:06:29,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089711141] [2021-03-10 22:06:29,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:06:29,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:29,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:06:29,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:06:29,424 INFO L87 Difference]: Start difference. First operand 310 states and 908 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:29,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:29,670 INFO L93 Difference]: Finished difference Result 418 states and 1206 transitions. [2021-03-10 22:06:29,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:29,670 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:29,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:29,671 INFO L225 Difference]: With dead ends: 418 [2021-03-10 22:06:29,671 INFO L226 Difference]: Without dead ends: 418 [2021-03-10 22:06:29,671 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 241.9ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:29,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-03-10 22:06:29,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 298. [2021-03-10 22:06:29,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9494949494949494) internal successors, (876), 297 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:29,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2021-03-10 22:06:29,674 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2021-03-10 22:06:29,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:29,674 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2021-03-10 22:06:29,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:29,674 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2021-03-10 22:06:29,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:29,675 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:29,675 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:29,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5208 [2021-03-10 22:06:29,875 INFO L428 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:29,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:29,875 INFO L82 PathProgramCache]: Analyzing trace with hash 648800737, now seen corresponding path program 583 times [2021-03-10 22:06:29,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:29,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581873837] [2021-03-10 22:06:29,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:29,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581873837] [2021-03-10 22:06:29,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133470302] [2021-03-10 22:06:29,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:30,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:30,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:30,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:30,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:30,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:06:30,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028164094] [2021-03-10 22:06:30,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:06:30,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:30,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:06:30,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:06:30,109 INFO L87 Difference]: Start difference. First operand 298 states and 876 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:30,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:30,332 INFO L93 Difference]: Finished difference Result 453 states and 1275 transitions. [2021-03-10 22:06:30,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:30,332 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:30,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:30,333 INFO L225 Difference]: With dead ends: 453 [2021-03-10 22:06:30,333 INFO L226 Difference]: Without dead ends: 447 [2021-03-10 22:06:30,333 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 204.4ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:30,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-03-10 22:06:30,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 312. [2021-03-10 22:06:30,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.942122186495177) internal successors, (915), 311 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:30,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 915 transitions. [2021-03-10 22:06:30,336 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 915 transitions. Word has length 20 [2021-03-10 22:06:30,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:30,337 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 915 transitions. [2021-03-10 22:06:30,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:30,337 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 915 transitions. [2021-03-10 22:06:30,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:30,337 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:30,337 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:30,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5215,586 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:30,537 INFO L428 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:30,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:30,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1266623189, now seen corresponding path program 584 times [2021-03-10 22:06:30,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:30,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210994705] [2021-03-10 22:06:30,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:30,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210994705] [2021-03-10 22:06:30,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953952290] [2021-03-10 22:06:30,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:30,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:30,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:30,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:30,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:30,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:30,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:06:30,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682699618] [2021-03-10 22:06:30,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:06:30,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:30,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:06:30,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:06:30,776 INFO L87 Difference]: Start difference. First operand 312 states and 915 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:31,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:31,065 INFO L93 Difference]: Finished difference Result 453 states and 1281 transitions. [2021-03-10 22:06:31,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:06:31,066 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:31,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:31,066 INFO L225 Difference]: With dead ends: 453 [2021-03-10 22:06:31,066 INFO L226 Difference]: Without dead ends: 453 [2021-03-10 22:06:31,066 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 244.7ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:06:31,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-03-10 22:06:31,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 310. [2021-03-10 22:06:31,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9449838187702264) internal successors, (910), 309 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:31,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 910 transitions. [2021-03-10 22:06:31,070 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 910 transitions. Word has length 20 [2021-03-10 22:06:31,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:31,070 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 910 transitions. [2021-03-10 22:06:31,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:31,070 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 910 transitions. [2021-03-10 22:06:31,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:31,070 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:31,070 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:31,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5220 [2021-03-10 22:06:31,271 INFO L428 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:31,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:31,271 INFO L82 PathProgramCache]: Analyzing trace with hash -226387391, now seen corresponding path program 585 times [2021-03-10 22:06:31,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:31,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797893695] [2021-03-10 22:06:31,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:31,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:31,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797893695] [2021-03-10 22:06:31,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813103568] [2021-03-10 22:06:31,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:31,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:06:31,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:31,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:31,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:31,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:31,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:06:31,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381207919] [2021-03-10 22:06:31,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:06:31,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:31,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:06:31,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:06:31,512 INFO L87 Difference]: Start difference. First operand 310 states and 910 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:31,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:31,747 INFO L93 Difference]: Finished difference Result 428 states and 1231 transitions. [2021-03-10 22:06:31,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:31,747 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:31,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:31,748 INFO L225 Difference]: With dead ends: 428 [2021-03-10 22:06:31,748 INFO L226 Difference]: Without dead ends: 428 [2021-03-10 22:06:31,748 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:31,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-03-10 22:06:31,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 296. [2021-03-10 22:06:31,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.952542372881356) internal successors, (871), 295 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:31,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 871 transitions. [2021-03-10 22:06:31,751 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 871 transitions. Word has length 20 [2021-03-10 22:06:31,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:31,751 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 871 transitions. [2021-03-10 22:06:31,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:31,751 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 871 transitions. [2021-03-10 22:06:31,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:31,751 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:31,751 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:31,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5226,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:31,952 INFO L428 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:31,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:31,952 INFO L82 PathProgramCache]: Analyzing trace with hash -624132971, now seen corresponding path program 586 times [2021-03-10 22:06:31,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:31,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13157819] [2021-03-10 22:06:31,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:32,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13157819] [2021-03-10 22:06:32,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802023621] [2021-03-10 22:06:32,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:32,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:32,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:32,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:32,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:32,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:32,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:06:32,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553065895] [2021-03-10 22:06:32,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:06:32,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:32,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:06:32,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:06:32,188 INFO L87 Difference]: Start difference. First operand 296 states and 871 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:32,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:32,451 INFO L93 Difference]: Finished difference Result 504 states and 1396 transitions. [2021-03-10 22:06:32,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:32,452 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:32,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:32,452 INFO L225 Difference]: With dead ends: 504 [2021-03-10 22:06:32,452 INFO L226 Difference]: Without dead ends: 498 [2021-03-10 22:06:32,452 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 224.4ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:32,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-03-10 22:06:32,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 314. [2021-03-10 22:06:32,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.9456869009584663) internal successors, (922), 313 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:32,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 922 transitions. [2021-03-10 22:06:32,456 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 922 transitions. Word has length 20 [2021-03-10 22:06:32,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:32,456 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 922 transitions. [2021-03-10 22:06:32,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:32,456 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 922 transitions. [2021-03-10 22:06:32,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:32,456 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:32,457 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:32,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5229,589 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:32,657 INFO L428 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:32,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:32,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1755410399, now seen corresponding path program 587 times [2021-03-10 22:06:32,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:32,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505766904] [2021-03-10 22:06:32,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:32,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:32,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505766904] [2021-03-10 22:06:32,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023331953] [2021-03-10 22:06:32,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:32,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:06:32,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:32,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:06:32,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:32,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:06:32,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:32,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,893 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:32,894 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:06:32,898 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:06:32,901 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:32,905 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:32,908 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:32,943 INFO L628 ElimStorePlain]: treesize reduction 33, result has 45.9 percent of original size [2021-03-10 22:06:32,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:32,944 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:138, output treesize:28 [2021-03-10 22:06:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:33,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:33,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-10 22:06:33,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124866992] [2021-03-10 22:06:33,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:33,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:33,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:33,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:33,015 INFO L87 Difference]: Start difference. First operand 314 states and 922 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:33,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:33,423 INFO L93 Difference]: Finished difference Result 504 states and 1402 transitions. [2021-03-10 22:06:33,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:06:33,423 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:33,424 INFO L225 Difference]: With dead ends: 504 [2021-03-10 22:06:33,424 INFO L226 Difference]: Without dead ends: 504 [2021-03-10 22:06:33,424 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:06:33,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-03-10 22:06:33,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 312. [2021-03-10 22:06:33,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9485530546623795) internal successors, (917), 311 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:33,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 917 transitions. [2021-03-10 22:06:33,428 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 917 transitions. Word has length 20 [2021-03-10 22:06:33,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:33,428 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 917 transitions. [2021-03-10 22:06:33,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:33,428 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 917 transitions. [2021-03-10 22:06:33,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:33,428 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:33,428 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:33,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5235 [2021-03-10 22:06:33,629 INFO L428 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:33,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:33,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1499321099, now seen corresponding path program 588 times [2021-03-10 22:06:33,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:33,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458379685] [2021-03-10 22:06:33,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:33,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458379685] [2021-03-10 22:06:33,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643032791] [2021-03-10 22:06:33,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:33,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:06:33,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:33,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:33,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:33,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:33,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:06:33,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621723541] [2021-03-10 22:06:33,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:06:33,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:33,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:06:33,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:06:33,860 INFO L87 Difference]: Start difference. First operand 312 states and 917 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:34,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:34,112 INFO L93 Difference]: Finished difference Result 493 states and 1389 transitions. [2021-03-10 22:06:34,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:34,112 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:34,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:34,113 INFO L225 Difference]: With dead ends: 493 [2021-03-10 22:06:34,113 INFO L226 Difference]: Without dead ends: 493 [2021-03-10 22:06:34,113 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 220.1ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:34,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-03-10 22:06:34,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 310. [2021-03-10 22:06:34,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9514563106796117) internal successors, (912), 309 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:34,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 912 transitions. [2021-03-10 22:06:34,117 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 912 transitions. Word has length 20 [2021-03-10 22:06:34,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:34,117 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 912 transitions. [2021-03-10 22:06:34,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:34,117 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 912 transitions. [2021-03-10 22:06:34,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:06:34,117 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:34,117 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:34,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5246,591 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:34,318 INFO L428 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:34,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:34,318 INFO L82 PathProgramCache]: Analyzing trace with hash 260731841, now seen corresponding path program 589 times [2021-03-10 22:06:34,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:34,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863395560] [2021-03-10 22:06:34,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:34,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863395560] [2021-03-10 22:06:34,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30196592] [2021-03-10 22:06:34,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:34,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 22:06:34,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:34,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:34,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:34,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:06:34,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184880738] [2021-03-10 22:06:34,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:06:34,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:34,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:06:34,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:06:34,532 INFO L87 Difference]: Start difference. First operand 310 states and 912 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:34,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:34,781 INFO L93 Difference]: Finished difference Result 483 states and 1362 transitions. [2021-03-10 22:06:34,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:34,782 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:06:34,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:34,782 INFO L225 Difference]: With dead ends: 483 [2021-03-10 22:06:34,782 INFO L226 Difference]: Without dead ends: 483 [2021-03-10 22:06:34,782 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 199.7ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:06:34,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-03-10 22:06:34,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 294. [2021-03-10 22:06:34,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.955631399317406) internal successors, (866), 293 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:34,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2021-03-10 22:06:34,786 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2021-03-10 22:06:34,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:34,786 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2021-03-10 22:06:34,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:34,786 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2021-03-10 22:06:34,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:06:34,786 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:34,786 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:34,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5249,592 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:34,986 INFO L428 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:34,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:34,987 INFO L82 PathProgramCache]: Analyzing trace with hash 2020715594, now seen corresponding path program 590 times [2021-03-10 22:06:34,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:34,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739988955] [2021-03-10 22:06:34,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:34,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:35,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:35,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739988955] [2021-03-10 22:06:35,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826431594] [2021-03-10 22:06:35,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:35,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:35,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:35,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 22:06:35,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:35,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:35,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:35,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:06:35,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:06:35,402 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,404 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:35,405 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,407 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:35,408 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,410 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:35,411 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,446 INFO L628 ElimStorePlain]: treesize reduction 13, result has 74.5 percent of original size [2021-03-10 22:06:35,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:35,447 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:163, output treesize:38 [2021-03-10 22:06:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:35,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:35,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 22:06:35,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732916927] [2021-03-10 22:06:35,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:35,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:35,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:35,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:35,519 INFO L87 Difference]: Start difference. First operand 294 states and 866 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:36,660 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-03-10 22:06:36,959 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-03-10 22:06:37,085 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-10 22:06:37,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:37,193 INFO L93 Difference]: Finished difference Result 879 states and 2547 transitions. [2021-03-10 22:06:37,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:06:37,193 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:06:37,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:37,194 INFO L225 Difference]: With dead ends: 879 [2021-03-10 22:06:37,194 INFO L226 Difference]: Without dead ends: 780 [2021-03-10 22:06:37,194 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1431.3ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:06:37,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-03-10 22:06:37,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 370. [2021-03-10 22:06:37,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.037940379403794) internal successors, (1121), 369 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:37,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1121 transitions. [2021-03-10 22:06:37,199 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1121 transitions. Word has length 21 [2021-03-10 22:06:37,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:37,199 INFO L480 AbstractCegarLoop]: Abstraction has 370 states and 1121 transitions. [2021-03-10 22:06:37,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:37,199 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1121 transitions. [2021-03-10 22:06:37,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:06:37,200 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:37,200 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:37,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5251,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:37,400 INFO L428 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:37,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:37,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1242995883, now seen corresponding path program 1 times [2021-03-10 22:06:37,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:37,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760311080] [2021-03-10 22:06:37,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:37,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760311080] [2021-03-10 22:06:37,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371388553] [2021-03-10 22:06:37,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:37,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:06:37,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:37,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:06:37,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:37,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:06:37,728 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:37,731 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:37,732 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:37,734 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:37,735 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:37,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:37,738 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:37,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:06:37,741 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:37,780 INFO L628 ElimStorePlain]: treesize reduction 15, result has 73.2 percent of original size [2021-03-10 22:06:37,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:37,781 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:128, output treesize:41 [2021-03-10 22:06:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:06:37,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:37,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-03-10 22:06:37,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207322545] [2021-03-10 22:06:37,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:37,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:37,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:37,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:37,848 INFO L87 Difference]: Start difference. First operand 370 states and 1121 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:38,547 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 22:06:38,832 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-03-10 22:06:38,977 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-03-10 22:06:39,193 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-03-10 22:06:39,355 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-03-10 22:06:39,640 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-03-10 22:06:39,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:39,692 INFO L93 Difference]: Finished difference Result 727 states and 2041 transitions. [2021-03-10 22:06:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:06:39,692 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:06:39,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:39,693 INFO L225 Difference]: With dead ends: 727 [2021-03-10 22:06:39,693 INFO L226 Difference]: Without dead ends: 588 [2021-03-10 22:06:39,693 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1738.9ms TimeCoverageRelationStatistics Valid=236, Invalid=820, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:06:39,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-03-10 22:06:39,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 414. [2021-03-10 22:06:39,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.9685230024213074) internal successors, (1226), 413 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1226 transitions. [2021-03-10 22:06:39,697 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1226 transitions. Word has length 21 [2021-03-10 22:06:39,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:39,697 INFO L480 AbstractCegarLoop]: Abstraction has 414 states and 1226 transitions. [2021-03-10 22:06:39,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:39,698 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1226 transitions. [2021-03-10 22:06:39,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:06:39,698 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:39,698 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:39,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 594 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5266 [2021-03-10 22:06:39,898 INFO L428 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:39,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:39,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1157086666, now seen corresponding path program 591 times [2021-03-10 22:06:39,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:39,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551989070] [2021-03-10 22:06:39,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:40,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:40,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551989070] [2021-03-10 22:06:40,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086389433] [2021-03-10 22:06:40,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:40,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:06:40,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:40,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 22:06:40,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:40,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:40,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:40,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-03-10 22:06:40,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:06:40,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:40,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:40,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-03-10 22:06:40,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:40,671 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,674 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:40,674 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:40,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:40,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:06:40,695 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,698 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:40,698 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:40,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-03-10 22:06:40,703 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,794 INFO L628 ElimStorePlain]: treesize reduction 30, result has 75.6 percent of original size [2021-03-10 22:06:40,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:06:40,797 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:295, output treesize:49 [2021-03-10 22:06:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:40,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:40,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-10 22:06:40,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385199290] [2021-03-10 22:06:40,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:06:40,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:40,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:06:40,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:06:40,895 INFO L87 Difference]: Start difference. First operand 414 states and 1226 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:41,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:41,767 INFO L93 Difference]: Finished difference Result 638 states and 1876 transitions. [2021-03-10 22:06:41,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:06:41,768 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:06:41,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:41,768 INFO L225 Difference]: With dead ends: 638 [2021-03-10 22:06:41,768 INFO L226 Difference]: Without dead ends: 605 [2021-03-10 22:06:41,769 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 785.9ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:06:41,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-03-10 22:06:41,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 427. [2021-03-10 22:06:41,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 2.995305164319249) internal successors, (1276), 426 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:41,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1276 transitions. [2021-03-10 22:06:41,774 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1276 transitions. Word has length 21 [2021-03-10 22:06:41,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:41,774 INFO L480 AbstractCegarLoop]: Abstraction has 427 states and 1276 transitions. [2021-03-10 22:06:41,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:41,774 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1276 transitions. [2021-03-10 22:06:41,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:06:41,774 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:41,774 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:41,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5278 [2021-03-10 22:06:41,975 INFO L428 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:41,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:41,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1698401856, now seen corresponding path program 592 times [2021-03-10 22:06:41,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:41,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035725587] [2021-03-10 22:06:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:42,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035725587] [2021-03-10 22:06:42,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919396958] [2021-03-10 22:06:42,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:42,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:42,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:42,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:42,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:42,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:42,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:42,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:06:42,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:42,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:42,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:06:42,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:42,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:42,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:06:42,693 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:42,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:42,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-03-10 22:06:42,699 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:42,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:42,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-03-10 22:06:42,705 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:42,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:06:42,709 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:42,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:42,755 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:255, output treesize:48 [2021-03-10 22:06:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:42,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:42,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-03-10 22:06:42,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504352235] [2021-03-10 22:06:42,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:06:42,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:42,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:06:42,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:06:42,922 INFO L87 Difference]: Start difference. First operand 427 states and 1276 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:43,385 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-03-10 22:06:43,574 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-03-10 22:06:44,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:44,357 INFO L93 Difference]: Finished difference Result 697 states and 2029 transitions. [2021-03-10 22:06:44,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:06:44,358 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:06:44,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:44,358 INFO L225 Difference]: With dead ends: 697 [2021-03-10 22:06:44,359 INFO L226 Difference]: Without dead ends: 642 [2021-03-10 22:06:44,359 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1282.6ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:06:44,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-03-10 22:06:44,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 422. [2021-03-10 22:06:44,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.983372921615202) internal successors, (1256), 421 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:44,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1256 transitions. [2021-03-10 22:06:44,363 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1256 transitions. Word has length 21 [2021-03-10 22:06:44,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:44,363 INFO L480 AbstractCegarLoop]: Abstraction has 422 states and 1256 transitions. [2021-03-10 22:06:44,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:44,363 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1256 transitions. [2021-03-10 22:06:44,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:06:44,364 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:44,364 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:44,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 596 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5343 [2021-03-10 22:06:44,564 INFO L428 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:44,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:44,565 INFO L82 PathProgramCache]: Analyzing trace with hash -777988342, now seen corresponding path program 593 times [2021-03-10 22:06:44,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:44,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688585489] [2021-03-10 22:06:44,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:44,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:44,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688585489] [2021-03-10 22:06:44,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084885310] [2021-03-10 22:06:44,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:44,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:06:44,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:44,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:44,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:45,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:45,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:45,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-03-10 22:06:45,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:45,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:45,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:45,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:06:45,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:45,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:45,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:45,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:06:45,297 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:45,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:45,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:45,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-03-10 22:06:45,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:45,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:45,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:45,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:06:45,310 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:45,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:45,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:45,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-03-10 22:06:45,316 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:45,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:45,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:45,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:06:45,322 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:45,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:45,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:45,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:06:45,328 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:45,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:45,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:45,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-03-10 22:06:45,335 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:45,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:45,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:45,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-03-10 22:06:45,341 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:45,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:45,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:45,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:06:45,347 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:45,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:45,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:06:45,354 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:45,547 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-03-10 22:06:45,547 INFO L628 ElimStorePlain]: treesize reduction 80, result has 69.3 percent of original size [2021-03-10 22:06:45,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:06:45,549 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:630, output treesize:101 [2021-03-10 22:06:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:45,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:45,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-03-10 22:06:45,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692384705] [2021-03-10 22:06:45,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:06:45,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:45,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:06:45,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:06:45,886 INFO L87 Difference]: Start difference. First operand 422 states and 1256 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:46,664 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-10 22:06:46,990 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 22:06:47,187 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-10 22:06:47,321 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-03-10 22:06:47,550 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-10 22:06:47,778 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-03-10 22:06:48,092 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-03-10 22:06:48,276 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-03-10 22:06:48,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:48,309 INFO L93 Difference]: Finished difference Result 730 states and 2075 transitions. [2021-03-10 22:06:48,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:06:48,310 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:06:48,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:48,311 INFO L225 Difference]: With dead ends: 730 [2021-03-10 22:06:48,311 INFO L226 Difference]: Without dead ends: 620 [2021-03-10 22:06:48,311 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2428.1ms TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:06:48,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-03-10 22:06:48,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 432. [2021-03-10 22:06:48,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.0069605568445477) internal successors, (1296), 431 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:48,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1296 transitions. [2021-03-10 22:06:48,315 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1296 transitions. Word has length 21 [2021-03-10 22:06:48,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:48,315 INFO L480 AbstractCegarLoop]: Abstraction has 432 states and 1296 transitions. [2021-03-10 22:06:48,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:48,316 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1296 transitions. [2021-03-10 22:06:48,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:06:48,316 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:48,316 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:48,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5378 [2021-03-10 22:06:48,516 INFO L428 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:48,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:48,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1120947862, now seen corresponding path program 594 times [2021-03-10 22:06:48,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:48,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235301787] [2021-03-10 22:06:48,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:48,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235301787] [2021-03-10 22:06:48,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475363513] [2021-03-10 22:06:48,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:48,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:06:48,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:48,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 22:06:48,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:49,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:06:49,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:49,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:06:49,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:49,105 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:49,106 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:49,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:49,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:49,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:06:49,111 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:49,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:49,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:49,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-03-10 22:06:49,116 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:49,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:49,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-03-10 22:06:49,121 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:49,205 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.9 percent of original size [2021-03-10 22:06:49,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:06:49,207 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:213, output treesize:49 [2021-03-10 22:06:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:49,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:49,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:06:49,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291933926] [2021-03-10 22:06:49,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:06:49,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:49,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:06:49,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:06:49,299 INFO L87 Difference]: Start difference. First operand 432 states and 1296 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:50,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:50,053 INFO L93 Difference]: Finished difference Result 657 states and 1942 transitions. [2021-03-10 22:06:50,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:06:50,054 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:06:50,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:50,054 INFO L225 Difference]: With dead ends: 657 [2021-03-10 22:06:50,054 INFO L226 Difference]: Without dead ends: 624 [2021-03-10 22:06:50,055 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 663.9ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:06:50,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-03-10 22:06:50,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 440. [2021-03-10 22:06:50,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.020501138952164) internal successors, (1326), 439 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:50,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1326 transitions. [2021-03-10 22:06:50,059 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1326 transitions. Word has length 21 [2021-03-10 22:06:50,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:50,059 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 1326 transitions. [2021-03-10 22:06:50,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:50,060 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1326 transitions. [2021-03-10 22:06:50,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:06:50,060 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:50,060 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:50,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5418,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:50,271 INFO L428 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:50,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:50,271 INFO L82 PathProgramCache]: Analyzing trace with hash 697629236, now seen corresponding path program 595 times [2021-03-10 22:06:50,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:50,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160585529] [2021-03-10 22:06:50,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:50,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160585529] [2021-03-10 22:06:50,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819503455] [2021-03-10 22:06:50,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:50,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:50,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:51,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:51,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:51,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:06:51,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:51,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:51,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:51,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:06:51,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:51,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:51,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:51,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-03-10 22:06:51,052 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:51,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:51,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:51,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-03-10 22:06:51,058 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:51,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:51,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:51,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:06:51,065 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:51,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:51,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:51,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:06:51,071 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:51,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:51,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:51,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-03-10 22:06:51,078 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:51,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:51,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:51,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:06:51,085 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:51,089 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:51,090 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:51,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:51,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:51,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:06:51,096 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:51,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:51,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:51,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-03-10 22:06:51,102 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:51,106 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:51,106 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:51,249 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-03-10 22:06:51,250 INFO L628 ElimStorePlain]: treesize reduction 127, result has 51.9 percent of original size [2021-03-10 22:06:51,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:06:51,252 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:604, output treesize:73 [2021-03-10 22:06:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:51,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:51,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-03-10 22:06:51,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831525701] [2021-03-10 22:06:51,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:51,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:51,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:51,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:51,479 INFO L87 Difference]: Start difference. First operand 440 states and 1326 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:52,551 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-03-10 22:06:52,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:52,778 INFO L93 Difference]: Finished difference Result 813 states and 2346 transitions. [2021-03-10 22:06:52,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:06:52,778 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:06:52,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:52,779 INFO L225 Difference]: With dead ends: 813 [2021-03-10 22:06:52,779 INFO L226 Difference]: Without dead ends: 725 [2021-03-10 22:06:52,779 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1192.6ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:06:52,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-03-10 22:06:52,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 455. [2021-03-10 22:06:52,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.063876651982379) internal successors, (1391), 454 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:52,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1391 transitions. [2021-03-10 22:06:52,785 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1391 transitions. Word has length 21 [2021-03-10 22:06:52,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:52,785 INFO L480 AbstractCegarLoop]: Abstraction has 455 states and 1391 transitions. [2021-03-10 22:06:52,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1391 transitions. [2021-03-10 22:06:52,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:06:52,785 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:52,785 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:52,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5457,599 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:52,986 INFO L428 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:52,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:52,986 INFO L82 PathProgramCache]: Analyzing trace with hash -363148854, now seen corresponding path program 596 times [2021-03-10 22:06:52,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:52,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842366537] [2021-03-10 22:06:52,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:53,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842366537] [2021-03-10 22:06:53,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37284069] [2021-03-10 22:06:53,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:53,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:53,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:53,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:53,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:53,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:53,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:53,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:06:53,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:53,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:53,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:06:53,578 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:53,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:53,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:06:53,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:53,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:53,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-03-10 22:06:53,591 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:53,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:53,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-03-10 22:06:53,599 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:53,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:53,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:06:53,606 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:53,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:53,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:06:53,612 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:53,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:53,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:06:53,620 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,624 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:53,625 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:53,629 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:53,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:53,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-03-10 22:06:53,635 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:53,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-03-10 22:06:53,641 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,799 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-03-10 22:06:53,799 INFO L628 ElimStorePlain]: treesize reduction 41, result has 80.5 percent of original size [2021-03-10 22:06:53,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:06:53,801 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:626, output treesize:89 [2021-03-10 22:06:54,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:54,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:54,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-03-10 22:06:54,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133807489] [2021-03-10 22:06:54,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:54,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:54,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:54,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:54,035 INFO L87 Difference]: Start difference. First operand 455 states and 1391 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:54,439 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 22:06:54,842 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-03-10 22:06:54,997 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-03-10 22:06:55,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:55,229 INFO L93 Difference]: Finished difference Result 829 states and 2390 transitions. [2021-03-10 22:06:55,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:06:55,229 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:06:55,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:55,230 INFO L225 Difference]: With dead ends: 829 [2021-03-10 22:06:55,230 INFO L226 Difference]: Without dead ends: 759 [2021-03-10 22:06:55,230 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1167.9ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:06:55,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-03-10 22:06:55,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 484. [2021-03-10 22:06:55,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.0848861283643894) internal successors, (1490), 483 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:55,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1490 transitions. [2021-03-10 22:06:55,236 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1490 transitions. Word has length 21 [2021-03-10 22:06:55,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:55,236 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 1490 transitions. [2021-03-10 22:06:55,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:55,236 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1490 transitions. [2021-03-10 22:06:55,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:06:55,236 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:55,236 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:55,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5577,600 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:55,437 INFO L428 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:55,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:55,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1269902538, now seen corresponding path program 597 times [2021-03-10 22:06:55,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:55,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775537525] [2021-03-10 22:06:55,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:55,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775537525] [2021-03-10 22:06:55,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103039369] [2021-03-10 22:06:55,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:55,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:06:55,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:55,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:55,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:56,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-03-10 22:06:56,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:06:56,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:06:56,210 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,214 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:56,215 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:06:56,222 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:06:56,230 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:06:56,237 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-03-10 22:06:56,243 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,247 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:56,248 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-03-10 22:06:56,254 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:06:56,261 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:06:56,266 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,428 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-03-10 22:06:56,428 INFO L628 ElimStorePlain]: treesize reduction 34, result has 83.3 percent of original size [2021-03-10 22:06:56,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:06:56,430 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:620, output treesize:89 [2021-03-10 22:06:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:56,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:56,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-10 22:06:56,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826398382] [2021-03-10 22:06:56,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:06:56,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:56,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:06:56,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:56,756 INFO L87 Difference]: Start difference. First operand 484 states and 1490 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:57,208 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-03-10 22:06:57,464 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-03-10 22:06:57,625 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-03-10 22:06:57,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:57,792 INFO L93 Difference]: Finished difference Result 822 states and 2366 transitions. [2021-03-10 22:06:57,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:06:57,793 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:06:57,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:57,794 INFO L225 Difference]: With dead ends: 822 [2021-03-10 22:06:57,794 INFO L226 Difference]: Without dead ends: 807 [2021-03-10 22:06:57,794 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1032.5ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:06:57,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-03-10 22:06:57,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 487. [2021-03-10 22:06:57,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.096707818930041) internal successors, (1505), 486 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1505 transitions. [2021-03-10 22:06:57,800 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1505 transitions. Word has length 21 [2021-03-10 22:06:57,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:57,800 INFO L480 AbstractCegarLoop]: Abstraction has 487 states and 1505 transitions. [2021-03-10 22:06:57,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:57,800 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1505 transitions. [2021-03-10 22:06:57,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:06:57,801 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:57,801 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:58,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5614,601 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:58,001 INFO L428 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:58,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:58,001 INFO L82 PathProgramCache]: Analyzing trace with hash -687234418, now seen corresponding path program 598 times [2021-03-10 22:06:58,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:58,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707857087] [2021-03-10 22:06:58,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:58,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:58,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707857087] [2021-03-10 22:06:58,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344649636] [2021-03-10 22:06:58,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:58,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:58,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:58,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:06:58,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:58,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:58,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:58,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:06:58,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:58,633 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:58,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:58,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:58,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:58,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-03-10 22:06:58,641 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:58,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:58,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:58,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:06:58,647 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:58,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:58,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:58,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:06:58,653 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:58,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:58,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:58,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:06:58,660 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:58,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:58,664 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:58,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:58,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:58,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:06:58,670 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:58,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:58,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:06:58,675 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:58,812 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-03-10 22:06:58,812 INFO L628 ElimStorePlain]: treesize reduction 46, result has 76.0 percent of original size [2021-03-10 22:06:58,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:06:58,814 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:457, output treesize:82 [2021-03-10 22:06:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:58,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:58,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:06:58,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934296680] [2021-03-10 22:06:58,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:06:58,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:58,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:06:58,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:06:58,991 INFO L87 Difference]: Start difference. First operand 487 states and 1505 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:59,391 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 22:06:59,579 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-03-10 22:06:59,914 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-10 22:06:59,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:59,922 INFO L93 Difference]: Finished difference Result 805 states and 2340 transitions. [2021-03-10 22:06:59,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:06:59,922 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:06:59,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:59,923 INFO L225 Difference]: With dead ends: 805 [2021-03-10 22:06:59,923 INFO L226 Difference]: Without dead ends: 765 [2021-03-10 22:06:59,923 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 975.6ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:06:59,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-03-10 22:06:59,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 484. [2021-03-10 22:06:59,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.082815734989648) internal successors, (1489), 483 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:59,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1489 transitions. [2021-03-10 22:06:59,929 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1489 transitions. Word has length 21 [2021-03-10 22:06:59,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:59,929 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 1489 transitions. [2021-03-10 22:06:59,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:59,929 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1489 transitions. [2021-03-10 22:06:59,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:06:59,930 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:59,930 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:00,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5664,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:00,130 INFO L428 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:00,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:00,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1917789974, now seen corresponding path program 599 times [2021-03-10 22:07:00,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:00,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660138215] [2021-03-10 22:07:00,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:00,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660138215] [2021-03-10 22:07:00,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001865290] [2021-03-10 22:07:00,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:00,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:07:00,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:00,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:00,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:00,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:07:00,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:07:00,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:07:00,576 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:07:00,582 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:07:00,586 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:07:00,589 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,641 INFO L628 ElimStorePlain]: treesize reduction 18, result has 76.3 percent of original size [2021-03-10 22:07:00,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:07:00,642 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:166, output treesize:58 [2021-03-10 22:07:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:00,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:00,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:07:00,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954638865] [2021-03-10 22:07:00,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:07:00,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:00,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:07:00,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:07:00,878 INFO L87 Difference]: Start difference. First operand 484 states and 1489 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:01,468 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 22:07:01,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:01,714 INFO L93 Difference]: Finished difference Result 789 states and 2294 transitions. [2021-03-10 22:07:01,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:07:01,715 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:01,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:01,716 INFO L225 Difference]: With dead ends: 789 [2021-03-10 22:07:01,716 INFO L226 Difference]: Without dead ends: 774 [2021-03-10 22:07:01,716 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 878.7ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:07:01,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-03-10 22:07:01,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 482. [2021-03-10 22:07:01,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.076923076923077) internal successors, (1480), 481 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:01,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1480 transitions. [2021-03-10 22:07:01,722 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1480 transitions. Word has length 21 [2021-03-10 22:07:01,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:01,722 INFO L480 AbstractCegarLoop]: Abstraction has 482 states and 1480 transitions. [2021-03-10 22:07:01,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:01,722 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1480 transitions. [2021-03-10 22:07:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:01,722 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:01,722 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:01,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5700,603 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:01,923 INFO L428 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:01,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:01,923 INFO L82 PathProgramCache]: Analyzing trace with hash -66900876, now seen corresponding path program 600 times [2021-03-10 22:07:01,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:01,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909050182] [2021-03-10 22:07:01,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:02,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:02,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909050182] [2021-03-10 22:07:02,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842894138] [2021-03-10 22:07:02,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:02,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:07:02,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:02,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:07:02,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:02,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:07:02,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:02,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:07:02,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:02,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:07:02,427 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:02,429 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:02,429 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:02,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:07:02,432 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:02,455 INFO L628 ElimStorePlain]: treesize reduction 16, result has 65.2 percent of original size [2021-03-10 22:07:02,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:07:02,456 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:122, output treesize:30 [2021-03-10 22:07:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:02,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:02,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-03-10 22:07:02,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819774381] [2021-03-10 22:07:02,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:07:02,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:02,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:07:02,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:07:02,518 INFO L87 Difference]: Start difference. First operand 482 states and 1480 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:03,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:03,580 INFO L93 Difference]: Finished difference Result 895 states and 2624 transitions. [2021-03-10 22:07:03,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:07:03,580 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:03,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:03,581 INFO L225 Difference]: With dead ends: 895 [2021-03-10 22:07:03,581 INFO L226 Difference]: Without dead ends: 818 [2021-03-10 22:07:03,582 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 982.3ms TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:07:03,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-03-10 22:07:03,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 475. [2021-03-10 22:07:03,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 3.107594936708861) internal successors, (1473), 474 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:03,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1473 transitions. [2021-03-10 22:07:03,587 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1473 transitions. Word has length 21 [2021-03-10 22:07:03,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:03,587 INFO L480 AbstractCegarLoop]: Abstraction has 475 states and 1473 transitions. [2021-03-10 22:07:03,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:03,587 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1473 transitions. [2021-03-10 22:07:03,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:03,588 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:03,588 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:03,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5717,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:03,788 INFO L428 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:03,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:03,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1068676273, now seen corresponding path program 2 times [2021-03-10 22:07:03,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:03,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54916095] [2021-03-10 22:07:03,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:03,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54916095] [2021-03-10 22:07:03,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849706041] [2021-03-10 22:07:03,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:04,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:04,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:04,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:07:04,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:04,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:07:04,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:07:04,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:07:04,123 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,142 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-03-10 22:07:04,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:07:04,143 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-03-10 22:07:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:04,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:04,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-03-10 22:07:04,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615285100] [2021-03-10 22:07:04,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:04,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:04,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:04,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:04,190 INFO L87 Difference]: Start difference. First operand 475 states and 1473 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:05,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:05,461 INFO L93 Difference]: Finished difference Result 1086 states and 3214 transitions. [2021-03-10 22:07:05,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:07:05,461 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:05,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:05,462 INFO L225 Difference]: With dead ends: 1086 [2021-03-10 22:07:05,462 INFO L226 Difference]: Without dead ends: 932 [2021-03-10 22:07:05,462 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 809.9ms TimeCoverageRelationStatistics Valid=235, Invalid=1171, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 22:07:05,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-03-10 22:07:05,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 542. [2021-03-10 22:07:05,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.192236598890943) internal successors, (1727), 541 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:05,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1727 transitions. [2021-03-10 22:07:05,469 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1727 transitions. Word has length 21 [2021-03-10 22:07:05,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:05,469 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1727 transitions. [2021-03-10 22:07:05,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:05,469 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1727 transitions. [2021-03-10 22:07:05,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:05,469 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:05,469 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:05,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5731,605 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:05,670 INFO L428 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:05,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:05,670 INFO L82 PathProgramCache]: Analyzing trace with hash -307632639, now seen corresponding path program 3 times [2021-03-10 22:07:05,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:05,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563475249] [2021-03-10 22:07:05,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:05,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563475249] [2021-03-10 22:07:05,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968977032] [2021-03-10 22:07:05,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:05,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:07:05,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:05,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:07:05,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:06,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:07:06,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:07:06,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:07:06,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,116 INFO L628 ElimStorePlain]: treesize reduction 13, result has 51.9 percent of original size [2021-03-10 22:07:06,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:07:06,117 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:51, output treesize:14 [2021-03-10 22:07:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:07:06,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:06,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 22:07:06,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100253169] [2021-03-10 22:07:06,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:07:06,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:06,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:07:06,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:07:06,166 INFO L87 Difference]: Start difference. First operand 542 states and 1727 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:07,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:07,141 INFO L93 Difference]: Finished difference Result 925 states and 2774 transitions. [2021-03-10 22:07:07,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:07:07,141 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:07,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:07,142 INFO L225 Difference]: With dead ends: 925 [2021-03-10 22:07:07,142 INFO L226 Difference]: Without dead ends: 857 [2021-03-10 22:07:07,142 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 958.0ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:07:07,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-03-10 22:07:07,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 555. [2021-03-10 22:07:07,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 3.203971119133574) internal successors, (1775), 554 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:07,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1775 transitions. [2021-03-10 22:07:07,149 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1775 transitions. Word has length 21 [2021-03-10 22:07:07,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:07,149 INFO L480 AbstractCegarLoop]: Abstraction has 555 states and 1775 transitions. [2021-03-10 22:07:07,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:07,149 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1775 transitions. [2021-03-10 22:07:07,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:07,150 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:07,150 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:07,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5736,606 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:07,350 INFO L428 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:07,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:07,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1601256757, now seen corresponding path program 4 times [2021-03-10 22:07:07,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:07,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505995486] [2021-03-10 22:07:07,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:07,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:07,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505995486] [2021-03-10 22:07:07,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781806792] [2021-03-10 22:07:07,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:07,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:07:07,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:07,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 22:07:07,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:07,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:07:07,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:07,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:07:07,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:07,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:07:07,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:07,806 INFO L628 ElimStorePlain]: treesize reduction 14, result has 66.7 percent of original size [2021-03-10 22:07:07,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:07:07,806 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:73, output treesize:28 [2021-03-10 22:07:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:07,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:07,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:07:07,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616398347] [2021-03-10 22:07:07,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:07:07,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:07,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:07:07,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:07:07,888 INFO L87 Difference]: Start difference. First operand 555 states and 1775 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:08,581 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-03-10 22:07:09,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:09,175 INFO L93 Difference]: Finished difference Result 1087 states and 3213 transitions. [2021-03-10 22:07:09,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:07:09,176 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:09,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:09,177 INFO L225 Difference]: With dead ends: 1087 [2021-03-10 22:07:09,177 INFO L226 Difference]: Without dead ends: 972 [2021-03-10 22:07:09,177 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1195.8ms TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:07:09,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-03-10 22:07:09,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 568. [2021-03-10 22:07:09,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 3.2186948853615522) internal successors, (1825), 567 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:09,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 1825 transitions. [2021-03-10 22:07:09,185 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 1825 transitions. Word has length 21 [2021-03-10 22:07:09,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:09,185 INFO L480 AbstractCegarLoop]: Abstraction has 568 states and 1825 transitions. [2021-03-10 22:07:09,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:09,185 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 1825 transitions. [2021-03-10 22:07:09,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:09,185 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:09,185 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:09,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5748 [2021-03-10 22:07:09,386 INFO L428 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:09,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:09,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1831744669, now seen corresponding path program 5 times [2021-03-10 22:07:09,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:09,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830145347] [2021-03-10 22:07:09,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:09,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830145347] [2021-03-10 22:07:09,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753833719] [2021-03-10 22:07:09,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:09,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:09,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:09,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:07:09,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:09,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:07:09,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:09,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:07:09,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:09,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:07:09,723 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:09,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:07:09,727 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:09,729 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:09,729 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:09,772 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-03-10 22:07:09,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:07:09,773 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-03-10 22:07:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:09,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:09,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-03-10 22:07:09,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394215883] [2021-03-10 22:07:09,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:09,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:09,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:09,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:09,868 INFO L87 Difference]: Start difference. First operand 568 states and 1825 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:10,674 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-10 22:07:10,994 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-10 22:07:12,337 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-03-10 22:07:12,578 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-03-10 22:07:12,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:12,595 INFO L93 Difference]: Finished difference Result 1902 states and 5535 transitions. [2021-03-10 22:07:12,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 22:07:12,596 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:12,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:12,598 INFO L225 Difference]: With dead ends: 1902 [2021-03-10 22:07:12,598 INFO L226 Difference]: Without dead ends: 1678 [2021-03-10 22:07:12,598 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 2144.6ms TimeCoverageRelationStatistics Valid=393, Invalid=1863, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 22:07:12,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2021-03-10 22:07:12,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 650. [2021-03-10 22:07:12,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 3.342064714946071) internal successors, (2169), 649 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:12,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 2169 transitions. [2021-03-10 22:07:12,608 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 2169 transitions. Word has length 21 [2021-03-10 22:07:12,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:12,608 INFO L480 AbstractCegarLoop]: Abstraction has 650 states and 2169 transitions. [2021-03-10 22:07:12,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:12,608 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 2169 transitions. [2021-03-10 22:07:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:12,609 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:12,609 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:12,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5761 [2021-03-10 22:07:12,810 INFO L428 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:12,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:12,810 INFO L82 PathProgramCache]: Analyzing trace with hash 688457709, now seen corresponding path program 6 times [2021-03-10 22:07:12,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:12,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541142246] [2021-03-10 22:07:12,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:12,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541142246] [2021-03-10 22:07:12,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020071331] [2021-03-10 22:07:12,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:13,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:07:13,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:13,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:07:13,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:13,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:07:13,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:13,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:07:13,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:13,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:07:13,223 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:13,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:07:13,227 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:13,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:07:13,230 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:13,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:07:13,233 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:13,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:07:13,237 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:13,285 INFO L628 ElimStorePlain]: treesize reduction 57, result has 40.6 percent of original size [2021-03-10 22:07:13,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:07:13,286 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:163, output treesize:39 [2021-03-10 22:07:13,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:13,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:13,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 22:07:13,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877163131] [2021-03-10 22:07:13,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:07:13,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:13,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:07:13,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:07:13,403 INFO L87 Difference]: Start difference. First operand 650 states and 2169 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:14,063 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-03-10 22:07:14,219 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-03-10 22:07:14,371 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-03-10 22:07:14,656 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-03-10 22:07:14,841 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-10 22:07:14,970 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-10 22:07:15,161 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-03-10 22:07:15,295 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 22:07:15,473 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-03-10 22:07:15,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:15,474 INFO L93 Difference]: Finished difference Result 1197 states and 3677 transitions. [2021-03-10 22:07:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:07:15,474 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:15,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:15,476 INFO L225 Difference]: With dead ends: 1197 [2021-03-10 22:07:15,476 INFO L226 Difference]: Without dead ends: 1155 [2021-03-10 22:07:15,476 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1930.1ms TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:07:15,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-03-10 22:07:15,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 652. [2021-03-10 22:07:15,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 3.3548387096774195) internal successors, (2184), 651 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:15,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 2184 transitions. [2021-03-10 22:07:15,485 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 2184 transitions. Word has length 21 [2021-03-10 22:07:15,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:15,485 INFO L480 AbstractCegarLoop]: Abstraction has 652 states and 2184 transitions. [2021-03-10 22:07:15,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:15,485 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 2184 transitions. [2021-03-10 22:07:15,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:15,485 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:15,485 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:15,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5769 [2021-03-10 22:07:15,686 INFO L428 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:15,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:15,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1117694257, now seen corresponding path program 7 times [2021-03-10 22:07:15,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:15,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582675348] [2021-03-10 22:07:15,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:15,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582675348] [2021-03-10 22:07:15,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837642744] [2021-03-10 22:07:15,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:15,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:07:15,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:16,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:07:16,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:16,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:07:16,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:16,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:07:16,033 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:16,055 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-03-10 22:07:16,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:07:16,056 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-03-10 22:07:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:16,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:16,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-03-10 22:07:16,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417724404] [2021-03-10 22:07:16,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:16,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:16,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:16,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:16,105 INFO L87 Difference]: Start difference. First operand 652 states and 2184 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:17,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:17,328 INFO L93 Difference]: Finished difference Result 1196 states and 3783 transitions. [2021-03-10 22:07:17,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:07:17,329 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:17,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:17,330 INFO L225 Difference]: With dead ends: 1196 [2021-03-10 22:07:17,330 INFO L226 Difference]: Without dead ends: 1069 [2021-03-10 22:07:17,330 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 693.9ms TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:07:17,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-03-10 22:07:17,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 689. [2021-03-10 22:07:17,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 3.4040697674418605) internal successors, (2342), 688 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:17,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 2342 transitions. [2021-03-10 22:07:17,339 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 2342 transitions. Word has length 21 [2021-03-10 22:07:17,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:17,339 INFO L480 AbstractCegarLoop]: Abstraction has 689 states and 2342 transitions. [2021-03-10 22:07:17,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:17,339 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 2342 transitions. [2021-03-10 22:07:17,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:17,340 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:17,340 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:17,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5788,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:17,540 INFO L428 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:17,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:17,541 INFO L82 PathProgramCache]: Analyzing trace with hash -409336039, now seen corresponding path program 8 times [2021-03-10 22:07:17,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:17,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576349447] [2021-03-10 22:07:17,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:17,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576349447] [2021-03-10 22:07:17,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579574103] [2021-03-10 22:07:17,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:17,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:17,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:17,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:07:17,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:17,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:07:17,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:17,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:07:17,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:17,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:07:17,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:17,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:07:17,844 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:17,845 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:17,846 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:17,894 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-03-10 22:07:17,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:07:17,895 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-03-10 22:07:17,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:17,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:17,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-03-10 22:07:17,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365702642] [2021-03-10 22:07:17,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:17,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:17,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:17,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:17,978 INFO L87 Difference]: Start difference. First operand 689 states and 2342 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:19,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:19,304 INFO L93 Difference]: Finished difference Result 1436 states and 4450 transitions. [2021-03-10 22:07:19,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:07:19,304 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:19,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:19,306 INFO L225 Difference]: With dead ends: 1436 [2021-03-10 22:07:19,306 INFO L226 Difference]: Without dead ends: 1267 [2021-03-10 22:07:19,306 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 826.4ms TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:07:19,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-03-10 22:07:19,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 693. [2021-03-10 22:07:19,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 3.398843930635838) internal successors, (2352), 692 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:19,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 2352 transitions. [2021-03-10 22:07:19,315 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 2352 transitions. Word has length 21 [2021-03-10 22:07:19,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:19,315 INFO L480 AbstractCegarLoop]: Abstraction has 693 states and 2352 transitions. [2021-03-10 22:07:19,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:19,315 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 2352 transitions. [2021-03-10 22:07:19,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:19,316 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:19,316 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:19,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 611 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5793 [2021-03-10 22:07:19,516 INFO L428 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:19,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:19,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1778847137, now seen corresponding path program 9 times [2021-03-10 22:07:19,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:19,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56147003] [2021-03-10 22:07:19,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:19,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:19,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56147003] [2021-03-10 22:07:19,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508460298] [2021-03-10 22:07:19,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:19,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:07:19,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:19,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:07:19,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:19,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:07:19,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:07:19,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,909 INFO L628 ElimStorePlain]: treesize reduction 12, result has 62.5 percent of original size [2021-03-10 22:07:19,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:07:19,910 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:43, output treesize:20 [2021-03-10 22:07:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:07:19,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:19,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-03-10 22:07:19,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621012357] [2021-03-10 22:07:19,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:19,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:19,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:19,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:19,976 INFO L87 Difference]: Start difference. First operand 693 states and 2352 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:20,994 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 22:07:21,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:21,680 INFO L93 Difference]: Finished difference Result 1121 states and 3532 transitions. [2021-03-10 22:07:21,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:07:21,680 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:21,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:21,682 INFO L225 Difference]: With dead ends: 1121 [2021-03-10 22:07:21,682 INFO L226 Difference]: Without dead ends: 975 [2021-03-10 22:07:21,682 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1599.5ms TimeCoverageRelationStatistics Valid=175, Invalid=755, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:07:21,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-03-10 22:07:21,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 715. [2021-03-10 22:07:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 3.410364145658263) internal successors, (2435), 714 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:21,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 2435 transitions. [2021-03-10 22:07:21,691 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 2435 transitions. Word has length 21 [2021-03-10 22:07:21,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:21,691 INFO L480 AbstractCegarLoop]: Abstraction has 715 states and 2435 transitions. [2021-03-10 22:07:21,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:21,691 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 2435 transitions. [2021-03-10 22:07:21,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:21,692 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:21,692 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:21,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5801 [2021-03-10 22:07:21,899 INFO L428 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:21,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:21,899 INFO L82 PathProgramCache]: Analyzing trace with hash 69090519, now seen corresponding path program 10 times [2021-03-10 22:07:21,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:21,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648898822] [2021-03-10 22:07:21,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:22,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648898822] [2021-03-10 22:07:22,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181758490] [2021-03-10 22:07:22,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:22,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:07:22,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:22,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 22:07:22,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:22,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:07:22,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:22,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:07:22,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:22,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:07:22,263 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:22,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:07:22,267 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:22,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:07:22,271 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:22,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:07:22,275 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:22,379 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-03-10 22:07:22,380 INFO L628 ElimStorePlain]: treesize reduction 22, result has 81.5 percent of original size [2021-03-10 22:07:22,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:07:22,381 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:176, output treesize:97 [2021-03-10 22:07:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:07:22,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:22,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-03-10 22:07:22,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214784884] [2021-03-10 22:07:22,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:22,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:22,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:22,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:22,574 INFO L87 Difference]: Start difference. First operand 715 states and 2435 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:23,156 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-10 22:07:23,427 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-03-10 22:07:23,608 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-03-10 22:07:23,835 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-03-10 22:07:24,040 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-03-10 22:07:24,341 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-03-10 22:07:24,565 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-03-10 22:07:24,878 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-03-10 22:07:25,191 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-03-10 22:07:25,405 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-03-10 22:07:25,775 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-03-10 22:07:26,104 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-10 22:07:26,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:26,268 INFO L93 Difference]: Finished difference Result 1681 states and 5162 transitions. [2021-03-10 22:07:26,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:07:26,268 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:26,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:26,270 INFO L225 Difference]: With dead ends: 1681 [2021-03-10 22:07:26,270 INFO L226 Difference]: Without dead ends: 1450 [2021-03-10 22:07:26,270 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 3377.2ms TimeCoverageRelationStatistics Valid=303, Invalid=1337, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:07:26,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2021-03-10 22:07:26,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 747. [2021-03-10 22:07:26,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 3.455764075067024) internal successors, (2578), 746 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:26,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 2578 transitions. [2021-03-10 22:07:26,280 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 2578 transitions. Word has length 21 [2021-03-10 22:07:26,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:26,280 INFO L480 AbstractCegarLoop]: Abstraction has 747 states and 2578 transitions. [2021-03-10 22:07:26,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:26,280 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 2578 transitions. [2021-03-10 22:07:26,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:26,281 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:26,281 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:26,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5811,613 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:26,481 INFO L428 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:26,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:26,481 INFO L82 PathProgramCache]: Analyzing trace with hash -792723440, now seen corresponding path program 601 times [2021-03-10 22:07:26,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:26,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755761224] [2021-03-10 22:07:26,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:26,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755761224] [2021-03-10 22:07:26,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563450848] [2021-03-10 22:07:26,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:26,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:26,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:26,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:27,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:27,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:27,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-03-10 22:07:27,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:27,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:27,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:27,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-03-10 22:07:27,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:27,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:27,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:27,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:07:27,224 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:27,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:27,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:27,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:07:27,231 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:27,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:27,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:27,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:07:27,236 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:27,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:27,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:07:27,241 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:27,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:27,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:07:27,288 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:255, output treesize:48 [2021-03-10 22:07:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:27,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:27,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-03-10 22:07:27,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415585923] [2021-03-10 22:07:27,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:27,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:27,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:27,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:27,457 INFO L87 Difference]: Start difference. First operand 747 states and 2578 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:27,923 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2021-03-10 22:07:28,663 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 22:07:28,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:28,887 INFO L93 Difference]: Finished difference Result 999 states and 3354 transitions. [2021-03-10 22:07:28,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:07:28,888 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:28,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:28,889 INFO L225 Difference]: With dead ends: 999 [2021-03-10 22:07:28,889 INFO L226 Difference]: Without dead ends: 930 [2021-03-10 22:07:28,889 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1231.2ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:07:28,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-03-10 22:07:28,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 772. [2021-03-10 22:07:28,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.4643320363164722) internal successors, (2671), 771 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:28,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2671 transitions. [2021-03-10 22:07:28,898 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2671 transitions. Word has length 21 [2021-03-10 22:07:28,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:28,898 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2671 transitions. [2021-03-10 22:07:28,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:28,898 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2671 transitions. [2021-03-10 22:07:28,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:28,899 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:28,899 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:29,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5831,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:29,099 INFO L428 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:29,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:29,099 INFO L82 PathProgramCache]: Analyzing trace with hash -251408250, now seen corresponding path program 602 times [2021-03-10 22:07:29,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:29,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159755015] [2021-03-10 22:07:29,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:29,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:29,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159755015] [2021-03-10 22:07:29,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367142346] [2021-03-10 22:07:29,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:29,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:29,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:29,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 22:07:29,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:29,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:29,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:29,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-03-10 22:07:29,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:29,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:29,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:29,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:07:29,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:29,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:07:29,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:29,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:29,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:29,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-03-10 22:07:29,796 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:29,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:07:29,800 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:29,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:07:29,804 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:29,897 INFO L628 ElimStorePlain]: treesize reduction 29, result has 76.2 percent of original size [2021-03-10 22:07:29,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:07:29,899 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:213, output treesize:49 [2021-03-10 22:07:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:30,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:30,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-10 22:07:30,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534444843] [2021-03-10 22:07:30,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:30,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:30,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:30,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:30,003 INFO L87 Difference]: Start difference. First operand 772 states and 2671 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:30,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:30,937 INFO L93 Difference]: Finished difference Result 1019 states and 3433 transitions. [2021-03-10 22:07:30,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:07:30,938 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:30,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:30,939 INFO L225 Difference]: With dead ends: 1019 [2021-03-10 22:07:30,940 INFO L226 Difference]: Without dead ends: 972 [2021-03-10 22:07:30,940 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 857.9ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:07:30,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-03-10 22:07:30,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 766. [2021-03-10 22:07:30,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 3.458823529411765) internal successors, (2646), 765 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:30,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2646 transitions. [2021-03-10 22:07:30,948 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2646 transitions. Word has length 21 [2021-03-10 22:07:30,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:30,948 INFO L480 AbstractCegarLoop]: Abstraction has 766 states and 2646 transitions. [2021-03-10 22:07:30,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:30,948 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2646 transitions. [2021-03-10 22:07:30,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:30,949 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:30,949 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:31,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5886,615 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:31,149 INFO L428 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:31,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:31,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1567168848, now seen corresponding path program 603 times [2021-03-10 22:07:31,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:31,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865523738] [2021-03-10 22:07:31,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:31,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:31,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865523738] [2021-03-10 22:07:31,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799440462] [2021-03-10 22:07:31,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:31,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:07:31,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:31,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:31,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:31,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:07:31,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:07:31,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:07:31,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-03-10 22:07:31,926 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:07:31,933 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-03-10 22:07:31,939 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:07:31,945 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:31,949 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:07:31,955 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:32,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:32,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:07:32,023 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:445, output treesize:73 [2021-03-10 22:07:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:32,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:32,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-03-10 22:07:32,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146647566] [2021-03-10 22:07:32,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:32,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:32,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:32,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:32,322 INFO L87 Difference]: Start difference. First operand 766 states and 2646 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:32,803 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-03-10 22:07:32,987 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-03-10 22:07:33,267 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-10 22:07:33,568 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-03-10 22:07:33,750 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-03-10 22:07:34,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:34,022 INFO L93 Difference]: Finished difference Result 1019 states and 3407 transitions. [2021-03-10 22:07:34,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:07:34,023 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:34,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:34,024 INFO L225 Difference]: With dead ends: 1019 [2021-03-10 22:07:34,024 INFO L226 Difference]: Without dead ends: 950 [2021-03-10 22:07:34,024 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1641.1ms TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:07:34,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-03-10 22:07:34,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 766. [2021-03-10 22:07:34,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 3.458823529411765) internal successors, (2646), 765 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:34,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2646 transitions. [2021-03-10 22:07:34,033 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2646 transitions. Word has length 21 [2021-03-10 22:07:34,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:34,033 INFO L480 AbstractCegarLoop]: Abstraction has 766 states and 2646 transitions. [2021-03-10 22:07:34,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:34,033 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2646 transitions. [2021-03-10 22:07:34,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:34,034 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:34,034 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:34,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5925,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:34,234 INFO L428 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:34,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:34,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1224209328, now seen corresponding path program 604 times [2021-03-10 22:07:34,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:34,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688447007] [2021-03-10 22:07:34,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:34,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688447007] [2021-03-10 22:07:34,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758893199] [2021-03-10 22:07:34,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:34,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:07:34,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:34,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:34,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:34,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:34,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:34,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:07:34,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:34,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:34,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:34,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:07:34,944 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:34,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:34,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:34,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:07:34,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:34,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:34,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:34,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:07:34,957 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:34,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:34,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:34,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-03-10 22:07:34,963 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:34,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:34,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-03-10 22:07:34,968 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:35,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:35,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:07:35,016 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:255, output treesize:48 [2021-03-10 22:07:35,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:35,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:35,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-03-10 22:07:35,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064776211] [2021-03-10 22:07:35,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:35,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:35,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:35,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:35,183 INFO L87 Difference]: Start difference. First operand 766 states and 2646 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:36,164 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-10 22:07:36,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:36,366 INFO L93 Difference]: Finished difference Result 1021 states and 3431 transitions. [2021-03-10 22:07:36,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:07:36,366 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:36,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:36,368 INFO L225 Difference]: With dead ends: 1021 [2021-03-10 22:07:36,368 INFO L226 Difference]: Without dead ends: 952 [2021-03-10 22:07:36,368 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1124.3ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:07:36,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-03-10 22:07:36,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 783. [2021-03-10 22:07:36,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.4705882352941178) internal successors, (2714), 782 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:36,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2714 transitions. [2021-03-10 22:07:36,376 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2714 transitions. Word has length 21 [2021-03-10 22:07:36,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:36,376 INFO L480 AbstractCegarLoop]: Abstraction has 783 states and 2714 transitions. [2021-03-10 22:07:36,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:36,376 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2714 transitions. [2021-03-10 22:07:36,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:36,377 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:36,377 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:36,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5998 [2021-03-10 22:07:36,577 INFO L428 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:36,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:36,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1252180870, now seen corresponding path program 605 times [2021-03-10 22:07:36,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:36,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689858476] [2021-03-10 22:07:36,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:36,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689858476] [2021-03-10 22:07:36,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920222599] [2021-03-10 22:07:36,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:36,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:07:36,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:36,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:36,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:37,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:07:37,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,260 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:37,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:07:37,269 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:07:37,277 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:07:37,284 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-03-10 22:07:37,291 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:07:37,299 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:07:37,306 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:07:37,312 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,536 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-03-10 22:07:37,537 INFO L628 ElimStorePlain]: treesize reduction 6, result has 97.3 percent of original size [2021-03-10 22:07:37,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:07:37,539 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:457, output treesize:118 [2021-03-10 22:07:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:37,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:37,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-03-10 22:07:37,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308465343] [2021-03-10 22:07:37,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:37,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:37,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:37,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:37,860 INFO L87 Difference]: Start difference. First operand 783 states and 2714 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:38,343 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 22:07:38,526 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-10 22:07:38,685 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-03-10 22:07:38,866 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 22:07:39,028 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 22:07:39,211 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-03-10 22:07:39,403 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-03-10 22:07:39,602 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-10 22:07:39,774 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-10 22:07:39,930 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-03-10 22:07:40,091 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-03-10 22:07:40,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:40,117 INFO L93 Difference]: Finished difference Result 1105 states and 3614 transitions. [2021-03-10 22:07:40,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:07:40,117 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:40,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:40,118 INFO L225 Difference]: With dead ends: 1105 [2021-03-10 22:07:40,118 INFO L226 Difference]: Without dead ends: 967 [2021-03-10 22:07:40,119 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2257.5ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:07:40,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-03-10 22:07:40,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 783. [2021-03-10 22:07:40,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.4705882352941178) internal successors, (2714), 782 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:40,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2714 transitions. [2021-03-10 22:07:40,127 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2714 transitions. Word has length 21 [2021-03-10 22:07:40,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:40,127 INFO L480 AbstractCegarLoop]: Abstraction has 783 states and 2714 transitions. [2021-03-10 22:07:40,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:40,127 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2714 transitions. [2021-03-10 22:07:40,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:40,128 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:40,128 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:40,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6052,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:40,329 INFO L428 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:40,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:40,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1982008336, now seen corresponding path program 606 times [2021-03-10 22:07:40,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:40,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010559423] [2021-03-10 22:07:40,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:40,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010559423] [2021-03-10 22:07:40,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103022323] [2021-03-10 22:07:40,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:40,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:07:40,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:40,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:40,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:41,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:41,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:41,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:07:41,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:41,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:41,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:41,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-03-10 22:07:41,027 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:41,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:41,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:41,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-03-10 22:07:41,034 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:41,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:41,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:41,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:07:41,041 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:41,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:41,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:41,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:07:41,048 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:41,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:41,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:41,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-03-10 22:07:41,054 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:41,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:41,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:41,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-03-10 22:07:41,061 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:41,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:41,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:41,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:07:41,067 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:41,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:41,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:07:41,073 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:41,255 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-03-10 22:07:41,256 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.5 percent of original size [2021-03-10 22:07:41,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:07:41,258 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:472, output treesize:101 [2021-03-10 22:07:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:41,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:41,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-03-10 22:07:41,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616915418] [2021-03-10 22:07:41,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:41,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:41,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:41,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:41,507 INFO L87 Difference]: Start difference. First operand 783 states and 2714 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:41,964 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 22:07:42,416 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-03-10 22:07:42,586 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-03-10 22:07:42,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:42,827 INFO L93 Difference]: Finished difference Result 1175 states and 3821 transitions. [2021-03-10 22:07:42,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:07:42,828 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:42,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:42,829 INFO L225 Difference]: With dead ends: 1175 [2021-03-10 22:07:42,829 INFO L226 Difference]: Without dead ends: 1091 [2021-03-10 22:07:42,829 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1297.3ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:07:42,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-03-10 22:07:42,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 810. [2021-03-10 22:07:42,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.508034610630408) internal successors, (2838), 809 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:42,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2838 transitions. [2021-03-10 22:07:42,839 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2838 transitions. Word has length 21 [2021-03-10 22:07:42,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:42,839 INFO L480 AbstractCegarLoop]: Abstraction has 810 states and 2838 transitions. [2021-03-10 22:07:42,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:42,839 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2838 transitions. [2021-03-10 22:07:42,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:42,840 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:42,840 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:43,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6128 [2021-03-10 22:07:43,040 INFO L428 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:43,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:43,040 INFO L82 PathProgramCache]: Analyzing trace with hash -679907568, now seen corresponding path program 607 times [2021-03-10 22:07:43,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:43,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882138490] [2021-03-10 22:07:43,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:43,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882138490] [2021-03-10 22:07:43,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071025986] [2021-03-10 22:07:43,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:43,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:07:43,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:43,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:07:43,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:43,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:07:43,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:43,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:07:43,491 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:43,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:43,495 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:43,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:07:43,500 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:43,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:07:43,504 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:43,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:07:43,508 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:43,511 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:43,512 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:43,515 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:43,516 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:43,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:43,519 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:43,522 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:43,522 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:43,598 INFO L628 ElimStorePlain]: treesize reduction 28, result has 73.8 percent of original size [2021-03-10 22:07:43,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:07:43,599 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:384, output treesize:79 [2021-03-10 22:07:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:43,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:43,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-03-10 22:07:43,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819024384] [2021-03-10 22:07:43,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:07:43,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:43,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:07:43,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:07:43,774 INFO L87 Difference]: Start difference. First operand 810 states and 2838 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:44,525 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-03-10 22:07:44,697 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-10 22:07:44,837 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 22:07:45,051 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 22:07:45,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:45,457 INFO L93 Difference]: Finished difference Result 1581 states and 4939 transitions. [2021-03-10 22:07:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:07:45,458 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:45,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:45,459 INFO L225 Difference]: With dead ends: 1581 [2021-03-10 22:07:45,459 INFO L226 Difference]: Without dead ends: 1460 [2021-03-10 22:07:45,460 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1582.5ms TimeCoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:07:45,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-03-10 22:07:45,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 822. [2021-03-10 22:07:45,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 3.5140073081607794) internal successors, (2885), 821 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:45,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2885 transitions. [2021-03-10 22:07:45,471 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2885 transitions. Word has length 21 [2021-03-10 22:07:45,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:45,471 INFO L480 AbstractCegarLoop]: Abstraction has 822 states and 2885 transitions. [2021-03-10 22:07:45,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:45,471 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2885 transitions. [2021-03-10 22:07:45,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:45,472 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:45,472 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:45,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6206,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:45,672 INFO L428 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:45,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:45,672 INFO L82 PathProgramCache]: Analyzing trace with hash -32020132, now seen corresponding path program 608 times [2021-03-10 22:07:45,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:45,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819791019] [2021-03-10 22:07:45,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:45,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819791019] [2021-03-10 22:07:45,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294689565] [2021-03-10 22:07:45,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:45,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:45,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:45,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:07:45,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:46,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:07:46,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:07:46,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:07:46,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,178 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:46,179 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:07:46,183 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:46,210 INFO L628 ElimStorePlain]: treesize reduction 16, result has 65.2 percent of original size [2021-03-10 22:07:46,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:07:46,211 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:122, output treesize:30 [2021-03-10 22:07:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:46,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:46,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-03-10 22:07:46,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981557625] [2021-03-10 22:07:46,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:07:46,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:46,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:07:46,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:07:46,295 INFO L87 Difference]: Start difference. First operand 822 states and 2885 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:47,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:47,387 INFO L93 Difference]: Finished difference Result 1231 states and 4121 transitions. [2021-03-10 22:07:47,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:07:47,388 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:47,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:47,389 INFO L225 Difference]: With dead ends: 1231 [2021-03-10 22:07:47,389 INFO L226 Difference]: Without dead ends: 1162 [2021-03-10 22:07:47,390 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 869.2ms TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:07:47,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-03-10 22:07:47,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 806. [2021-03-10 22:07:47,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.5031055900621118) internal successors, (2820), 805 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:47,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2820 transitions. [2021-03-10 22:07:47,400 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2820 transitions. Word has length 21 [2021-03-10 22:07:47,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:47,400 INFO L480 AbstractCegarLoop]: Abstraction has 806 states and 2820 transitions. [2021-03-10 22:07:47,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:47,400 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2820 transitions. [2021-03-10 22:07:47,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:47,401 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:47,401 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:47,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 621 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6224 [2021-03-10 22:07:47,602 INFO L428 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:47,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:47,602 INFO L82 PathProgramCache]: Analyzing trace with hash -276286010, now seen corresponding path program 609 times [2021-03-10 22:07:47,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:47,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264386278] [2021-03-10 22:07:47,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:47,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264386278] [2021-03-10 22:07:47,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698026418] [2021-03-10 22:07:47,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:47,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:07:47,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:47,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:07:47,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:48,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:07:48,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:48,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:07:48,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:48,175 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:48,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:48,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:48,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:48,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-03-10 22:07:48,181 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:48,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:48,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:48,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-03-10 22:07:48,187 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:48,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:48,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:07:48,192 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:48,275 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-03-10 22:07:48,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:07:48,276 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:204, output treesize:43 [2021-03-10 22:07:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:48,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:48,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:07:48,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117915901] [2021-03-10 22:07:48,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:07:48,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:48,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:07:48,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:07:48,366 INFO L87 Difference]: Start difference. First operand 806 states and 2820 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:48,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:48,827 INFO L93 Difference]: Finished difference Result 1006 states and 3459 transitions. [2021-03-10 22:07:48,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:07:48,827 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:48,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:48,829 INFO L225 Difference]: With dead ends: 1006 [2021-03-10 22:07:48,829 INFO L226 Difference]: Without dead ends: 959 [2021-03-10 22:07:48,829 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 497.9ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:48,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-03-10 22:07:48,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 830. [2021-03-10 22:07:48,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.51145958986731) internal successors, (2911), 829 states have internal predecessors, (2911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:48,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2911 transitions. [2021-03-10 22:07:48,838 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2911 transitions. Word has length 21 [2021-03-10 22:07:48,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:48,838 INFO L480 AbstractCegarLoop]: Abstraction has 830 states and 2911 transitions. [2021-03-10 22:07:48,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:48,838 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2911 transitions. [2021-03-10 22:07:48,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:48,839 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:48,839 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:49,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6236,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:49,039 INFO L428 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:49,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:49,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1542291088, now seen corresponding path program 610 times [2021-03-10 22:07:49,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:49,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333074329] [2021-03-10 22:07:49,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:49,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333074329] [2021-03-10 22:07:49,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097000908] [2021-03-10 22:07:49,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:49,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:07:49,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:49,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:49,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:49,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:07:49,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:07:49,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:07:49,474 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:07:49,478 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:07:49,482 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:07:49,495 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,562 INFO L628 ElimStorePlain]: treesize reduction 21, result has 76.9 percent of original size [2021-03-10 22:07:49,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:07:49,564 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:178, output treesize:70 [2021-03-10 22:07:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:49,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:49,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-03-10 22:07:49,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750942113] [2021-03-10 22:07:49,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:07:49,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:49,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:07:49,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:07:49,769 INFO L87 Difference]: Start difference. First operand 830 states and 2911 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:50,218 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-03-10 22:07:50,496 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-10 22:07:50,943 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-03-10 22:07:51,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:51,205 INFO L93 Difference]: Finished difference Result 1063 states and 3616 transitions. [2021-03-10 22:07:51,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:07:51,206 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:51,207 INFO L225 Difference]: With dead ends: 1063 [2021-03-10 22:07:51,207 INFO L226 Difference]: Without dead ends: 994 [2021-03-10 22:07:51,207 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1387.3ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:07:51,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-03-10 22:07:51,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 830. [2021-03-10 22:07:51,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.51145958986731) internal successors, (2911), 829 states have internal predecessors, (2911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:51,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2911 transitions. [2021-03-10 22:07:51,217 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2911 transitions. Word has length 21 [2021-03-10 22:07:51,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:51,217 INFO L480 AbstractCegarLoop]: Abstraction has 830 states and 2911 transitions. [2021-03-10 22:07:51,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:51,217 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2911 transitions. [2021-03-10 22:07:51,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:51,218 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:51,218 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:51,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6274 [2021-03-10 22:07:51,418 INFO L428 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:51,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:51,418 INFO L82 PathProgramCache]: Analyzing trace with hash 481512998, now seen corresponding path program 611 times [2021-03-10 22:07:51,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:51,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139767366] [2021-03-10 22:07:51,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:51,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139767366] [2021-03-10 22:07:51,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734400601] [2021-03-10 22:07:51,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:51,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:07:51,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:51,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:07:51,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:52,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:52,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:52,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:07:52,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:52,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:52,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:52,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-03-10 22:07:52,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:52,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:52,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:52,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:07:52,178 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:52,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:52,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:52,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:07:52,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:52,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:52,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:52,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-03-10 22:07:52,193 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:52,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:52,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:52,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-03-10 22:07:52,200 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:52,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:52,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:52,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-03-10 22:07:52,207 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:52,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:52,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:52,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-03-10 22:07:52,214 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:52,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:52,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:52,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:07:52,221 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:52,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:52,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:52,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:07:52,229 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:52,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:52,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:52,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-03-10 22:07:52,235 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:52,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:52,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:07:52,241 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:52,402 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-10 22:07:52,403 INFO L628 ElimStorePlain]: treesize reduction 112, result has 56.6 percent of original size [2021-03-10 22:07:52,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:07:52,405 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:620, output treesize:82 [2021-03-10 22:07:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:52,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:52,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:07:52,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980524472] [2021-03-10 22:07:52,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:07:52,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:52,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:07:52,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:07:52,597 INFO L87 Difference]: Start difference. First operand 830 states and 2911 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:53,199 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-10 22:07:53,320 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 22:07:53,543 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-03-10 22:07:53,757 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-03-10 22:07:53,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:53,819 INFO L93 Difference]: Finished difference Result 1196 states and 3968 transitions. [2021-03-10 22:07:53,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:07:53,820 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:53,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:53,821 INFO L225 Difference]: With dead ends: 1196 [2021-03-10 22:07:53,821 INFO L226 Difference]: Without dead ends: 1102 [2021-03-10 22:07:53,821 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1223.3ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:07:53,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-03-10 22:07:53,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 844. [2021-03-10 22:07:53,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.5397390272835114) internal successors, (2984), 843 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:53,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2984 transitions. [2021-03-10 22:07:53,831 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2984 transitions. Word has length 21 [2021-03-10 22:07:53,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:53,831 INFO L480 AbstractCegarLoop]: Abstraction has 844 states and 2984 transitions. [2021-03-10 22:07:53,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:53,831 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2984 transitions. [2021-03-10 22:07:53,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:53,832 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:53,832 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:54,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6292 [2021-03-10 22:07:54,033 INFO L428 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:54,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:54,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1901400646, now seen corresponding path program 612 times [2021-03-10 22:07:54,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:54,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237137327] [2021-03-10 22:07:54,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:54,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237137327] [2021-03-10 22:07:54,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057577697] [2021-03-10 22:07:54,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:54,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:07:54,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:54,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:54,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:54,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:54,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:54,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-03-10 22:07:54,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:54,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:54,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:54,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:07:54,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:54,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:54,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:54,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:07:54,776 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:54,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:07:54,781 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:54,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:07:54,785 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:54,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:54,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:54,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-03-10 22:07:54,790 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:54,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:54,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:54,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:07:54,795 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:54,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:07:54,799 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:54,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:54,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:07:54,804 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:54,927 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-10 22:07:54,927 INFO L628 ElimStorePlain]: treesize reduction 29, result has 82.0 percent of original size [2021-03-10 22:07:54,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:07:54,932 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:376, output treesize:74 [2021-03-10 22:07:55,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:55,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:55,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-03-10 22:07:55,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969902404] [2021-03-10 22:07:55,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:55,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:55,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:55,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:55,137 INFO L87 Difference]: Start difference. First operand 844 states and 2984 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:56,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:56,242 INFO L93 Difference]: Finished difference Result 1117 states and 3747 transitions. [2021-03-10 22:07:56,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:07:56,243 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:56,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:56,244 INFO L225 Difference]: With dead ends: 1117 [2021-03-10 22:07:56,244 INFO L226 Difference]: Without dead ends: 1048 [2021-03-10 22:07:56,245 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1150.4ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:07:56,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-03-10 22:07:56,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 831. [2021-03-10 22:07:56,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.5204819277108435) internal successors, (2922), 830 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:56,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2922 transitions. [2021-03-10 22:07:56,254 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2922 transitions. Word has length 21 [2021-03-10 22:07:56,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:56,254 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2922 transitions. [2021-03-10 22:07:56,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:56,254 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2922 transitions. [2021-03-10 22:07:56,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:56,255 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:56,255 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:56,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 625 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6344 [2021-03-10 22:07:56,455 INFO L428 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:56,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:56,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1957130576, now seen corresponding path program 613 times [2021-03-10 22:07:56,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:56,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716892049] [2021-03-10 22:07:56,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:56,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716892049] [2021-03-10 22:07:56,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331035930] [2021-03-10 22:07:56,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:56,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:07:56,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:57,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:57,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:57,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:07:57,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,102 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:57,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,106 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:57,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,252 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-03-10 22:07:57,252 INFO L628 ElimStorePlain]: treesize reduction 139, result has 49.6 percent of original size [2021-03-10 22:07:57,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:57,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:57,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:07:57,258 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:57,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:07:57,262 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:57,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:57,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:07:57,331 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:57,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:57,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:07:57,392 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:385, output treesize:82 [2021-03-10 22:07:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:57,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:57,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-10 22:07:57,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127046338] [2021-03-10 22:07:57,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:07:57,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:57,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:07:57,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:07:57,599 INFO L87 Difference]: Start difference. First operand 831 states and 2922 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:57,874 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-10 22:07:58,388 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-10 22:07:58,510 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 22:07:58,728 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-03-10 22:07:58,936 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-03-10 22:07:59,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:59,014 INFO L93 Difference]: Finished difference Result 1196 states and 3981 transitions. [2021-03-10 22:07:59,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:07:59,014 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:07:59,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:59,016 INFO L225 Difference]: With dead ends: 1196 [2021-03-10 22:07:59,016 INFO L226 Difference]: Without dead ends: 1102 [2021-03-10 22:07:59,016 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1462.2ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:07:59,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-03-10 22:07:59,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 855. [2021-03-10 22:07:59,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 3.5526932084309135) internal successors, (3034), 854 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:59,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 3034 transitions. [2021-03-10 22:07:59,026 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 3034 transitions. Word has length 21 [2021-03-10 22:07:59,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:59,026 INFO L480 AbstractCegarLoop]: Abstraction has 855 states and 3034 transitions. [2021-03-10 22:07:59,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:59,026 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 3034 transitions. [2021-03-10 22:07:59,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:07:59,027 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:59,027 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:59,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6394 [2021-03-10 22:07:59,227 INFO L428 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:59,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:59,228 INFO L82 PathProgramCache]: Analyzing trace with hash -917949072, now seen corresponding path program 614 times [2021-03-10 22:07:59,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:59,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802764107] [2021-03-10 22:07:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:59,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802764107] [2021-03-10 22:07:59,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742210097] [2021-03-10 22:07:59,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:59,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:59,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:59,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:59,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:59,687 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-03-10 22:08:00,062 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_160, nondet_0], 1=[v_prenex_161, v_prenex_162]} [2021-03-10 22:08:00,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:00,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,253 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-03-10 22:08:00,254 INFO L628 ElimStorePlain]: treesize reduction 245, result has 39.5 percent of original size [2021-03-10 22:08:00,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:00,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:08:00,263 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,386 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-10 22:08:00,387 INFO L628 ElimStorePlain]: treesize reduction 20, result has 86.0 percent of original size [2021-03-10 22:08:00,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:00,393 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:00,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:08:00,398 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,496 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-03-10 22:08:00,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:08:00,500 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:00,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:00,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:08:00,549 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:416, output treesize:74 [2021-03-10 22:08:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:00,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:00,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-03-10 22:08:00,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059252554] [2021-03-10 22:08:00,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:08:00,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:00,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:08:00,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:08:00,763 INFO L87 Difference]: Start difference. First operand 855 states and 3034 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:01,037 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-10 22:08:02,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:02,048 INFO L93 Difference]: Finished difference Result 1271 states and 4134 transitions. [2021-03-10 22:08:02,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:08:02,049 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:02,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:02,051 INFO L225 Difference]: With dead ends: 1271 [2021-03-10 22:08:02,051 INFO L226 Difference]: Without dead ends: 1187 [2021-03-10 22:08:02,051 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1391.5ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:08:02,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-03-10 22:08:02,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 855. [2021-03-10 22:08:02,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 3.5257611241217797) internal successors, (3011), 854 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:02,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 3011 transitions. [2021-03-10 22:08:02,062 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 3011 transitions. Word has length 21 [2021-03-10 22:08:02,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:02,062 INFO L480 AbstractCegarLoop]: Abstraction has 855 states and 3011 transitions. [2021-03-10 22:08:02,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:02,062 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 3011 transitions. [2021-03-10 22:08:02,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:02,063 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:02,063 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:02,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6437,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:02,263 INFO L428 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:02,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:02,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1051616592, now seen corresponding path program 615 times [2021-03-10 22:08:02,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:02,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371407923] [2021-03-10 22:08:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:02,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:02,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371407923] [2021-03-10 22:08:02,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337514298] [2021-03-10 22:08:02,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:02,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:08:02,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:02,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:08:02,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:02,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:08:02,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:02,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:02,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:02,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:08:02,757 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:02,759 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:02,759 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:02,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:02,762 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:02,787 INFO L628 ElimStorePlain]: treesize reduction 16, result has 65.2 percent of original size [2021-03-10 22:08:02,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:08:02,788 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:122, output treesize:30 [2021-03-10 22:08:02,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:02,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:02,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-03-10 22:08:02,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897251501] [2021-03-10 22:08:02,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:08:02,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:02,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:08:02,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:08:02,864 INFO L87 Difference]: Start difference. First operand 855 states and 3011 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:04,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:04,032 INFO L93 Difference]: Finished difference Result 1249 states and 4236 transitions. [2021-03-10 22:08:04,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:08:04,032 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:04,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:04,034 INFO L225 Difference]: With dead ends: 1249 [2021-03-10 22:08:04,034 INFO L226 Difference]: Without dead ends: 1158 [2021-03-10 22:08:04,034 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 925.0ms TimeCoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:08:04,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-03-10 22:08:04,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 863. [2021-03-10 22:08:04,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.5092807424593966) internal successors, (3025), 862 states have internal predecessors, (3025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:04,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 3025 transitions. [2021-03-10 22:08:04,045 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 3025 transitions. Word has length 21 [2021-03-10 22:08:04,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:04,045 INFO L480 AbstractCegarLoop]: Abstraction has 863 states and 3025 transitions. [2021-03-10 22:08:04,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:04,045 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 3025 transitions. [2021-03-10 22:08:04,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:04,046 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:04,046 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:04,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6502,628 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:04,246 INFO L428 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:04,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:04,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1743900363, now seen corresponding path program 11 times [2021-03-10 22:08:04,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:04,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212762136] [2021-03-10 22:08:04,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:04,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:04,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212762136] [2021-03-10 22:08:04,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859836161] [2021-03-10 22:08:04,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:04,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:08:04,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:04,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:08:04,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:04,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:08:04,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:08:04,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,610 INFO L628 ElimStorePlain]: treesize reduction 12, result has 62.5 percent of original size [2021-03-10 22:08:04,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:08:04,610 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:43, output treesize:20 [2021-03-10 22:08:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:08:04,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:04,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-03-10 22:08:04,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518086600] [2021-03-10 22:08:04,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:08:04,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:04,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:08:04,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:08:04,668 INFO L87 Difference]: Start difference. First operand 863 states and 3025 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:05,171 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-10 22:08:05,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:05,307 INFO L93 Difference]: Finished difference Result 1251 states and 4162 transitions. [2021-03-10 22:08:05,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:08:05,307 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:05,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:05,308 INFO L225 Difference]: With dead ends: 1251 [2021-03-10 22:08:05,308 INFO L226 Difference]: Without dead ends: 1145 [2021-03-10 22:08:05,309 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 575.0ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:08:05,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-03-10 22:08:05,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 902. [2021-03-10 22:08:05,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.564927857935627) internal successors, (3212), 901 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:05,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3212 transitions. [2021-03-10 22:08:05,318 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3212 transitions. Word has length 21 [2021-03-10 22:08:05,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:05,318 INFO L480 AbstractCegarLoop]: Abstraction has 902 states and 3212 transitions. [2021-03-10 22:08:05,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:05,318 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3212 transitions. [2021-03-10 22:08:05,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:05,319 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:05,319 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:05,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6516,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:05,534 INFO L428 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:05,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:05,534 INFO L82 PathProgramCache]: Analyzing trace with hash 450276245, now seen corresponding path program 12 times [2021-03-10 22:08:05,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:05,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824898172] [2021-03-10 22:08:05,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:05,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:05,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824898172] [2021-03-10 22:08:05,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202554603] [2021-03-10 22:08:05,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:05,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:08:05,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:05,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:08:05,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:05,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:05,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:05,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:05,873 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:05,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:05,878 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:05,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:05,882 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:05,884 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:05,885 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:05,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:08:05,889 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:05,938 INFO L628 ElimStorePlain]: treesize reduction 28, result has 58.2 percent of original size [2021-03-10 22:08:05,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:08:05,939 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:138, output treesize:39 [2021-03-10 22:08:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:08:06,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:06,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 22:08:06,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853810313] [2021-03-10 22:08:06,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:08:06,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:06,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:08:06,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:06,032 INFO L87 Difference]: Start difference. First operand 902 states and 3212 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:06,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:06,873 INFO L93 Difference]: Finished difference Result 1317 states and 4386 transitions. [2021-03-10 22:08:06,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:08:06,874 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:06,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:06,875 INFO L225 Difference]: With dead ends: 1317 [2021-03-10 22:08:06,875 INFO L226 Difference]: Without dead ends: 1218 [2021-03-10 22:08:06,875 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 709.3ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:08:06,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2021-03-10 22:08:06,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 931. [2021-03-10 22:08:06,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.6032258064516127) internal successors, (3351), 930 states have internal predecessors, (3351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:06,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3351 transitions. [2021-03-10 22:08:06,886 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3351 transitions. Word has length 21 [2021-03-10 22:08:06,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:06,887 INFO L480 AbstractCegarLoop]: Abstraction has 931 states and 3351 transitions. [2021-03-10 22:08:06,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:06,887 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3351 transitions. [2021-03-10 22:08:06,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:06,888 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:06,888 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:07,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6526,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:07,088 INFO L428 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:07,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:07,088 INFO L82 PathProgramCache]: Analyzing trace with hash 360447341, now seen corresponding path program 13 times [2021-03-10 22:08:07,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:07,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497326138] [2021-03-10 22:08:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:07,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497326138] [2021-03-10 22:08:07,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842761081] [2021-03-10 22:08:07,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:07,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:07,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 22:08:07,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:07,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:07,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:07,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:07,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:07,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:07,426 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:07,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:07,430 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:07,433 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:07,434 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:07,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:08:07,438 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:07,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:07,442 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:07,528 INFO L628 ElimStorePlain]: treesize reduction 18, result has 78.8 percent of original size [2021-03-10 22:08:07,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:08:07,530 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:167, output treesize:67 [2021-03-10 22:08:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:07,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:07,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:08:07,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628602922] [2021-03-10 22:08:07,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:08:07,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:07,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:08:07,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:08:07,692 INFO L87 Difference]: Start difference. First operand 931 states and 3351 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:08,075 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-10 22:08:08,232 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 22:08:08,384 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-03-10 22:08:08,563 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-10 22:08:08,721 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-03-10 22:08:09,116 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-03-10 22:08:09,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:09,131 INFO L93 Difference]: Finished difference Result 1442 states and 4734 transitions. [2021-03-10 22:08:09,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:08:09,132 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:09,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:09,134 INFO L225 Difference]: With dead ends: 1442 [2021-03-10 22:08:09,134 INFO L226 Difference]: Without dead ends: 1295 [2021-03-10 22:08:09,134 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1342.4ms TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:08:09,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-03-10 22:08:09,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 945. [2021-03-10 22:08:09,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 3.608050847457627) internal successors, (3406), 944 states have internal predecessors, (3406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:09,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 3406 transitions. [2021-03-10 22:08:09,146 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 3406 transitions. Word has length 21 [2021-03-10 22:08:09,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:09,146 INFO L480 AbstractCegarLoop]: Abstraction has 945 states and 3406 transitions. [2021-03-10 22:08:09,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:09,147 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 3406 transitions. [2021-03-10 22:08:09,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:09,148 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:09,148 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:09,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6540 [2021-03-10 22:08:09,348 INFO L428 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:09,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:09,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1727328495, now seen corresponding path program 14 times [2021-03-10 22:08:09,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:09,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540920914] [2021-03-10 22:08:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:09,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540920914] [2021-03-10 22:08:09,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745685716] [2021-03-10 22:08:09,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:09,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:09,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:09,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:08:09,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:09,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:09,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:09,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,702 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:09,703 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:08:09,707 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,709 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:09,710 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,755 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.1 percent of original size [2021-03-10 22:08:09,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:08:09,756 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:110, output treesize:39 [2021-03-10 22:08:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:09,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:09,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 22:08:09,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987597283] [2021-03-10 22:08:09,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:08:09,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:09,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:08:09,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:09,863 INFO L87 Difference]: Start difference. First operand 945 states and 3406 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:11,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:11,049 INFO L93 Difference]: Finished difference Result 1310 states and 4422 transitions. [2021-03-10 22:08:11,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:08:11,050 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:11,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:11,052 INFO L225 Difference]: With dead ends: 1310 [2021-03-10 22:08:11,052 INFO L226 Difference]: Without dead ends: 1268 [2021-03-10 22:08:11,052 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 940.7ms TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:08:11,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2021-03-10 22:08:11,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 958. [2021-03-10 22:08:11,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 3.623824451410658) internal successors, (3468), 957 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:11,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 3468 transitions. [2021-03-10 22:08:11,063 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 3468 transitions. Word has length 21 [2021-03-10 22:08:11,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:11,063 INFO L480 AbstractCegarLoop]: Abstraction has 958 states and 3468 transitions. [2021-03-10 22:08:11,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:11,064 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 3468 transitions. [2021-03-10 22:08:11,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:11,065 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:11,065 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:11,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6557,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:11,265 INFO L428 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:11,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:11,265 INFO L82 PathProgramCache]: Analyzing trace with hash -853213671, now seen corresponding path program 15 times [2021-03-10 22:08:11,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:11,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23337408] [2021-03-10 22:08:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:11,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23337408] [2021-03-10 22:08:11,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503039155] [2021-03-10 22:08:11,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:11,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:08:11,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:11,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:08:11,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:11,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:11,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:11,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:11,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:11,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:11,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:11,571 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-03-10 22:08:11,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:08:11,572 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-03-10 22:08:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:08:11,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:11,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-03-10 22:08:11,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709375090] [2021-03-10 22:08:11,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:08:11,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:11,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:08:11,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:08:11,628 INFO L87 Difference]: Start difference. First operand 958 states and 3468 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:12,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:12,660 INFO L93 Difference]: Finished difference Result 1614 states and 5379 transitions. [2021-03-10 22:08:12,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:08:12,661 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:12,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:12,663 INFO L225 Difference]: With dead ends: 1614 [2021-03-10 22:08:12,663 INFO L226 Difference]: Without dead ends: 1445 [2021-03-10 22:08:12,663 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 673.1ms TimeCoverageRelationStatistics Valid=184, Invalid=872, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:08:12,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2021-03-10 22:08:12,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 894. [2021-03-10 22:08:12,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.534154535274356) internal successors, (3156), 893 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:12,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 3156 transitions. [2021-03-10 22:08:12,675 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 3156 transitions. Word has length 21 [2021-03-10 22:08:12,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:12,675 INFO L480 AbstractCegarLoop]: Abstraction has 894 states and 3156 transitions. [2021-03-10 22:08:12,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:12,675 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 3156 transitions. [2021-03-10 22:08:12,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:12,676 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:12,676 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:12,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6573 [2021-03-10 22:08:12,876 INFO L428 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:12,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:12,876 INFO L82 PathProgramCache]: Analyzing trace with hash 479969387, now seen corresponding path program 16 times [2021-03-10 22:08:12,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:12,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737302051] [2021-03-10 22:08:12,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:12,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737302051] [2021-03-10 22:08:12,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12958576] [2021-03-10 22:08:12,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:13,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:08:13,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:13,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:08:13,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:13,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:13,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:13,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:13,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:13,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:13,241 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:13,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:08:13,245 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:13,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:13,249 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:13,301 INFO L628 ElimStorePlain]: treesize reduction 30, result has 56.5 percent of original size [2021-03-10 22:08:13,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:08:13,302 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:112, output treesize:39 [2021-03-10 22:08:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:08:13,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:13,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 22:08:13,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116960981] [2021-03-10 22:08:13,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:08:13,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:13,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:08:13,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:13,388 INFO L87 Difference]: Start difference. First operand 894 states and 3156 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:13,928 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-10 22:08:14,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:14,580 INFO L93 Difference]: Finished difference Result 1331 states and 4371 transitions. [2021-03-10 22:08:14,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:08:14,581 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:14,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:14,583 INFO L225 Difference]: With dead ends: 1331 [2021-03-10 22:08:14,583 INFO L226 Difference]: Without dead ends: 1271 [2021-03-10 22:08:14,583 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1060.5ms TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:08:14,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-03-10 22:08:14,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 908. [2021-03-10 22:08:14,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 3.5402425578831314) internal successors, (3211), 907 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:14,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 3211 transitions. [2021-03-10 22:08:14,594 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 3211 transitions. Word has length 21 [2021-03-10 22:08:14,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:14,594 INFO L480 AbstractCegarLoop]: Abstraction has 908 states and 3211 transitions. [2021-03-10 22:08:14,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:14,594 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 3211 transitions. [2021-03-10 22:08:14,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:14,595 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:14,595 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:14,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6580,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:14,796 INFO L428 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:14,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:14,796 INFO L82 PathProgramCache]: Analyzing trace with hash 830590149, now seen corresponding path program 17 times [2021-03-10 22:08:14,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:14,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316357882] [2021-03-10 22:08:14,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:14,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316357882] [2021-03-10 22:08:14,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805562943] [2021-03-10 22:08:14,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:15,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:08:15,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:15,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:15,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:15,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:08:15,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:15,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:08:15,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:15,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:08:15,177 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:15,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:08:15,181 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:15,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:08:15,186 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:15,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:08:15,190 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:15,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:08:15,194 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:15,287 INFO L628 ElimStorePlain]: treesize reduction 51, result has 61.9 percent of original size [2021-03-10 22:08:15,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:08:15,289 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:251, output treesize:83 [2021-03-10 22:08:15,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:15,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:15,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-03-10 22:08:15,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811624856] [2021-03-10 22:08:15,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:08:15,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:15,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:08:15,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:08:15,524 INFO L87 Difference]: Start difference. First operand 908 states and 3211 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:16,060 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 22:08:16,337 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 22:08:16,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:16,723 INFO L93 Difference]: Finished difference Result 1255 states and 4177 transitions. [2021-03-10 22:08:16,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:08:16,723 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:16,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:16,725 INFO L225 Difference]: With dead ends: 1255 [2021-03-10 22:08:16,725 INFO L226 Difference]: Without dead ends: 1198 [2021-03-10 22:08:16,725 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1146.1ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:08:16,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2021-03-10 22:08:16,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 912. [2021-03-10 22:08:16,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 3.548847420417124) internal successors, (3233), 911 states have internal predecessors, (3233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:16,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 3233 transitions. [2021-03-10 22:08:16,735 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 3233 transitions. Word has length 21 [2021-03-10 22:08:16,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:16,736 INFO L480 AbstractCegarLoop]: Abstraction has 912 states and 3233 transitions. [2021-03-10 22:08:16,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:16,736 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 3233 transitions. [2021-03-10 22:08:16,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:16,737 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:16,737 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:16,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6593,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:16,937 INFO L428 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:16,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:16,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1509059861, now seen corresponding path program 18 times [2021-03-10 22:08:16,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:16,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908783736] [2021-03-10 22:08:16,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:17,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908783736] [2021-03-10 22:08:17,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832212346] [2021-03-10 22:08:17,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:17,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:08:17,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:17,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:08:17,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:17,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:17,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:17,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 22:08:17,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98212005] [2021-03-10 22:08:17,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:08:17,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:17,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:08:17,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:17,364 INFO L87 Difference]: Start difference. First operand 912 states and 3233 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:17,920 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 22:08:18,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:18,348 INFO L93 Difference]: Finished difference Result 1195 states and 4022 transitions. [2021-03-10 22:08:18,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:08:18,349 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:18,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:18,350 INFO L225 Difference]: With dead ends: 1195 [2021-03-10 22:08:18,350 INFO L226 Difference]: Without dead ends: 1153 [2021-03-10 22:08:18,351 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 880.5ms TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:08:18,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-03-10 22:08:18,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 910. [2021-03-10 22:08:18,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.551155115511551) internal successors, (3228), 909 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:18,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3228 transitions. [2021-03-10 22:08:18,361 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3228 transitions. Word has length 21 [2021-03-10 22:08:18,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:18,361 INFO L480 AbstractCegarLoop]: Abstraction has 910 states and 3228 transitions. [2021-03-10 22:08:18,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:18,361 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3228 transitions. [2021-03-10 22:08:18,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:18,362 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:18,362 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:18,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6613,636 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:18,563 INFO L428 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:18,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:18,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1172547695, now seen corresponding path program 19 times [2021-03-10 22:08:18,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:18,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788644003] [2021-03-10 22:08:18,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:18,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788644003] [2021-03-10 22:08:18,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852183094] [2021-03-10 22:08:18,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:18,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:08:18,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:18,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:18,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:18,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:18,846 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:18,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:08:18,850 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:18,852 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:18,853 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:18,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:18,857 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:18,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:18,861 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:18,864 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:18,865 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:18,913 INFO L628 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2021-03-10 22:08:18,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:08:18,914 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:136, output treesize:40 [2021-03-10 22:08:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:19,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:19,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-03-10 22:08:19,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009021512] [2021-03-10 22:08:19,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:08:19,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:19,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:08:19,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:08:19,013 INFO L87 Difference]: Start difference. First operand 910 states and 3228 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:20,224 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-10 22:08:20,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:20,823 INFO L93 Difference]: Finished difference Result 1669 states and 5394 transitions. [2021-03-10 22:08:20,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:08:20,824 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:20,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:20,826 INFO L225 Difference]: With dead ends: 1669 [2021-03-10 22:08:20,826 INFO L226 Difference]: Without dead ends: 1440 [2021-03-10 22:08:20,826 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1249.2ms TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:08:20,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-03-10 22:08:20,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 936. [2021-03-10 22:08:20,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 3.568983957219251) internal successors, (3337), 935 states have internal predecessors, (3337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:20,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 3337 transitions. [2021-03-10 22:08:20,838 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 3337 transitions. Word has length 21 [2021-03-10 22:08:20,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:20,838 INFO L480 AbstractCegarLoop]: Abstraction has 936 states and 3337 transitions. [2021-03-10 22:08:20,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:20,839 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 3337 transitions. [2021-03-10 22:08:20,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:20,840 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:20,840 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:21,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6619,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:21,040 INFO L428 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:21,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:21,040 INFO L82 PathProgramCache]: Analyzing trace with hash -744153, now seen corresponding path program 20 times [2021-03-10 22:08:21,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:21,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310984761] [2021-03-10 22:08:21,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:21,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310984761] [2021-03-10 22:08:21,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363569121] [2021-03-10 22:08:21,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:21,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:21,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:21,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 22:08:21,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:21,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:21,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:21,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:08:21,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:21,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:21,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:21,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:21,452 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:21,505 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.5 percent of original size [2021-03-10 22:08:21,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:08:21,506 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:75, output treesize:42 [2021-03-10 22:08:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:21,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:21,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:08:21,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795982630] [2021-03-10 22:08:21,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:08:21,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:21,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:08:21,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:08:21,599 INFO L87 Difference]: Start difference. First operand 936 states and 3337 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:22,098 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 22:08:22,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:22,631 INFO L93 Difference]: Finished difference Result 1189 states and 4003 transitions. [2021-03-10 22:08:22,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:08:22,632 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:22,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:22,633 INFO L225 Difference]: With dead ends: 1189 [2021-03-10 22:08:22,634 INFO L226 Difference]: Without dead ends: 1013 [2021-03-10 22:08:22,634 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 893.7ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:08:22,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-03-10 22:08:22,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 942. [2021-03-10 22:08:22,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 3.563230605738576) internal successors, (3353), 941 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:22,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 3353 transitions. [2021-03-10 22:08:22,644 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 3353 transitions. Word has length 21 [2021-03-10 22:08:22,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:22,644 INFO L480 AbstractCegarLoop]: Abstraction has 942 states and 3353 transitions. [2021-03-10 22:08:22,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:22,644 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 3353 transitions. [2021-03-10 22:08:22,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:22,645 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:22,645 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:22,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 638 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6629 [2021-03-10 22:08:22,845 INFO L428 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:22,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:22,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1817832945, now seen corresponding path program 21 times [2021-03-10 22:08:22,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:22,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762057867] [2021-03-10 22:08:22,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:22,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762057867] [2021-03-10 22:08:22,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141023046] [2021-03-10 22:08:22,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:23,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:08:23,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:23,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 22:08:23,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:23,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:23,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:23,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:08:23,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:23,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:23,260 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:23,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:23,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:23,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:23,271 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:23,275 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:23,276 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:23,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:23,281 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:23,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:23,286 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:23,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:23,292 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:23,295 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:23,296 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:23,389 INFO L628 ElimStorePlain]: treesize reduction 53, result has 55.8 percent of original size [2021-03-10 22:08:23,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:08:23,390 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 1 variables, input treesize:244, output treesize:67 [2021-03-10 22:08:23,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:23,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:23,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:08:23,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498886143] [2021-03-10 22:08:23,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:08:23,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:23,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:08:23,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:08:23,550 INFO L87 Difference]: Start difference. First operand 942 states and 3353 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:24,050 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-10 22:08:24,224 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-10 22:08:24,347 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-10 22:08:24,660 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 22:08:25,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:25,059 INFO L93 Difference]: Finished difference Result 1366 states and 4493 transitions. [2021-03-10 22:08:25,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:08:25,060 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:25,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:25,062 INFO L225 Difference]: With dead ends: 1366 [2021-03-10 22:08:25,062 INFO L226 Difference]: Without dead ends: 1199 [2021-03-10 22:08:25,062 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1339.1ms TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:08:25,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-03-10 22:08:25,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 951. [2021-03-10 22:08:25,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 3.5652631578947367) internal successors, (3387), 950 states have internal predecessors, (3387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:25,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 3387 transitions. [2021-03-10 22:08:25,074 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 3387 transitions. Word has length 21 [2021-03-10 22:08:25,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:25,074 INFO L480 AbstractCegarLoop]: Abstraction has 951 states and 3387 transitions. [2021-03-10 22:08:25,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:25,074 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 3387 transitions. [2021-03-10 22:08:25,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:25,075 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:25,075 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:25,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6640,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:25,276 INFO L428 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:25,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:25,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1725733913, now seen corresponding path program 22 times [2021-03-10 22:08:25,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:25,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787802067] [2021-03-10 22:08:25,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:25,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787802067] [2021-03-10 22:08:25,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718103972] [2021-03-10 22:08:25,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:25,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:08:25,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:25,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:08:25,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:25,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:25,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:25,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:25,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:25,615 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,618 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:25,619 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,622 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:25,623 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:08:25,628 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,630 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:25,631 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:25,636 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:25,706 INFO L628 ElimStorePlain]: treesize reduction 19, result has 74.7 percent of original size [2021-03-10 22:08:25,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:08:25,707 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:216, output treesize:56 [2021-03-10 22:08:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:25,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:25,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 22:08:25,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90120409] [2021-03-10 22:08:25,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:08:25,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:25,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:08:25,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:25,860 INFO L87 Difference]: Start difference. First operand 951 states and 3387 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:26,272 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 22:08:26,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:26,900 INFO L93 Difference]: Finished difference Result 1394 states and 4627 transitions. [2021-03-10 22:08:26,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:08:26,900 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:26,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:26,902 INFO L225 Difference]: With dead ends: 1394 [2021-03-10 22:08:26,902 INFO L226 Difference]: Without dead ends: 1301 [2021-03-10 22:08:26,902 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 889.7ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:08:26,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-03-10 22:08:26,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 950. [2021-03-10 22:08:26,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 3.5637513171759747) internal successors, (3382), 949 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 3382 transitions. [2021-03-10 22:08:26,914 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 3382 transitions. Word has length 21 [2021-03-10 22:08:26,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:26,914 INFO L480 AbstractCegarLoop]: Abstraction has 950 states and 3382 transitions. [2021-03-10 22:08:26,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:26,915 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 3382 transitions. [2021-03-10 22:08:26,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:26,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:26,916 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:27,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6657,640 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:27,116 INFO L428 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:27,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:27,116 INFO L82 PathProgramCache]: Analyzing trace with hash 937380569, now seen corresponding path program 23 times [2021-03-10 22:08:27,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:27,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247986096] [2021-03-10 22:08:27,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:08:27,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247986096] [2021-03-10 22:08:27,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413256054] [2021-03-10 22:08:27,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:27,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:08:27,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:27,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 22:08:27,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:27,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:27,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:27,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:27,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:27,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:08:27,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:27,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:27,515 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:27,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:27,519 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:27,574 INFO L628 ElimStorePlain]: treesize reduction 14, result has 75.0 percent of original size [2021-03-10 22:08:27,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:08:27,575 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:99, output treesize:42 [2021-03-10 22:08:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:27,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:27,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-03-10 22:08:27,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790296484] [2021-03-10 22:08:27,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:08:27,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:27,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:08:27,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:08:27,662 INFO L87 Difference]: Start difference. First operand 950 states and 3382 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:28,096 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-10 22:08:28,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:28,606 INFO L93 Difference]: Finished difference Result 1403 states and 4693 transitions. [2021-03-10 22:08:28,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:08:28,607 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:28,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:28,608 INFO L225 Difference]: With dead ends: 1403 [2021-03-10 22:08:28,608 INFO L226 Difference]: Without dead ends: 1275 [2021-03-10 22:08:28,609 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 731.3ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:08:28,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-03-10 22:08:28,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 972. [2021-03-10 22:08:28,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 3.575695159629248) internal successors, (3472), 971 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 3472 transitions. [2021-03-10 22:08:28,620 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 3472 transitions. Word has length 21 [2021-03-10 22:08:28,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:28,620 INFO L480 AbstractCegarLoop]: Abstraction has 972 states and 3472 transitions. [2021-03-10 22:08:28,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:28,620 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 3472 transitions. [2021-03-10 22:08:28,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:28,621 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:28,621 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:28,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6669 [2021-03-10 22:08:28,822 INFO L428 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:28,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:28,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1262049945, now seen corresponding path program 24 times [2021-03-10 22:08:28,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:28,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166440223] [2021-03-10 22:08:28,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:28,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166440223] [2021-03-10 22:08:28,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583445947] [2021-03-10 22:08:28,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:28,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:08:28,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:28,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 22:08:28,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:29,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:29,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:08:29,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:29,183 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:29,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,190 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:29,191 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:29,195 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:29,199 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:29,202 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,205 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:29,206 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:29,209 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,296 INFO L628 ElimStorePlain]: treesize reduction 52, result has 56.3 percent of original size [2021-03-10 22:08:29,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:08:29,297 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 1 variables, input treesize:250, output treesize:67 [2021-03-10 22:08:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:29,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:29,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-03-10 22:08:29,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050217607] [2021-03-10 22:08:29,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:08:29,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:29,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:08:29,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:08:29,453 INFO L87 Difference]: Start difference. First operand 972 states and 3472 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:29,896 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-10 22:08:30,525 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-03-10 22:08:30,676 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-03-10 22:08:31,007 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 22:08:31,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:31,286 INFO L93 Difference]: Finished difference Result 1577 states and 5144 transitions. [2021-03-10 22:08:31,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 22:08:31,287 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:31,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:31,289 INFO L225 Difference]: With dead ends: 1577 [2021-03-10 22:08:31,289 INFO L226 Difference]: Without dead ends: 1362 [2021-03-10 22:08:31,289 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1488.0ms TimeCoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:08:31,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-03-10 22:08:31,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 964. [2021-03-10 22:08:31,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 3.572170301142264) internal successors, (3440), 963 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:31,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 3440 transitions. [2021-03-10 22:08:31,302 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 3440 transitions. Word has length 21 [2021-03-10 22:08:31,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:31,302 INFO L480 AbstractCegarLoop]: Abstraction has 964 states and 3440 transitions. [2021-03-10 22:08:31,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:31,302 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 3440 transitions. [2021-03-10 22:08:31,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:31,303 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:31,303 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:31,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6678,642 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:31,504 INFO L428 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:31,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:31,504 INFO L82 PathProgramCache]: Analyzing trace with hash 345213529, now seen corresponding path program 25 times [2021-03-10 22:08:31,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:31,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142690396] [2021-03-10 22:08:31,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:31,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:31,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142690396] [2021-03-10 22:08:31,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138614126] [2021-03-10 22:08:31,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:31,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 22:08:31,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:31,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:31,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-03-10 22:08:31,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533814239] [2021-03-10 22:08:31,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:08:31,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:31,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:08:31,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:08:31,975 INFO L87 Difference]: Start difference. First operand 964 states and 3440 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:32,633 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-10 22:08:32,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:32,884 INFO L93 Difference]: Finished difference Result 1249 states and 4187 transitions. [2021-03-10 22:08:32,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:08:32,885 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:32,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:32,886 INFO L225 Difference]: With dead ends: 1249 [2021-03-10 22:08:32,886 INFO L226 Difference]: Without dead ends: 1043 [2021-03-10 22:08:32,886 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 880.2ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:08:32,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-03-10 22:08:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 948. [2021-03-10 22:08:32,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 947 states have (on average 3.5712777191129885) internal successors, (3382), 947 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:32,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 3382 transitions. [2021-03-10 22:08:32,896 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 3382 transitions. Word has length 21 [2021-03-10 22:08:32,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:32,896 INFO L480 AbstractCegarLoop]: Abstraction has 948 states and 3382 transitions. [2021-03-10 22:08:32,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:32,896 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 3382 transitions. [2021-03-10 22:08:32,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:32,897 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:32,897 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:33,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 643 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6696 [2021-03-10 22:08:33,097 INFO L428 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:33,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:33,097 INFO L82 PathProgramCache]: Analyzing trace with hash -141814443, now seen corresponding path program 26 times [2021-03-10 22:08:33,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:33,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925231036] [2021-03-10 22:08:33,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:33,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925231036] [2021-03-10 22:08:33,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513358507] [2021-03-10 22:08:33,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:33,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:33,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:33,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:08:33,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:33,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:33,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:33,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:33,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:33,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:33,427 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:33,457 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-03-10 22:08:33,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:08:33,458 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-03-10 22:08:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:33,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:33,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-03-10 22:08:33,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140389825] [2021-03-10 22:08:33,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:08:33,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:33,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:08:33,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:08:33,518 INFO L87 Difference]: Start difference. First operand 948 states and 3382 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:34,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:34,949 INFO L93 Difference]: Finished difference Result 1849 states and 5960 transitions. [2021-03-10 22:08:34,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:08:34,949 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:34,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:34,951 INFO L225 Difference]: With dead ends: 1849 [2021-03-10 22:08:34,951 INFO L226 Difference]: Without dead ends: 1650 [2021-03-10 22:08:34,952 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 920.5ms TimeCoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:08:34,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-03-10 22:08:34,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 965. [2021-03-10 22:08:34,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 3.565352697095436) internal successors, (3437), 964 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:34,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 3437 transitions. [2021-03-10 22:08:34,964 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 3437 transitions. Word has length 21 [2021-03-10 22:08:34,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:34,964 INFO L480 AbstractCegarLoop]: Abstraction has 965 states and 3437 transitions. [2021-03-10 22:08:34,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:34,965 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 3437 transitions. [2021-03-10 22:08:34,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:34,966 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:34,966 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:35,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6710,644 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:35,166 INFO L428 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:35,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:35,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1003780313, now seen corresponding path program 27 times [2021-03-10 22:08:35,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:35,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135536502] [2021-03-10 22:08:35,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:35,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135536502] [2021-03-10 22:08:35,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072740671] [2021-03-10 22:08:35,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:35,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:08:35,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:35,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 22:08:35,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:35,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:35,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:35,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:08:35,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:35,604 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:35,605 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:35,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:35,609 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:35,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:35,613 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:35,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:35,617 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:35,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:35,621 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:35,624 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:35,625 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:35,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:35,628 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:35,630 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:35,631 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:35,714 INFO L628 ElimStorePlain]: treesize reduction 24, result has 73.6 percent of original size [2021-03-10 22:08:35,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:08:35,715 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 1 variables, input treesize:229, output treesize:67 [2021-03-10 22:08:35,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:35,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:35,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:08:35,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183066308] [2021-03-10 22:08:35,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:08:35,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:35,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:08:35,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:35,869 INFO L87 Difference]: Start difference. First operand 965 states and 3437 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:36,312 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-10 22:08:36,530 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-10 22:08:36,687 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-10 22:08:37,387 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-03-10 22:08:37,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:37,410 INFO L93 Difference]: Finished difference Result 1521 states and 4995 transitions. [2021-03-10 22:08:37,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:08:37,411 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:37,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:37,413 INFO L225 Difference]: With dead ends: 1521 [2021-03-10 22:08:37,413 INFO L226 Difference]: Without dead ends: 1350 [2021-03-10 22:08:37,413 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1329.8ms TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:08:37,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-03-10 22:08:37,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 975. [2021-03-10 22:08:37,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 3.5677618069815193) internal successors, (3475), 974 states have internal predecessors, (3475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:37,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 3475 transitions. [2021-03-10 22:08:37,425 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 3475 transitions. Word has length 21 [2021-03-10 22:08:37,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:37,425 INFO L480 AbstractCegarLoop]: Abstraction has 975 states and 3475 transitions. [2021-03-10 22:08:37,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:37,425 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 3475 transitions. [2021-03-10 22:08:37,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:37,426 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:37,427 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:37,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6717 [2021-03-10 22:08:37,627 INFO L428 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:37,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:37,627 INFO L82 PathProgramCache]: Analyzing trace with hash -252379875, now seen corresponding path program 28 times [2021-03-10 22:08:37,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:37,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086416583] [2021-03-10 22:08:37,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:37,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:37,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086416583] [2021-03-10 22:08:37,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938967212] [2021-03-10 22:08:37,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:37,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:08:37,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:37,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:08:37,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:37,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:08:37,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:37,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:08:37,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:37,972 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:37,973 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:37,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:37,977 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:37,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:08:37,981 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:37,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:08:37,985 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:37,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:08:37,989 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:37,991 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:37,992 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:37,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:08:37,996 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:37,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:08:38,000 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:38,103 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-03-10 22:08:38,103 INFO L628 ElimStorePlain]: treesize reduction 58, result has 62.6 percent of original size [2021-03-10 22:08:38,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:08:38,104 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 1 variables, input treesize:330, output treesize:97 [2021-03-10 22:08:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:38,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:38,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2021-03-10 22:08:38,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800997574] [2021-03-10 22:08:38,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:08:38,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:38,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:08:38,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:08:38,299 INFO L87 Difference]: Start difference. First operand 975 states and 3475 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:38,893 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-03-10 22:08:39,137 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-03-10 22:08:39,298 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-03-10 22:08:39,485 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-10 22:08:39,737 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-10 22:08:40,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:40,207 INFO L93 Difference]: Finished difference Result 1728 states and 5560 transitions. [2021-03-10 22:08:40,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:08:40,208 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:40,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:40,210 INFO L225 Difference]: With dead ends: 1728 [2021-03-10 22:08:40,210 INFO L226 Difference]: Without dead ends: 1526 [2021-03-10 22:08:40,210 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1670.9ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:08:40,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-03-10 22:08:40,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 978. [2021-03-10 22:08:40,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 3.5680655066530194) internal successors, (3486), 977 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 3486 transitions. [2021-03-10 22:08:40,223 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 3486 transitions. Word has length 21 [2021-03-10 22:08:40,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:40,223 INFO L480 AbstractCegarLoop]: Abstraction has 978 states and 3486 transitions. [2021-03-10 22:08:40,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:40,223 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 3486 transitions. [2021-03-10 22:08:40,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:40,224 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:40,224 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:40,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6733,646 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:40,425 INFO L428 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:40,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:40,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1098113337, now seen corresponding path program 29 times [2021-03-10 22:08:40,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:40,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240980579] [2021-03-10 22:08:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:08:40,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240980579] [2021-03-10 22:08:40,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261433935] [2021-03-10 22:08:40,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:40,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:08:40,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:40,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:08:40,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:40,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:40,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:40,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:40,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:40,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:40,675 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:40,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:08:40,679 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:40,682 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:40,682 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:40,726 INFO L628 ElimStorePlain]: treesize reduction 14, result has 73.6 percent of original size [2021-03-10 22:08:40,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:08:40,727 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:116, output treesize:39 [2021-03-10 22:08:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:08:40,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:40,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:08:40,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216154008] [2021-03-10 22:08:40,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:40,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:40,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:40,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:40,839 INFO L87 Difference]: Start difference. First operand 978 states and 3486 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:41,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:41,860 INFO L93 Difference]: Finished difference Result 2011 states and 6535 transitions. [2021-03-10 22:08:41,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:08:41,861 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:41,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:41,863 INFO L225 Difference]: With dead ends: 2011 [2021-03-10 22:08:41,863 INFO L226 Difference]: Without dead ends: 1821 [2021-03-10 22:08:41,863 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 723.0ms TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:08:41,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-03-10 22:08:41,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 967. [2021-03-10 22:08:41,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 3.567287784679089) internal successors, (3446), 966 states have internal predecessors, (3446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:41,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 3446 transitions. [2021-03-10 22:08:41,877 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 3446 transitions. Word has length 21 [2021-03-10 22:08:41,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:41,877 INFO L480 AbstractCegarLoop]: Abstraction has 967 states and 3446 transitions. [2021-03-10 22:08:41,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:41,877 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 3446 transitions. [2021-03-10 22:08:41,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:41,878 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:41,879 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:42,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6750,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:42,079 INFO L428 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:42,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:42,079 INFO L82 PathProgramCache]: Analyzing trace with hash 989891146, now seen corresponding path program 616 times [2021-03-10 22:08:42,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:42,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702618254] [2021-03-10 22:08:42,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:42,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:42,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702618254] [2021-03-10 22:08:42,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269511286] [2021-03-10 22:08:42,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:42,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:08:42,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:42,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:42,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:42,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-03-10 22:08:42,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:08:42,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-03-10 22:08:42,686 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,762 INFO L628 ElimStorePlain]: treesize reduction 42, result has 65.0 percent of original size [2021-03-10 22:08:42,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:08:42,766 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:42,770 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:42,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:08:42,806 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:207, output treesize:48 [2021-03-10 22:08:42,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:42,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:42,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-03-10 22:08:42,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36479270] [2021-03-10 22:08:42,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:08:42,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:42,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:08:42,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:08:42,982 INFO L87 Difference]: Start difference. First operand 967 states and 3446 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:43,442 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-03-10 22:08:44,157 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 22:08:44,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:44,379 INFO L93 Difference]: Finished difference Result 1210 states and 4184 transitions. [2021-03-10 22:08:44,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:08:44,380 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:44,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:44,381 INFO L225 Difference]: With dead ends: 1210 [2021-03-10 22:08:44,381 INFO L226 Difference]: Without dead ends: 1141 [2021-03-10 22:08:44,382 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1184.6ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:08:44,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2021-03-10 22:08:44,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 981. [2021-03-10 22:08:44,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 3.5724489795918366) internal successors, (3501), 980 states have internal predecessors, (3501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:44,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 3501 transitions. [2021-03-10 22:08:44,398 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 3501 transitions. Word has length 21 [2021-03-10 22:08:44,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:44,398 INFO L480 AbstractCegarLoop]: Abstraction has 981 states and 3501 transitions. [2021-03-10 22:08:44,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:44,398 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 3501 transitions. [2021-03-10 22:08:44,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:44,399 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:44,399 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:44,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6766,648 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:44,599 INFO L428 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:44,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:44,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1531206336, now seen corresponding path program 617 times [2021-03-10 22:08:44,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:44,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032760884] [2021-03-10 22:08:44,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:44,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032760884] [2021-03-10 22:08:44,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944324760] [2021-03-10 22:08:44,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:44,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:44,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:44,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:08:44,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:45,150 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_167, v_prenex_168, v_prenex_169], 1=[nondet_0]} [2021-03-10 22:08:45,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:08:45,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,251 INFO L628 ElimStorePlain]: treesize reduction 63, result has 58.3 percent of original size [2021-03-10 22:08:45,251 INFO L518 ElimStorePlain]: Eliminatee v_prenex_168 vanished before elimination [2021-03-10 22:08:45,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:45,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,331 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.7 percent of original size [2021-03-10 22:08:45,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:45,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:45,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:08:45,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:45,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:45,340 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,399 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.2 percent of original size [2021-03-10 22:08:45,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:08:45,401 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:156, output treesize:43 [2021-03-10 22:08:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:45,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:45,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-10 22:08:45,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67537867] [2021-03-10 22:08:45,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:08:45,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:45,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:08:45,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:08:45,495 INFO L87 Difference]: Start difference. First operand 981 states and 3501 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:46,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:46,375 INFO L93 Difference]: Finished difference Result 1217 states and 4205 transitions. [2021-03-10 22:08:46,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:08:46,375 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:46,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:46,377 INFO L225 Difference]: With dead ends: 1217 [2021-03-10 22:08:46,377 INFO L226 Difference]: Without dead ends: 1170 [2021-03-10 22:08:46,377 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 763.8ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:08:46,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-03-10 22:08:46,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 973. [2021-03-10 22:08:46,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 972 states have (on average 3.566872427983539) internal successors, (3467), 972 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:46,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 3467 transitions. [2021-03-10 22:08:46,388 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 3467 transitions. Word has length 21 [2021-03-10 22:08:46,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:46,388 INFO L480 AbstractCegarLoop]: Abstraction has 973 states and 3467 transitions. [2021-03-10 22:08:46,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:46,388 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 3467 transitions. [2021-03-10 22:08:46,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:46,389 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:46,389 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:46,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6816,649 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:46,589 INFO L428 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:46,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:46,589 INFO L82 PathProgramCache]: Analyzing trace with hash -945183862, now seen corresponding path program 618 times [2021-03-10 22:08:46,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:46,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843061212] [2021-03-10 22:08:46,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:46,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843061212] [2021-03-10 22:08:46,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466725856] [2021-03-10 22:08:46,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:46,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:08:46,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:46,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 22:08:46,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:47,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:47,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:47,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-03-10 22:08:47,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:47,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:47,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:47,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:08:47,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:47,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:47,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:08:47,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:47,441 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-03-10 22:08:47,441 INFO L628 ElimStorePlain]: treesize reduction 150, result has 53.0 percent of original size [2021-03-10 22:08:47,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:47,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:47,447 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:47,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:47,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:47,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:47,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:08:47,545 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:47,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:47,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:47,552 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:47,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:47,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:08:47,639 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:400, output treesize:108 [2021-03-10 22:08:47,771 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 22:08:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:47,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:47,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-10 22:08:47,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331784500] [2021-03-10 22:08:47,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:08:47,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:47,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:08:47,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:08:47,901 INFO L87 Difference]: Start difference. First operand 973 states and 3467 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:48,554 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 22:08:48,836 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 22:08:49,106 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 22:08:49,348 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-03-10 22:08:49,586 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-03-10 22:08:49,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:49,657 INFO L93 Difference]: Finished difference Result 1238 states and 4233 transitions. [2021-03-10 22:08:49,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:08:49,658 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:49,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:49,660 INFO L225 Difference]: With dead ends: 1238 [2021-03-10 22:08:49,660 INFO L226 Difference]: Without dead ends: 1144 [2021-03-10 22:08:49,660 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1837.9ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:08:49,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-03-10 22:08:49,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 973. [2021-03-10 22:08:49,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 972 states have (on average 3.566872427983539) internal successors, (3467), 972 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:49,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 3467 transitions. [2021-03-10 22:08:49,670 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 3467 transitions. Word has length 21 [2021-03-10 22:08:49,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:49,670 INFO L480 AbstractCegarLoop]: Abstraction has 973 states and 3467 transitions. [2021-03-10 22:08:49,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:49,670 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 3467 transitions. [2021-03-10 22:08:49,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:49,671 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:49,671 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:49,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 650 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6849 [2021-03-10 22:08:49,872 INFO L428 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:49,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:49,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1288143382, now seen corresponding path program 619 times [2021-03-10 22:08:49,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:49,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616103968] [2021-03-10 22:08:49,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:50,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616103968] [2021-03-10 22:08:50,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190388566] [2021-03-10 22:08:50,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:50,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:50,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:50,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:50,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:50,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:08:50,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:50,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:50,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:50,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-03-10 22:08:50,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:50,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:50,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:50,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:08:50,668 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:50,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:50,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:50,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:50,673 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:50,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:50,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:50,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:08:50,679 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:50,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:50,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:50,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-03-10 22:08:50,684 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:50,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:50,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:50,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-03-10 22:08:50,689 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:50,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:50,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:08:50,693 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:50,787 INFO L628 ElimStorePlain]: treesize reduction 73, result has 55.2 percent of original size [2021-03-10 22:08:50,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:08:50,789 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:347, output treesize:48 [2021-03-10 22:08:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:50,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:50,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-03-10 22:08:50,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555195358] [2021-03-10 22:08:50,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:08:50,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:50,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:08:50,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:08:50,952 INFO L87 Difference]: Start difference. First operand 973 states and 3467 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:51,228 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-10 22:08:51,452 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2021-03-10 22:08:51,996 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 22:08:52,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:52,201 INFO L93 Difference]: Finished difference Result 1224 states and 4217 transitions. [2021-03-10 22:08:52,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:08:52,201 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:52,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:52,203 INFO L225 Difference]: With dead ends: 1224 [2021-03-10 22:08:52,203 INFO L226 Difference]: Without dead ends: 1155 [2021-03-10 22:08:52,203 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1193.3ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:08:52,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-03-10 22:08:52,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 982. [2021-03-10 22:08:52,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 3.570846075433231) internal successors, (3503), 981 states have internal predecessors, (3503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 3503 transitions. [2021-03-10 22:08:52,214 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 3503 transitions. Word has length 21 [2021-03-10 22:08:52,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:52,214 INFO L480 AbstractCegarLoop]: Abstraction has 982 states and 3503 transitions. [2021-03-10 22:08:52,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:52,214 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 3503 transitions. [2021-03-10 22:08:52,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:52,215 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:52,215 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:52,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 651 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6892 [2021-03-10 22:08:52,416 INFO L428 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:52,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:52,416 INFO L82 PathProgramCache]: Analyzing trace with hash 530433716, now seen corresponding path program 620 times [2021-03-10 22:08:52,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:52,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644744869] [2021-03-10 22:08:52,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:52,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644744869] [2021-03-10 22:08:52,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781432939] [2021-03-10 22:08:52,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:52,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:52,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:52,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 22:08:52,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:53,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:08:53,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:08:53,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-03-10 22:08:53,138 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-03-10 22:08:53,146 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:08:53,156 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:08:53,165 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-03-10 22:08:53,173 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-03-10 22:08:53,182 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:08:53,191 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:08:53,200 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:08:53,208 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:53,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-03-10 22:08:53,215 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:53,421 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-03-10 22:08:53,421 INFO L628 ElimStorePlain]: treesize reduction 75, result has 71.5 percent of original size [2021-03-10 22:08:53,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:08:53,423 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:640, output treesize:108 [2021-03-10 22:08:53,555 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 22:08:53,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:53,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:53,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:08:53,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143117619] [2021-03-10 22:08:53,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:53,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:53,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:53,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:53,682 INFO L87 Difference]: Start difference. First operand 982 states and 3503 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:53,977 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-03-10 22:08:54,227 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 22:08:54,433 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-03-10 22:08:54,651 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-03-10 22:08:54,847 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-03-10 22:08:55,040 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-10 22:08:55,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:55,119 INFO L93 Difference]: Finished difference Result 1251 states and 4261 transitions. [2021-03-10 22:08:55,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:08:55,120 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:55,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:55,122 INFO L225 Difference]: With dead ends: 1251 [2021-03-10 22:08:55,122 INFO L226 Difference]: Without dead ends: 1157 [2021-03-10 22:08:55,122 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1482.5ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:08:55,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2021-03-10 22:08:55,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 982. [2021-03-10 22:08:55,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 3.570846075433231) internal successors, (3503), 981 states have internal predecessors, (3503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:55,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 3503 transitions. [2021-03-10 22:08:55,133 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 3503 transitions. Word has length 21 [2021-03-10 22:08:55,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:55,133 INFO L480 AbstractCegarLoop]: Abstraction has 982 states and 3503 transitions. [2021-03-10 22:08:55,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:55,133 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 3503 transitions. [2021-03-10 22:08:55,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:55,134 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:55,134 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:55,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6950 [2021-03-10 22:08:55,335 INFO L428 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:55,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:55,335 INFO L82 PathProgramCache]: Analyzing trace with hash -530344374, now seen corresponding path program 621 times [2021-03-10 22:08:55,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:55,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397872812] [2021-03-10 22:08:55,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:55,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397872812] [2021-03-10 22:08:55,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695853666] [2021-03-10 22:08:55,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:55,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:08:55,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:55,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:08:55,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:56,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:08:56,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:56,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:08:56,087 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:08:56,094 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-03-10 22:08:56,102 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,106 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:56,107 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:08:56,114 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:08:56,121 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,125 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:56,126 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,283 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-03-10 22:08:56,283 INFO L628 ElimStorePlain]: treesize reduction 46, result has 76.0 percent of original size [2021-03-10 22:08:56,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:08:56,285 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:457, output treesize:82 [2021-03-10 22:08:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:56,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:56,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:08:56,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219063282] [2021-03-10 22:08:56,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:56,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:56,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:56,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:56,474 INFO L87 Difference]: Start difference. First operand 982 states and 3503 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:56,938 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 22:08:57,159 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-10 22:08:57,332 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 22:08:57,519 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-03-10 22:08:57,685 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-03-10 22:08:57,931 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-10 22:08:57,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:57,942 INFO L93 Difference]: Finished difference Result 1396 states and 4686 transitions. [2021-03-10 22:08:57,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:08:57,943 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:08:57,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:57,945 INFO L225 Difference]: With dead ends: 1396 [2021-03-10 22:08:57,945 INFO L226 Difference]: Without dead ends: 1302 [2021-03-10 22:08:57,945 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1439.3ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:08:57,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-03-10 22:08:57,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1004. [2021-03-10 22:08:57,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 3.604187437686939) internal successors, (3615), 1003 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:57,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 3615 transitions. [2021-03-10 22:08:57,957 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 3615 transitions. Word has length 21 [2021-03-10 22:08:57,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:57,957 INFO L480 AbstractCegarLoop]: Abstraction has 1004 states and 3615 transitions. [2021-03-10 22:08:57,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:57,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 3615 transitions. [2021-03-10 22:08:57,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:08:57,958 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:57,958 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:58,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7023,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:58,158 INFO L428 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:58,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:58,159 INFO L82 PathProgramCache]: Analyzing trace with hash 889543274, now seen corresponding path program 622 times [2021-03-10 22:08:58,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:58,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105431353] [2021-03-10 22:08:58,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:58,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105431353] [2021-03-10 22:08:58,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891810121] [2021-03-10 22:08:58,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:58,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:08:58,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:58,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:58,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:58,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:58,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:58,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:08:58,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:58,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:58,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:58,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:08:58,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:58,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:58,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:58,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-03-10 22:08:58,826 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:58,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:58,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:58,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:08:58,831 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:58,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:58,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:58,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:08:58,836 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:58,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:58,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:08:58,840 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:58,943 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 22:08:58,943 INFO L628 ElimStorePlain]: treesize reduction 40, result has 71.2 percent of original size [2021-03-10 22:08:58,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:08:58,945 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:267, output treesize:57 [2021-03-10 22:08:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:59,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:59,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-03-10 22:08:59,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518849160] [2021-03-10 22:08:59,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:08:59,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:59,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:08:59,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:08:59,159 INFO L87 Difference]: Start difference. First operand 1004 states and 3615 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:59,491 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 22:08:59,671 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-03-10 22:09:00,141 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 22:09:00,289 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-03-10 22:09:00,432 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-10 22:09:00,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:00,472 INFO L93 Difference]: Finished difference Result 1287 states and 4376 transitions. [2021-03-10 22:09:00,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:09:00,472 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:09:00,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:00,474 INFO L225 Difference]: With dead ends: 1287 [2021-03-10 22:09:00,474 INFO L226 Difference]: Without dead ends: 1218 [2021-03-10 22:09:00,474 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1314.5ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:09:00,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2021-03-10 22:09:00,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 956. [2021-03-10 22:09:00,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 3.56020942408377) internal successors, (3400), 955 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:00,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 3400 transitions. [2021-03-10 22:09:00,486 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 3400 transitions. Word has length 21 [2021-03-10 22:09:00,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:00,486 INFO L480 AbstractCegarLoop]: Abstraction has 956 states and 3400 transitions. [2021-03-10 22:09:00,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:00,486 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 3400 transitions. [2021-03-10 22:09:00,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:09:00,487 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:00,487 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:00,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7095,654 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:00,688 INFO L428 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:00,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:00,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1506328576, now seen corresponding path program 623 times [2021-03-10 22:09:00,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:00,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478773321] [2021-03-10 22:09:00,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:00,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:00,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478773321] [2021-03-10 22:09:00,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777897673] [2021-03-10 22:09:00,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:00,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:09:00,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:00,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 22:09:00,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:01,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:01,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:01,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:09:01,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:01,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:01,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:01,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-03-10 22:09:01,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:01,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:09:01,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:01,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:01,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:01,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-03-10 22:09:01,176 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:01,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:01,180 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:01,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:09:01,184 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:01,260 INFO L628 ElimStorePlain]: treesize reduction 48, result has 56.4 percent of original size [2021-03-10 22:09:01,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:09:01,261 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:195, output treesize:38 [2021-03-10 22:09:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:01,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:01,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:09:01,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949162747] [2021-03-10 22:09:01,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:09:01,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:01,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:09:01,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:09:01,346 INFO L87 Difference]: Start difference. First operand 956 states and 3400 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:01,744 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 22:09:02,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:02,090 INFO L93 Difference]: Finished difference Result 1244 states and 4283 transitions. [2021-03-10 22:09:02,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:09:02,091 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:09:02,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:02,092 INFO L225 Difference]: With dead ends: 1244 [2021-03-10 22:09:02,092 INFO L226 Difference]: Without dead ends: 1150 [2021-03-10 22:09:02,093 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 632.0ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:09:02,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2021-03-10 22:09:02,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 987. [2021-03-10 22:09:02,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 3.5720081135902637) internal successors, (3522), 986 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:02,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 3522 transitions. [2021-03-10 22:09:02,103 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 3522 transitions. Word has length 21 [2021-03-10 22:09:02,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:02,103 INFO L480 AbstractCegarLoop]: Abstraction has 987 states and 3522 transitions. [2021-03-10 22:09:02,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:02,103 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 3522 transitions. [2021-03-10 22:09:02,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:09:02,104 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:02,104 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:02,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7149,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:02,305 INFO L428 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:02,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:02,305 INFO L82 PathProgramCache]: Analyzing trace with hash -970061622, now seen corresponding path program 624 times [2021-03-10 22:09:02,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:02,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116078629] [2021-03-10 22:09:02,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:02,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116078629] [2021-03-10 22:09:02,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254512677] [2021-03-10 22:09:02,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:02,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:09:02,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:02,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-10 22:09:02,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:03,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:03,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:03,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:09:03,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:03,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:03,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:03,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-03-10 22:09:03,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:03,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:03,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:03,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:09:03,041 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:03,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:03,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:03,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:09:03,048 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:03,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:03,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:03,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:09:03,056 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:03,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:03,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:03,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-03-10 22:09:03,063 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:03,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:03,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:03,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-03-10 22:09:03,070 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:03,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:03,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:03,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-03-10 22:09:03,077 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:03,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:03,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:03,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-03-10 22:09:03,085 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:03,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:03,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:03,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:09:03,092 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:03,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:03,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:03,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:09:03,101 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:03,104 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:03,105 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:03,303 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-03-10 22:09:03,303 INFO L628 ElimStorePlain]: treesize reduction 45, result has 80.7 percent of original size [2021-03-10 22:09:03,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:09:03,305 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:640, output treesize:108 [2021-03-10 22:09:03,435 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 22:09:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:03,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:03,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:09:03,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295977821] [2021-03-10 22:09:03,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:09:03,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:03,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:09:03,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:09:03,554 INFO L87 Difference]: Start difference. First operand 987 states and 3522 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:03,845 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-10 22:09:04,179 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 22:09:04,448 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 22:09:04,698 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 22:09:04,952 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-03-10 22:09:05,216 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-03-10 22:09:05,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:05,294 INFO L93 Difference]: Finished difference Result 1209 states and 4146 transitions. [2021-03-10 22:09:05,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:09:05,295 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:09:05,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:05,297 INFO L225 Difference]: With dead ends: 1209 [2021-03-10 22:09:05,297 INFO L226 Difference]: Without dead ends: 1115 [2021-03-10 22:09:05,297 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1793.3ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:09:05,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-03-10 22:09:05,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 978. [2021-03-10 22:09:05,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 3.5649948822927326) internal successors, (3483), 977 states have internal predecessors, (3483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:05,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 3483 transitions. [2021-03-10 22:09:05,308 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 3483 transitions. Word has length 21 [2021-03-10 22:09:05,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:05,308 INFO L480 AbstractCegarLoop]: Abstraction has 978 states and 3483 transitions. [2021-03-10 22:09:05,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:05,308 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 3483 transitions. [2021-03-10 22:09:05,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:09:05,309 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:05,309 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:05,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 656 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7182 [2021-03-10 22:09:05,509 INFO L428 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:05,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:05,510 INFO L82 PathProgramCache]: Analyzing trace with hash -2030839712, now seen corresponding path program 625 times [2021-03-10 22:09:05,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:05,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80978080] [2021-03-10 22:09:05,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:05,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80978080] [2021-03-10 22:09:05,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635571679] [2021-03-10 22:09:05,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:05,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:05,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:05,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:06,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:06,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:06,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:09:06,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:06,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:06,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:06,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:09:06,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:06,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:06,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:06,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-03-10 22:09:06,276 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:06,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:06,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:06,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:06,283 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:06,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:06,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:06,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:09:06,291 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:06,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:06,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:06,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:09:06,297 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:06,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:06,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:06,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:09:06,303 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:06,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:06,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:06,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:09:06,309 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:06,313 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:06,314 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:06,461 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-03-10 22:09:06,462 INFO L628 ElimStorePlain]: treesize reduction 82, result has 64.0 percent of original size [2021-03-10 22:09:06,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:09:06,463 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:457, output treesize:82 [2021-03-10 22:09:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:06,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:06,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-03-10 22:09:06,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305904378] [2021-03-10 22:09:06,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:09:06,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:06,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:09:06,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:06,795 INFO L87 Difference]: Start difference. First operand 978 states and 3483 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:07,135 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 22:09:07,319 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 22:09:07,530 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-10 22:09:07,696 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-03-10 22:09:07,906 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 22:09:08,103 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 22:09:08,295 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-03-10 22:09:08,497 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-03-10 22:09:08,716 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-10 22:09:08,912 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-10 22:09:09,088 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-03-10 22:09:09,269 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-03-10 22:09:09,482 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-10 22:09:09,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:09,493 INFO L93 Difference]: Finished difference Result 1366 states and 4536 transitions. [2021-03-10 22:09:09,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:09:09,494 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:09:09,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:09,495 INFO L225 Difference]: With dead ends: 1366 [2021-03-10 22:09:09,495 INFO L226 Difference]: Without dead ends: 1228 [2021-03-10 22:09:09,496 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 2681.8ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:09:09,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-03-10 22:09:09,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 988. [2021-03-10 22:09:09,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 3.578520770010132) internal successors, (3532), 987 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:09,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 3532 transitions. [2021-03-10 22:09:09,506 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 3532 transitions. Word has length 21 [2021-03-10 22:09:09,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:09,506 INFO L480 AbstractCegarLoop]: Abstraction has 988 states and 3532 transitions. [2021-03-10 22:09:09,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:09,506 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 3532 transitions. [2021-03-10 22:09:09,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:09:09,508 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:09,508 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:09,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7218 [2021-03-10 22:09:09,708 INFO L428 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:09,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:09,708 INFO L82 PathProgramCache]: Analyzing trace with hash -610952064, now seen corresponding path program 626 times [2021-03-10 22:09:09,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:09,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624832546] [2021-03-10 22:09:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:09,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624832546] [2021-03-10 22:09:09,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330470022] [2021-03-10 22:09:09,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:09,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:09,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:09,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:09,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:10,452 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_186, v_prenex_188], 1=[v_prenex_187, nondet_0]} [2021-03-10 22:09:10,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:09:10,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:10,463 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,466 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:10,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,644 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-03-10 22:09:10,644 INFO L628 ElimStorePlain]: treesize reduction 219, result has 40.3 percent of original size [2021-03-10 22:09:10,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:09:10,649 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,778 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-03-10 22:09:10,778 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.4 percent of original size [2021-03-10 22:09:10,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:10,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:10,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:10,784 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:10,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:09:10,790 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,893 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-03-10 22:09:10,894 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-03-10 22:09:10,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:10,898 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:10,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:09:10,951 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:422, output treesize:74 [2021-03-10 22:09:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:11,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:11,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-03-10 22:09:11,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479780604] [2021-03-10 22:09:11,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:09:11,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:11,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:09:11,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:11,175 INFO L87 Difference]: Start difference. First operand 988 states and 3532 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:12,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:12,373 INFO L93 Difference]: Finished difference Result 1237 states and 4208 transitions. [2021-03-10 22:09:12,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:09:12,373 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:09:12,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:12,375 INFO L225 Difference]: With dead ends: 1237 [2021-03-10 22:09:12,375 INFO L226 Difference]: Without dead ends: 1168 [2021-03-10 22:09:12,375 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1190.1ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:09:12,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-03-10 22:09:12,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 978. [2021-03-10 22:09:12,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 3.5649948822927326) internal successors, (3483), 977 states have internal predecessors, (3483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 3483 transitions. [2021-03-10 22:09:12,386 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 3483 transitions. Word has length 21 [2021-03-10 22:09:12,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:12,386 INFO L480 AbstractCegarLoop]: Abstraction has 978 states and 3483 transitions. [2021-03-10 22:09:12,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:12,386 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 3483 transitions. [2021-03-10 22:09:12,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:09:12,387 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:12,388 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:12,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7292,658 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:12,588 INFO L428 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:12,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:12,588 INFO L82 PathProgramCache]: Analyzing trace with hash -555222134, now seen corresponding path program 627 times [2021-03-10 22:09:12,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:12,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789134887] [2021-03-10 22:09:12,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:12,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789134887] [2021-03-10 22:09:12,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787982760] [2021-03-10 22:09:12,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:12,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:09:12,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:12,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:12,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:13,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:09:13,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:13,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:13,392 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:13,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:09:13,400 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:13,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:09:13,407 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:13,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:09:13,415 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:13,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:09:13,422 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:13,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:09:13,430 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:13,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-03-10 22:09:13,437 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:13,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:09:13,444 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:13,598 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-10 22:09:13,598 INFO L628 ElimStorePlain]: treesize reduction 116, result has 55.7 percent of original size [2021-03-10 22:09:13,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:09:13,600 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:457, output treesize:82 [2021-03-10 22:09:13,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:13,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:13,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-03-10 22:09:13,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333553971] [2021-03-10 22:09:13,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:09:13,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:13,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:09:13,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:09:13,936 INFO L87 Difference]: Start difference. First operand 978 states and 3483 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:14,335 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-03-10 22:09:14,686 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 22:09:14,917 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-10 22:09:15,100 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-03-10 22:09:15,314 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 22:09:15,515 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 22:09:15,707 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-03-10 22:09:15,914 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-03-10 22:09:16,140 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-10 22:09:16,338 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-10 22:09:16,517 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-03-10 22:09:16,671 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-03-10 22:09:16,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:16,764 INFO L93 Difference]: Finished difference Result 1386 states and 4616 transitions. [2021-03-10 22:09:16,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:09:16,765 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:09:16,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:16,766 INFO L225 Difference]: With dead ends: 1386 [2021-03-10 22:09:16,766 INFO L226 Difference]: Without dead ends: 1248 [2021-03-10 22:09:16,766 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2822.5ms TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:09:16,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-03-10 22:09:16,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1004. [2021-03-10 22:09:16,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 3.5902293120638085) internal successors, (3601), 1003 states have internal predecessors, (3601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:16,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 3601 transitions. [2021-03-10 22:09:16,778 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 3601 transitions. Word has length 21 [2021-03-10 22:09:16,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:16,778 INFO L480 AbstractCegarLoop]: Abstraction has 1004 states and 3601 transitions. [2021-03-10 22:09:16,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:16,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 3601 transitions. [2021-03-10 22:09:16,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:09:16,779 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:16,779 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:16,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 659 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7355 [2021-03-10 22:09:16,980 INFO L428 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:16,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:16,980 INFO L82 PathProgramCache]: Analyzing trace with hash 864665514, now seen corresponding path program 628 times [2021-03-10 22:09:16,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:16,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768439176] [2021-03-10 22:09:16,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:17,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768439176] [2021-03-10 22:09:17,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326833951] [2021-03-10 22:09:17,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:17,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:09:17,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:17,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:17,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:17,508 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-10 22:09:17,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:17,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:17,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:09:17,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:17,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:17,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:17,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-03-10 22:09:17,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:17,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:17,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:17,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-03-10 22:09:17,924 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:17,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:17,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:17,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-03-10 22:09:17,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:17,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:17,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:17,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:09:17,938 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:17,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:17,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:17,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:09:17,944 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:17,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:17,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:17,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-03-10 22:09:17,951 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:17,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:17,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:09:17,956 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:18,057 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-03-10 22:09:18,057 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.3 percent of original size [2021-03-10 22:09:18,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:09:18,059 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:363, output treesize:57 [2021-03-10 22:09:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:18,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:18,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-03-10 22:09:18,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94601077] [2021-03-10 22:09:18,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:09:18,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:18,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:09:18,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:09:18,293 INFO L87 Difference]: Start difference. First operand 1004 states and 3601 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:18,675 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-10 22:09:18,846 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-03-10 22:09:19,081 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-03-10 22:09:19,741 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-03-10 22:09:19,897 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-10 22:09:19,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:19,947 INFO L93 Difference]: Finished difference Result 1300 states and 4374 transitions. [2021-03-10 22:09:19,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:09:19,948 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:09:19,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:19,949 INFO L225 Difference]: With dead ends: 1300 [2021-03-10 22:09:19,949 INFO L226 Difference]: Without dead ends: 1231 [2021-03-10 22:09:19,950 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1789.7ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:09:19,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2021-03-10 22:09:19,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 992. [2021-03-10 22:09:19,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.5751765893037337) internal successors, (3543), 991 states have internal predecessors, (3543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:19,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3543 transitions. [2021-03-10 22:09:19,961 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3543 transitions. Word has length 21 [2021-03-10 22:09:19,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:19,961 INFO L480 AbstractCegarLoop]: Abstraction has 992 states and 3543 transitions. [2021-03-10 22:09:19,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:19,961 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3543 transitions. [2021-03-10 22:09:19,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:09:19,962 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:19,962 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:20,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 660 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7430 [2021-03-10 22:09:20,163 INFO L428 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:20,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:20,163 INFO L82 PathProgramCache]: Analyzing trace with hash 16043042, now seen corresponding path program 629 times [2021-03-10 22:09:20,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:20,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738990593] [2021-03-10 22:09:20,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:20,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738990593] [2021-03-10 22:09:20,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434789260] [2021-03-10 22:09:20,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:20,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:20,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:20,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:20,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:20,676 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-10 22:09:21,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:21,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:21,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:09:21,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:21,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:21,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:21,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:09:21,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:21,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:21,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:21,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:09:21,043 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:21,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:21,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:21,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:09:21,048 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:21,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:21,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:21,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:21,053 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:21,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:21,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-03-10 22:09:21,057 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:21,152 INFO L628 ElimStorePlain]: treesize reduction 40, result has 71.2 percent of original size [2021-03-10 22:09:21,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:09:21,154 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:267, output treesize:57 [2021-03-10 22:09:21,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:21,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:21,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-03-10 22:09:21,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794403851] [2021-03-10 22:09:21,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:09:21,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:21,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:09:21,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:09:21,377 INFO L87 Difference]: Start difference. First operand 992 states and 3543 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:21,785 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-03-10 22:09:22,138 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 42 [2021-03-10 22:09:22,610 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 22:09:22,760 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 22:09:22,920 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-03-10 22:09:23,078 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-10 22:09:23,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:23,129 INFO L93 Difference]: Finished difference Result 1195 states and 4062 transitions. [2021-03-10 22:09:23,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:09:23,129 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:09:23,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:23,131 INFO L225 Difference]: With dead ends: 1195 [2021-03-10 22:09:23,131 INFO L226 Difference]: Without dead ends: 1126 [2021-03-10 22:09:23,131 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1883.2ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:09:23,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-03-10 22:09:23,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 984. [2021-03-10 22:09:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 3.568667344862665) internal successors, (3508), 983 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:23,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 3508 transitions. [2021-03-10 22:09:23,142 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 3508 transitions. Word has length 21 [2021-03-10 22:09:23,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:23,142 INFO L480 AbstractCegarLoop]: Abstraction has 984 states and 3508 transitions. [2021-03-10 22:09:23,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:23,142 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 3508 transitions. [2021-03-10 22:09:23,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:09:23,143 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:23,143 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:23,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 661 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7476 [2021-03-10 22:09:23,344 INFO L428 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:23,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:23,344 INFO L82 PathProgramCache]: Analyzing trace with hash -195510068, now seen corresponding path program 630 times [2021-03-10 22:09:23,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:23,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597332512] [2021-03-10 22:09:23,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:23,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597332512] [2021-03-10 22:09:23,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805069650] [2021-03-10 22:09:23,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:23,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:09:23,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:23,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:23,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:23,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:23,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:23,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:09:23,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:23,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:23,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:23,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:09:23,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:23,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:23,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:23,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-03-10 22:09:23,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:23,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:23,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:23,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:09:23,877 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:23,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:23,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:23,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:09:23,883 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:23,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:23,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:23,888 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:23,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:23,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:09:23,924 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:213, output treesize:48 [2021-03-10 22:09:24,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:24,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:24,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-03-10 22:09:24,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161822125] [2021-03-10 22:09:24,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:09:24,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:24,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:09:24,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:24,095 INFO L87 Difference]: Start difference. First operand 984 states and 3508 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:25,017 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 22:09:25,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:25,232 INFO L93 Difference]: Finished difference Result 1303 states and 4456 transitions. [2021-03-10 22:09:25,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:09:25,233 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:09:25,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:25,235 INFO L225 Difference]: With dead ends: 1303 [2021-03-10 22:09:25,235 INFO L226 Difference]: Without dead ends: 1187 [2021-03-10 22:09:25,235 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1051.4ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:09:25,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-03-10 22:09:25,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1000. [2021-03-10 22:09:25,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 999 states have (on average 3.5765765765765765) internal successors, (3573), 999 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:25,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 3573 transitions. [2021-03-10 22:09:25,246 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 3573 transitions. Word has length 21 [2021-03-10 22:09:25,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:25,246 INFO L480 AbstractCegarLoop]: Abstraction has 1000 states and 3573 transitions. [2021-03-10 22:09:25,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:25,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 3573 transitions. [2021-03-10 22:09:25,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:09:25,247 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:25,247 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:25,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7516,662 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:25,448 INFO L428 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:25,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:25,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1623067030, now seen corresponding path program 631 times [2021-03-10 22:09:25,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:25,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386290115] [2021-03-10 22:09:25,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:25,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386290115] [2021-03-10 22:09:25,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478154871] [2021-03-10 22:09:25,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:25,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:25,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:25,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:26,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:09:26,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:09:26,024 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:09:26,031 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-03-10 22:09:26,037 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-03-10 22:09:26,044 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:09:26,050 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:09:26,056 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:09:26,063 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:26,068 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,175 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-03-10 22:09:26,176 INFO L628 ElimStorePlain]: treesize reduction 29, result has 77.9 percent of original size [2021-03-10 22:09:26,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:09:26,177 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:367, output treesize:70 [2021-03-10 22:09:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:26,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:26,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-03-10 22:09:26,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426163055] [2021-03-10 22:09:26,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:09:26,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:26,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:09:26,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:26,409 INFO L87 Difference]: Start difference. First operand 1000 states and 3573 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:27,050 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-03-10 22:09:27,415 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-03-10 22:09:27,654 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-03-10 22:09:27,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:27,936 INFO L93 Difference]: Finished difference Result 1413 states and 4763 transitions. [2021-03-10 22:09:27,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:09:27,937 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:09:27,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:27,939 INFO L225 Difference]: With dead ends: 1413 [2021-03-10 22:09:27,939 INFO L226 Difference]: Without dead ends: 1297 [2021-03-10 22:09:27,939 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1442.3ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:09:27,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-03-10 22:09:27,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 991. [2021-03-10 22:09:27,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 3.56969696969697) internal successors, (3534), 990 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:27,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 3534 transitions. [2021-03-10 22:09:27,950 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 3534 transitions. Word has length 21 [2021-03-10 22:09:27,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:27,951 INFO L480 AbstractCegarLoop]: Abstraction has 991 states and 3534 transitions. [2021-03-10 22:09:27,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:27,951 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 3534 transitions. [2021-03-10 22:09:27,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:09:27,952 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:27,952 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:28,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7559,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:28,152 INFO L428 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:28,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:28,152 INFO L82 PathProgramCache]: Analyzing trace with hash 562288940, now seen corresponding path program 632 times [2021-03-10 22:09:28,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:28,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098176810] [2021-03-10 22:09:28,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:28,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:28,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098176810] [2021-03-10 22:09:28,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574516444] [2021-03-10 22:09:28,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:28,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:28,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:28,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:28,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:28,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:28,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:28,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:09:28,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:28,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:28,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:28,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:09:28,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:28,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:28,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:28,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:09:28,863 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:28,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:28,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:28,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-03-10 22:09:28,871 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:28,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:28,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:28,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:09:28,879 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:28,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:28,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:28,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:28,886 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:28,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:28,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:28,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:09:28,894 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:28,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:28,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:28,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:09:28,902 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:28,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:28,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:09:28,908 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:29,081 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-10 22:09:29,082 INFO L628 ElimStorePlain]: treesize reduction 116, result has 55.7 percent of original size [2021-03-10 22:09:29,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:09:29,084 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:457, output treesize:82 [2021-03-10 22:09:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:29,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:29,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-03-10 22:09:29,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260874065] [2021-03-10 22:09:29,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:09:29,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:29,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:09:29,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:29,443 INFO L87 Difference]: Start difference. First operand 991 states and 3534 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:29,778 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-03-10 22:09:29,932 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 22:09:30,197 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-10 22:09:30,321 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-03-10 22:09:30,575 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 22:09:30,828 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-10 22:09:30,993 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-03-10 22:09:31,288 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-10 22:09:31,573 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-03-10 22:09:31,725 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-10 22:09:31,936 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-03-10 22:09:32,143 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-03-10 22:09:32,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:32,177 INFO L93 Difference]: Finished difference Result 1391 states and 4615 transitions. [2021-03-10 22:09:32,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:09:32,178 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:09:32,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:32,179 INFO L225 Difference]: With dead ends: 1391 [2021-03-10 22:09:32,179 INFO L226 Difference]: Without dead ends: 1253 [2021-03-10 22:09:32,179 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2721.4ms TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:09:32,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2021-03-10 22:09:32,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 1000. [2021-03-10 22:09:32,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 999 states have (on average 3.5805805805805804) internal successors, (3577), 999 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:32,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 3577 transitions. [2021-03-10 22:09:32,191 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 3577 transitions. Word has length 21 [2021-03-10 22:09:32,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:32,191 INFO L480 AbstractCegarLoop]: Abstraction has 1000 states and 3577 transitions. [2021-03-10 22:09:32,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:32,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 3577 transitions. [2021-03-10 22:09:32,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:09:32,192 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:32,192 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:32,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7624,664 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:32,393 INFO L428 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:32,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:32,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1982176588, now seen corresponding path program 633 times [2021-03-10 22:09:32,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:32,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164320778] [2021-03-10 22:09:32,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:32,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164320778] [2021-03-10 22:09:32,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828390458] [2021-03-10 22:09:32,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:32,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:09:32,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:32,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:32,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:33,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:09:33,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:33,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-03-10 22:09:33,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:33,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:09:33,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:33,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:33,234 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:33,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-03-10 22:09:33,241 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:33,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:09:33,248 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:33,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:09:33,255 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:33,258 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:33,259 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:33,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:09:33,266 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:33,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:09:33,272 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:33,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:09:33,278 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:33,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:09:33,283 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:33,408 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 22:09:33,409 INFO L628 ElimStorePlain]: treesize reduction 57, result has 69.8 percent of original size [2021-03-10 22:09:33,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:09:33,411 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:518, output treesize:74 [2021-03-10 22:09:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:33,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:33,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-03-10 22:09:33,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780397606] [2021-03-10 22:09:33,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:09:33,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:33,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:09:33,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:33,619 INFO L87 Difference]: Start difference. First operand 1000 states and 3577 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:33,938 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-03-10 22:09:34,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:34,891 INFO L93 Difference]: Finished difference Result 1262 states and 4287 transitions. [2021-03-10 22:09:34,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:09:34,891 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:09:34,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:34,893 INFO L225 Difference]: With dead ends: 1262 [2021-03-10 22:09:34,893 INFO L226 Difference]: Without dead ends: 1193 [2021-03-10 22:09:34,893 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1268.4ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:09:34,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-03-10 22:09:34,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 984. [2021-03-10 22:09:34,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 3.568667344862665) internal successors, (3508), 983 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:34,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 3508 transitions. [2021-03-10 22:09:34,905 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 3508 transitions. Word has length 21 [2021-03-10 22:09:34,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:34,905 INFO L480 AbstractCegarLoop]: Abstraction has 984 states and 3508 transitions. [2021-03-10 22:09:34,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:34,905 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 3508 transitions. [2021-03-10 22:09:34,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:09:34,906 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:34,906 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:35,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7660,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:35,107 INFO L428 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:35,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:35,107 INFO L82 PathProgramCache]: Analyzing trace with hash 2037906518, now seen corresponding path program 634 times [2021-03-10 22:09:35,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:35,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896634533] [2021-03-10 22:09:35,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:35,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896634533] [2021-03-10 22:09:35,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015614992] [2021-03-10 22:09:35,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:35,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:09:35,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:35,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:35,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:35,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:35,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:35,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:09:35,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:35,896 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:35,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:35,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:35,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:35,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:09:35,904 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:35,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:35,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:35,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:09:35,912 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:35,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:35,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:35,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:35,920 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:35,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:35,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:35,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-03-10 22:09:35,928 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:35,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:35,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:35,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:09:35,935 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:35,939 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:35,940 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:35,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:35,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:09:35,947 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:36,113 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-03-10 22:09:36,114 INFO L628 ElimStorePlain]: treesize reduction 46, result has 76.0 percent of original size [2021-03-10 22:09:36,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:09:36,116 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:457, output treesize:82 [2021-03-10 22:09:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:36,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:36,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-03-10 22:09:36,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563199718] [2021-03-10 22:09:36,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:09:36,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:36,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:09:36,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:09:36,487 INFO L87 Difference]: Start difference. First operand 984 states and 3508 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:36,865 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-10 22:09:37,256 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 22:09:37,518 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-10 22:09:37,682 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-03-10 22:09:37,880 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 22:09:38,084 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 22:09:38,315 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-03-10 22:09:38,548 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-03-10 22:09:38,754 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-10 22:09:38,937 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-10 22:09:39,127 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-03-10 22:09:39,317 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-03-10 22:09:39,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:39,424 INFO L93 Difference]: Finished difference Result 1385 states and 4598 transitions. [2021-03-10 22:09:39,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:09:39,425 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:09:39,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:39,427 INFO L225 Difference]: With dead ends: 1385 [2021-03-10 22:09:39,427 INFO L226 Difference]: Without dead ends: 1247 [2021-03-10 22:09:39,427 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2916.9ms TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:09:39,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-03-10 22:09:39,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1002. [2021-03-10 22:09:39,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 3.583416583416583) internal successors, (3587), 1001 states have internal predecessors, (3587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:39,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 3587 transitions. [2021-03-10 22:09:39,439 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 3587 transitions. Word has length 21 [2021-03-10 22:09:39,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:39,439 INFO L480 AbstractCegarLoop]: Abstraction has 1002 states and 3587 transitions. [2021-03-10 22:09:39,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:39,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 3587 transitions. [2021-03-10 22:09:39,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:09:39,440 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:39,440 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:39,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7716 [2021-03-10 22:09:39,640 INFO L428 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:39,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:39,640 INFO L82 PathProgramCache]: Analyzing trace with hash -837173130, now seen corresponding path program 635 times [2021-03-10 22:09:39,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:39,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373157873] [2021-03-10 22:09:39,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:39,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373157873] [2021-03-10 22:09:39,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675814169] [2021-03-10 22:09:39,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:39,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:39,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:39,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:39,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:40,145 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 22:09:40,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:40,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:40,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:09:40,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:40,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:40,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:40,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:09:40,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:40,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:09:40,624 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:40,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:09:40,628 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:40,631 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:40,632 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:40,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:40,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:40,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-03-10 22:09:40,637 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:40,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:40,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:40,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2021-03-10 22:09:40,642 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:40,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:40,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:40,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:09:40,647 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:40,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:40,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2021-03-10 22:09:40,651 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:40,775 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-03-10 22:09:40,776 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-03-10 22:09:40,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:09:40,778 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:376, output treesize:74 [2021-03-10 22:09:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:41,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:41,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-03-10 22:09:41,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557778091] [2021-03-10 22:09:41,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:09:41,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:41,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:09:41,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:09:41,005 INFO L87 Difference]: Start difference. First operand 1002 states and 3587 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:41,374 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-03-10 22:09:42,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:42,558 INFO L93 Difference]: Finished difference Result 1408 states and 4635 transitions. [2021-03-10 22:09:42,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:09:42,559 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:09:42,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:42,560 INFO L225 Difference]: With dead ends: 1408 [2021-03-10 22:09:42,561 INFO L226 Difference]: Without dead ends: 1324 [2021-03-10 22:09:42,561 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1624.7ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:09:42,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-03-10 22:09:42,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1005. [2021-03-10 22:09:42,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 3.5677290836653386) internal successors, (3582), 1004 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:42,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 3582 transitions. [2021-03-10 22:09:42,572 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 3582 transitions. Word has length 21 [2021-03-10 22:09:42,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:42,572 INFO L480 AbstractCegarLoop]: Abstraction has 1005 states and 3582 transitions. [2021-03-10 22:09:42,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:42,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 3582 transitions. [2021-03-10 22:09:42,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:09:42,573 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:42,573 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:42,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 667 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7751 [2021-03-10 22:09:42,773 INFO L428 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:42,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:42,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1132392534, now seen corresponding path program 636 times [2021-03-10 22:09:42,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:42,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49414911] [2021-03-10 22:09:42,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:42,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49414911] [2021-03-10 22:09:42,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208402879] [2021-03-10 22:09:42,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:43,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:09:43,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:43,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:43,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:43,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:09:43,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:43,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:43,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:43,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:09:43,349 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:43,352 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:43,353 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:43,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:09:43,356 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:43,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:43,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:09:43,380 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:137, output treesize:57 [2021-03-10 22:09:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:43,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:43,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:09:43,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305584401] [2021-03-10 22:09:43,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:09:43,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:43,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:09:43,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:09:43,631 INFO L87 Difference]: Start difference. First operand 1005 states and 3582 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:44,040 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-10 22:09:45,218 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-03-10 22:09:45,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:45,310 INFO L93 Difference]: Finished difference Result 1361 states and 4654 transitions. [2021-03-10 22:09:45,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:09:45,310 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:09:45,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:45,312 INFO L225 Difference]: With dead ends: 1361 [2021-03-10 22:09:45,312 INFO L226 Difference]: Without dead ends: 1285 [2021-03-10 22:09:45,312 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1486.8ms TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:09:45,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-03-10 22:09:45,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 986. [2021-03-10 22:09:45,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 3.569543147208122) internal successors, (3516), 985 states have internal predecessors, (3516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:45,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 3516 transitions. [2021-03-10 22:09:45,325 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 3516 transitions. Word has length 21 [2021-03-10 22:09:45,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:45,325 INFO L480 AbstractCegarLoop]: Abstraction has 986 states and 3516 transitions. [2021-03-10 22:09:45,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:45,325 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 3516 transitions. [2021-03-10 22:09:45,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:09:45,326 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:45,326 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:45,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7813,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:45,526 INFO L428 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:45,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:45,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1480674806, now seen corresponding path program 637 times [2021-03-10 22:09:45,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:45,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664496474] [2021-03-10 22:09:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:45,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664496474] [2021-03-10 22:09:45,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527953046] [2021-03-10 22:09:45,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:45,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:45,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:46,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:46,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:46,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:09:46,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:46,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:46,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:46,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:09:46,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:46,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:46,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-10 22:09:46,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:46,452 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-03-10 22:09:46,452 INFO L628 ElimStorePlain]: treesize reduction 194, result has 41.2 percent of original size [2021-03-10 22:09:46,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:09:46,458 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:46,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:46,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:46,525 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:46,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:46,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:09:46,531 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:46,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:46,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:09:46,601 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:385, output treesize:83 [2021-03-10 22:09:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:46,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:46,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-03-10 22:09:46,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774171507] [2021-03-10 22:09:46,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:09:46,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:46,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:09:46,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:09:46,954 INFO L87 Difference]: Start difference. First operand 986 states and 3516 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:47,369 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-03-10 22:09:47,659 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-03-10 22:09:47,915 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-03-10 22:09:48,198 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-03-10 22:09:48,524 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-03-10 22:09:48,742 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-03-10 22:09:48,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:48,869 INFO L93 Difference]: Finished difference Result 1500 states and 4985 transitions. [2021-03-10 22:09:48,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:09:48,870 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:09:48,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:48,872 INFO L225 Difference]: With dead ends: 1500 [2021-03-10 22:09:48,872 INFO L226 Difference]: Without dead ends: 1431 [2021-03-10 22:09:48,872 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1916.2ms TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:09:48,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2021-03-10 22:09:48,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 1013. [2021-03-10 22:09:48,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 3.5879446640316206) internal successors, (3631), 1012 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:48,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3631 transitions. [2021-03-10 22:09:48,884 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3631 transitions. Word has length 21 [2021-03-10 22:09:48,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:48,884 INFO L480 AbstractCegarLoop]: Abstraction has 1013 states and 3631 transitions. [2021-03-10 22:09:48,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3631 transitions. [2021-03-10 22:09:48,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:09:48,885 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:48,885 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:49,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7827 [2021-03-10 22:09:49,086 INFO L428 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:49,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:49,086 INFO L82 PathProgramCache]: Analyzing trace with hash -60787158, now seen corresponding path program 638 times [2021-03-10 22:09:49,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:49,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802659829] [2021-03-10 22:09:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:49,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802659829] [2021-03-10 22:09:49,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656426607] [2021-03-10 22:09:49,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:49,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:49,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:49,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:49,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:50,015 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_210, v_prenex_211], 1=[v_prenex_212, nondet_0]} [2021-03-10 22:09:50,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:50,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:09:50,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,031 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:50,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,201 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-03-10 22:09:50,201 INFO L628 ElimStorePlain]: treesize reduction 219, result has 40.3 percent of original size [2021-03-10 22:09:50,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:09:50,205 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,322 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-03-10 22:09:50,322 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.4 percent of original size [2021-03-10 22:09:50,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:50,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:50,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:09:50,329 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:50,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:50,334 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,435 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-10 22:09:50,436 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-03-10 22:09:50,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:50,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:50,440 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:50,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:09:50,495 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:422, output treesize:74 [2021-03-10 22:09:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:50,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:50,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-03-10 22:09:50,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005044435] [2021-03-10 22:09:50,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:09:50,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:50,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:09:50,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:09:50,756 INFO L87 Difference]: Start difference. First operand 1013 states and 3631 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:51,137 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-03-10 22:09:51,543 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-03-10 22:09:51,738 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-03-10 22:09:52,082 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-03-10 22:09:52,332 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-03-10 22:09:52,508 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-03-10 22:09:52,869 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-03-10 22:09:53,049 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-03-10 22:09:53,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:53,091 INFO L93 Difference]: Finished difference Result 1606 states and 5211 transitions. [2021-03-10 22:09:53,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:09:53,092 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:09:53,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:53,094 INFO L225 Difference]: With dead ends: 1606 [2021-03-10 22:09:53,094 INFO L226 Difference]: Without dead ends: 1522 [2021-03-10 22:09:53,094 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2241.7ms TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:09:53,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2021-03-10 22:09:53,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1020. [2021-03-10 22:09:53,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 3.568204121687929) internal successors, (3636), 1019 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:53,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 3636 transitions. [2021-03-10 22:09:53,107 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 3636 transitions. Word has length 21 [2021-03-10 22:09:53,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:53,108 INFO L480 AbstractCegarLoop]: Abstraction has 1020 states and 3636 transitions. [2021-03-10 22:09:53,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:53,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 3636 transitions. [2021-03-10 22:09:53,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:09:53,109 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:53,109 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:53,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7868,670 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:53,309 INFO L428 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:53,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:53,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1908778506, now seen corresponding path program 639 times [2021-03-10 22:09:53,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:53,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188350795] [2021-03-10 22:09:53,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:53,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:53,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188350795] [2021-03-10 22:09:53,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265268698] [2021-03-10 22:09:53,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:53,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:09:53,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:53,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:53,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:53,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:09:53,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:53,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:53,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:53,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:09:53,860 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:53,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:53,863 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:53,865 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:53,866 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:53,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:09:53,869 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:53,924 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-03-10 22:09:53,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:09:53,926 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:169, output treesize:58 [2021-03-10 22:09:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:54,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:54,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:09:54,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996581513] [2021-03-10 22:09:54,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:09:54,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:54,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:09:54,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:09:54,206 INFO L87 Difference]: Start difference. First operand 1020 states and 3636 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:55,059 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-03-10 22:09:55,694 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-03-10 22:09:55,855 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 22:09:56,093 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-03-10 22:09:56,440 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-03-10 22:09:56,860 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-03-10 22:09:57,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:57,026 INFO L93 Difference]: Finished difference Result 1803 states and 5849 transitions. [2021-03-10 22:09:57,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:09:57,026 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:09:57,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:57,029 INFO L225 Difference]: With dead ends: 1803 [2021-03-10 22:09:57,029 INFO L226 Difference]: Without dead ends: 1712 [2021-03-10 22:09:57,029 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 2354.8ms TimeCoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 22:09:57,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-03-10 22:09:57,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1011. [2021-03-10 22:09:57,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 3.5643564356435644) internal successors, (3600), 1010 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:57,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 3600 transitions. [2021-03-10 22:09:57,044 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 3600 transitions. Word has length 21 [2021-03-10 22:09:57,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:57,044 INFO L480 AbstractCegarLoop]: Abstraction has 1011 states and 3600 transitions. [2021-03-10 22:09:57,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:57,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 3600 transitions. [2021-03-10 22:09:57,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:09:57,045 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:57,046 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:57,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7952,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:57,246 INFO L428 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:57,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:57,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1427259128, now seen corresponding path program 640 times [2021-03-10 22:09:57,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:57,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154756647] [2021-03-10 22:09:57,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:57,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154756647] [2021-03-10 22:09:57,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364916980] [2021-03-10 22:09:57,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:57,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:09:57,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:57,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:57,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:57,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:09:57,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:57,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:09:57,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:57,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:09:57,734 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:57,737 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:57,738 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:57,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:09:57,743 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:57,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:57,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:09:57,773 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:137, output treesize:57 [2021-03-10 22:09:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:58,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:58,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:09:58,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070996583] [2021-03-10 22:09:58,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:09:58,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:58,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:09:58,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:09:58,062 INFO L87 Difference]: Start difference. First operand 1011 states and 3600 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:58,994 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2021-03-10 22:09:59,798 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-03-10 22:09:59,997 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-03-10 22:10:00,276 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-03-10 22:10:00,476 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-03-10 22:10:00,709 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2021-03-10 22:10:00,974 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-03-10 22:10:01,389 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-03-10 22:10:02,011 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2021-03-10 22:10:02,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:02,221 INFO L93 Difference]: Finished difference Result 1776 states and 5997 transitions. [2021-03-10 22:10:02,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 22:10:02,222 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:10:02,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:02,225 INFO L225 Difference]: With dead ends: 1776 [2021-03-10 22:10:02,225 INFO L226 Difference]: Without dead ends: 1707 [2021-03-10 22:10:02,225 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 3590.2ms TimeCoverageRelationStatistics Valid=394, Invalid=1958, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 22:10:02,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-03-10 22:10:02,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1013. [2021-03-10 22:10:02,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 3.5543478260869565) internal successors, (3597), 1012 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:02,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3597 transitions. [2021-03-10 22:10:02,240 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3597 transitions. Word has length 21 [2021-03-10 22:10:02,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:02,240 INFO L480 AbstractCegarLoop]: Abstraction has 1013 states and 3597 transitions. [2021-03-10 22:10:02,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:02,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3597 transitions. [2021-03-10 22:10:02,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:10:02,242 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:02,242 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:02,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7966,672 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:02,442 INFO L428 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:02,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:02,443 INFO L82 PathProgramCache]: Analyzing trace with hash 2074308097, now seen corresponding path program 30 times [2021-03-10 22:10:02,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:02,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577024190] [2021-03-10 22:10:02,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:02,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:02,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577024190] [2021-03-10 22:10:02,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104120438] [2021-03-10 22:10:02,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:02,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:10:02,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:02,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:10:02,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:02,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:02,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:02,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:02,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:02,841 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:02,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:02,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:02,845 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:02,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:02,849 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:02,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:02,852 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:02,854 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:02,855 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:02,902 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-03-10 22:10:02,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:10:02,903 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-03-10 22:10:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:10:03,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:03,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-03-10 22:10:03,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300790924] [2021-03-10 22:10:03,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:03,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:03,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:03,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:03,005 INFO L87 Difference]: Start difference. First operand 1013 states and 3597 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:04,011 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 22:10:04,433 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 22:10:04,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:04,464 INFO L93 Difference]: Finished difference Result 1617 states and 5334 transitions. [2021-03-10 22:10:04,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:10:04,465 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:10:04,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:04,467 INFO L225 Difference]: With dead ends: 1617 [2021-03-10 22:10:04,467 INFO L226 Difference]: Without dead ends: 1440 [2021-03-10 22:10:04,467 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1277.7ms TimeCoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:10:04,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-03-10 22:10:04,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1023. [2021-03-10 22:10:04,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 3.5665362035225048) internal successors, (3645), 1022 states have internal predecessors, (3645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:04,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 3645 transitions. [2021-03-10 22:10:04,480 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 3645 transitions. Word has length 21 [2021-03-10 22:10:04,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:04,480 INFO L480 AbstractCegarLoop]: Abstraction has 1023 states and 3645 transitions. [2021-03-10 22:10:04,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:04,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 3645 transitions. [2021-03-10 22:10:04,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:10:04,481 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:04,481 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:04,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7978,673 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:04,682 INFO L428 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:04,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:04,682 INFO L82 PathProgramCache]: Analyzing trace with hash -342964863, now seen corresponding path program 31 times [2021-03-10 22:10:04,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:04,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121398480] [2021-03-10 22:10:04,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:04,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121398480] [2021-03-10 22:10:04,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138381027] [2021-03-10 22:10:04,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:04,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:10:04,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:05,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:05,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:05,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:05,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:05,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:05,126 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:05,150 INFO L628 ElimStorePlain]: treesize reduction 13, result has 51.9 percent of original size [2021-03-10 22:10:05,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:10:05,151 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:51, output treesize:14 [2021-03-10 22:10:05,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:10:05,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:05,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-03-10 22:10:05,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57312581] [2021-03-10 22:10:05,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:10:05,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:05,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:10:05,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:10:05,215 INFO L87 Difference]: Start difference. First operand 1023 states and 3645 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:06,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:06,032 INFO L93 Difference]: Finished difference Result 1313 states and 4445 transitions. [2021-03-10 22:10:06,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:10:06,033 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:10:06,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:06,035 INFO L225 Difference]: With dead ends: 1313 [2021-03-10 22:10:06,035 INFO L226 Difference]: Without dead ends: 1286 [2021-03-10 22:10:06,035 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 733.1ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:10:06,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-03-10 22:10:06,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1026. [2021-03-10 22:10:06,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1025 states have (on average 3.5639024390243903) internal successors, (3653), 1025 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:06,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 3653 transitions. [2021-03-10 22:10:06,046 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 3653 transitions. Word has length 21 [2021-03-10 22:10:06,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:06,046 INFO L480 AbstractCegarLoop]: Abstraction has 1026 states and 3653 transitions. [2021-03-10 22:10:06,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:06,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 3653 transitions. [2021-03-10 22:10:06,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:10:06,048 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:06,048 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:06,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7986,674 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:06,248 INFO L428 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:06,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:06,248 INFO L82 PathProgramCache]: Analyzing trace with hash -955841261, now seen corresponding path program 32 times [2021-03-10 22:10:06,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:06,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325354622] [2021-03-10 22:10:06,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:06,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325354622] [2021-03-10 22:10:06,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190303888] [2021-03-10 22:10:06,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:06,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:06,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:06,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:10:06,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:06,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:06,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:06,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:06,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:06,670 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:06,671 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:06,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:06,675 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:06,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:06,680 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:06,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:06,685 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:06,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:06,689 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:06,692 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:06,693 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:06,738 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-03-10 22:10:06,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:06,739 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:153, output treesize:28 [2021-03-10 22:10:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:10:06,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:06,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-03-10 22:10:06,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697370538] [2021-03-10 22:10:06,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:10:06,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:06,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:10:06,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:10:06,838 INFO L87 Difference]: Start difference. First operand 1026 states and 3653 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:07,226 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-03-10 22:10:07,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:07,665 INFO L93 Difference]: Finished difference Result 1362 states and 4569 transitions. [2021-03-10 22:10:07,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:10:07,666 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:10:07,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:07,668 INFO L225 Difference]: With dead ends: 1362 [2021-03-10 22:10:07,668 INFO L226 Difference]: Without dead ends: 1302 [2021-03-10 22:10:07,668 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 763.6ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:10:07,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-03-10 22:10:07,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1023. [2021-03-10 22:10:07,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 3.5665362035225048) internal successors, (3645), 1022 states have internal predecessors, (3645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:07,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 3645 transitions. [2021-03-10 22:10:07,688 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 3645 transitions. Word has length 21 [2021-03-10 22:10:07,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:07,688 INFO L480 AbstractCegarLoop]: Abstraction has 1023 states and 3645 transitions. [2021-03-10 22:10:07,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:07,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 3645 transitions. [2021-03-10 22:10:07,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:10:07,690 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:07,690 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:07,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7997,675 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:07,890 INFO L428 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:07,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:07,890 INFO L82 PathProgramCache]: Analyzing trace with hash 2010428615, now seen corresponding path program 33 times [2021-03-10 22:10:07,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:07,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866117498] [2021-03-10 22:10:07,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:08,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866117498] [2021-03-10 22:10:08,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035353508] [2021-03-10 22:10:08,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:08,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:10:08,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:08,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:10:08,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:08,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:08,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:08,266 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:08,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:08,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:08,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:08,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:08,278 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:08,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:08,281 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:08,332 INFO L628 ElimStorePlain]: treesize reduction 15, result has 73.2 percent of original size [2021-03-10 22:10:08,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:10:08,333 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:110, output treesize:41 [2021-03-10 22:10:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:10:08,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:08,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2021-03-10 22:10:08,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813582882] [2021-03-10 22:10:08,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:10:08,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:08,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:10:08,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:10:08,441 INFO L87 Difference]: Start difference. First operand 1023 states and 3645 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:09,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:09,605 INFO L93 Difference]: Finished difference Result 1382 states and 4642 transitions. [2021-03-10 22:10:09,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:10:09,606 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:10:09,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:09,608 INFO L225 Difference]: With dead ends: 1382 [2021-03-10 22:10:09,608 INFO L226 Difference]: Without dead ends: 1310 [2021-03-10 22:10:09,608 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1029.4ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:10:09,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-03-10 22:10:09,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1014. [2021-03-10 22:10:09,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 3.574531095755183) internal successors, (3621), 1013 states have internal predecessors, (3621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:09,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 3621 transitions. [2021-03-10 22:10:09,620 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 3621 transitions. Word has length 21 [2021-03-10 22:10:09,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:09,620 INFO L480 AbstractCegarLoop]: Abstraction has 1014 states and 3621 transitions. [2021-03-10 22:10:09,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:09,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 3621 transitions. [2021-03-10 22:10:09,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:10:09,621 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:09,621 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:09,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8008,676 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:09,822 INFO L428 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:09,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:09,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1526667057, now seen corresponding path program 34 times [2021-03-10 22:10:09,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:09,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046412642] [2021-03-10 22:10:09,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:09,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046412642] [2021-03-10 22:10:09,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660103084] [2021-03-10 22:10:09,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:10,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:10:10,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:10,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:10:10,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:10,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:10,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:10,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:10:10,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:10,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:10:10,250 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:10,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:10,255 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:10,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:10:10,261 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:10,264 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:10,265 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:10,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:10,270 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:10,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:10,276 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:10,408 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-03-10 22:10:10,409 INFO L628 ElimStorePlain]: treesize reduction 50, result has 66.0 percent of original size [2021-03-10 22:10:10,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:10:10,410 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:247, output treesize:97 [2021-03-10 22:10:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:10:10,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:10,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2021-03-10 22:10:10,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108175640] [2021-03-10 22:10:10,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:10:10,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:10,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:10:10,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:10:10,592 INFO L87 Difference]: Start difference. First operand 1014 states and 3621 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:11,105 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-10 22:10:11,318 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-03-10 22:10:11,578 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-03-10 22:10:11,737 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-03-10 22:10:11,960 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-03-10 22:10:12,251 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-03-10 22:10:12,495 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-03-10 22:10:12,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:12,533 INFO L93 Difference]: Finished difference Result 1589 states and 5252 transitions. [2021-03-10 22:10:12,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:10:12,534 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:10:12,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:12,536 INFO L225 Difference]: With dead ends: 1589 [2021-03-10 22:10:12,536 INFO L226 Difference]: Without dead ends: 1457 [2021-03-10 22:10:12,536 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1689.5ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:10:12,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2021-03-10 22:10:12,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1010. [2021-03-10 22:10:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 3.5688800792864224) internal successors, (3601), 1009 states have internal predecessors, (3601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:12,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 3601 transitions. [2021-03-10 22:10:12,548 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 3601 transitions. Word has length 21 [2021-03-10 22:10:12,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:12,548 INFO L480 AbstractCegarLoop]: Abstraction has 1010 states and 3601 transitions. [2021-03-10 22:10:12,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:12,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 3601 transitions. [2021-03-10 22:10:12,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:10:12,550 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:12,550 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:12,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 677 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8023 [2021-03-10 22:10:12,750 INFO L428 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:12,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:12,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1126678671, now seen corresponding path program 35 times [2021-03-10 22:10:12,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:12,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810713460] [2021-03-10 22:10:12,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:10:12,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810713460] [2021-03-10 22:10:12,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004697937] [2021-03-10 22:10:12,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:12,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:10:12,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:12,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:10:12,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:12,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:12,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:12,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:12,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:12,986 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:12,987 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:12,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:12,991 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:12,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:12,995 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:13,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:13,006 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:13,008 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:13,009 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:13,056 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-03-10 22:10:13,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:10:13,057 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-03-10 22:10:13,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:10:13,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:13,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:10:13,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448593438] [2021-03-10 22:10:13,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:10:13,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:13,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:10:13,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:10:13,174 INFO L87 Difference]: Start difference. First operand 1010 states and 3601 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:13,380 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 22:10:13,536 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-10 22:10:13,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:13,663 INFO L93 Difference]: Finished difference Result 1520 states and 5050 transitions. [2021-03-10 22:10:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:10:13,664 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:10:13,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:13,666 INFO L225 Difference]: With dead ends: 1520 [2021-03-10 22:10:13,666 INFO L226 Difference]: Without dead ends: 1397 [2021-03-10 22:10:13,666 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 405.0ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:10:13,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-03-10 22:10:13,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 967. [2021-03-10 22:10:13,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 3.531055900621118) internal successors, (3411), 966 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:13,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 3411 transitions. [2021-03-10 22:10:13,678 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 3411 transitions. Word has length 21 [2021-03-10 22:10:13,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:13,678 INFO L480 AbstractCegarLoop]: Abstraction has 967 states and 3411 transitions. [2021-03-10 22:10:13,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:13,678 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 3411 transitions. [2021-03-10 22:10:13,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:10:13,679 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:13,679 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:13,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8042 [2021-03-10 22:10:13,880 INFO L428 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:13,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:13,880 INFO L82 PathProgramCache]: Analyzing trace with hash 933259975, now seen corresponding path program 36 times [2021-03-10 22:10:13,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:13,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088914436] [2021-03-10 22:10:13,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:13,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:10:13,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088914436] [2021-03-10 22:10:13,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674199285] [2021-03-10 22:10:13,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:14,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:10:14,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:14,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:10:14,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:14,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:14,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:14,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:10:14,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:14,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:14,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:14,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:10:14,262 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:14,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:10:14,267 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:14,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:14,272 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:14,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:10:14,276 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:14,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:14,281 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:14,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:14,286 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:14,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:10:14,290 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:14,293 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:14,294 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:14,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:10:14,299 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:14,302 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:14,303 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:14,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:14,307 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:14,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:14,312 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:14,316 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:14,317 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:14,522 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-10 22:10:14,523 INFO L628 ElimStorePlain]: treesize reduction 127, result has 52.3 percent of original size [2021-03-10 22:10:14,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-03-10 22:10:14,525 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:535, output treesize:139 [2021-03-10 22:10:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:14,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:14,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-03-10 22:10:14,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872220192] [2021-03-10 22:10:14,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:14,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:14,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:14,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:14,980 INFO L87 Difference]: Start difference. First operand 967 states and 3411 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:15,874 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-03-10 22:10:16,328 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-03-10 22:10:17,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:17,011 INFO L93 Difference]: Finished difference Result 1652 states and 5340 transitions. [2021-03-10 22:10:17,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:10:17,012 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:10:17,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:17,014 INFO L225 Difference]: With dead ends: 1652 [2021-03-10 22:10:17,014 INFO L226 Difference]: Without dead ends: 1550 [2021-03-10 22:10:17,015 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1893.0ms TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:10:17,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2021-03-10 22:10:17,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1005. [2021-03-10 22:10:17,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 3.5637450199203187) internal successors, (3578), 1004 states have internal predecessors, (3578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:17,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 3578 transitions. [2021-03-10 22:10:17,028 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 3578 transitions. Word has length 21 [2021-03-10 22:10:17,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:17,028 INFO L480 AbstractCegarLoop]: Abstraction has 1005 states and 3578 transitions. [2021-03-10 22:10:17,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:17,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 3578 transitions. [2021-03-10 22:10:17,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:10:17,029 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:17,029 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:17,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 679 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8055 [2021-03-10 22:10:17,230 INFO L428 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:17,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:17,230 INFO L82 PathProgramCache]: Analyzing trace with hash -560647747, now seen corresponding path program 37 times [2021-03-10 22:10:17,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:17,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606212084] [2021-03-10 22:10:17,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:10:17,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606212084] [2021-03-10 22:10:17,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874980392] [2021-03-10 22:10:17,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:17,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:10:17,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:17,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:17,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:17,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:17,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:17,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:17,557 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:17,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:17,561 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:17,564 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:17,565 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:17,623 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-03-10 22:10:17,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:10:17,624 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-03-10 22:10:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:10:17,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:17,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:10:17,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012007538] [2021-03-10 22:10:17,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:10:17,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:17,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:10:17,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:10:17,730 INFO L87 Difference]: Start difference. First operand 1005 states and 3578 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:18,224 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 22:10:18,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:18,487 INFO L93 Difference]: Finished difference Result 1604 states and 5184 transitions. [2021-03-10 22:10:18,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:10:18,488 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:10:18,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:18,490 INFO L225 Difference]: With dead ends: 1604 [2021-03-10 22:10:18,490 INFO L226 Difference]: Without dead ends: 1477 [2021-03-10 22:10:18,490 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 677.6ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:10:18,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2021-03-10 22:10:18,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 982. [2021-03-10 22:10:18,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 3.543323139653415) internal successors, (3476), 981 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:18,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 3476 transitions. [2021-03-10 22:10:18,503 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 3476 transitions. Word has length 21 [2021-03-10 22:10:18,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:18,503 INFO L480 AbstractCegarLoop]: Abstraction has 982 states and 3476 transitions. [2021-03-10 22:10:18,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:18,503 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 3476 transitions. [2021-03-10 22:10:18,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:10:18,504 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:18,504 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:18,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 680 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8073 [2021-03-10 22:10:18,704 INFO L428 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:18,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:18,704 INFO L82 PathProgramCache]: Analyzing trace with hash -22792169, now seen corresponding path program 38 times [2021-03-10 22:10:18,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:18,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757248083] [2021-03-10 22:10:18,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:10:18,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757248083] [2021-03-10 22:10:18,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742434225] [2021-03-10 22:10:18,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:18,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:18,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:18,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:10:18,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:10:19,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:19,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:10:19,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932465436] [2021-03-10 22:10:19,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:10:19,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:19,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:10:19,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:10:19,043 INFO L87 Difference]: Start difference. First operand 982 states and 3476 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:19,472 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 22:10:19,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:19,631 INFO L93 Difference]: Finished difference Result 1413 states and 4621 transitions. [2021-03-10 22:10:19,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:10:19,632 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:10:19,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:19,634 INFO L225 Difference]: With dead ends: 1413 [2021-03-10 22:10:19,634 INFO L226 Difference]: Without dead ends: 1252 [2021-03-10 22:10:19,634 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 482.4ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:10:19,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-03-10 22:10:19,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 956. [2021-03-10 22:10:19,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 3.5214659685863876) internal successors, (3363), 955 states have internal predecessors, (3363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:19,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 3363 transitions. [2021-03-10 22:10:19,645 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 3363 transitions. Word has length 21 [2021-03-10 22:10:19,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:19,645 INFO L480 AbstractCegarLoop]: Abstraction has 956 states and 3363 transitions. [2021-03-10 22:10:19,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:19,645 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 3363 transitions. [2021-03-10 22:10:19,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:10:19,646 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:19,646 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:19,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8083,681 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:19,846 INFO L428 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:19,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:19,846 INFO L82 PathProgramCache]: Analyzing trace with hash -989063045, now seen corresponding path program 39 times [2021-03-10 22:10:19,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:19,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102431691] [2021-03-10 22:10:19,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:19,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102431691] [2021-03-10 22:10:19,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81201819] [2021-03-10 22:10:19,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:20,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:10:20,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:20,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:10:20,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:20,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:20,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:20,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:10:20,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:20,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:20,249 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:20,252 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:20,253 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:20,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:20,258 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:20,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:20,263 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:20,266 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:20,268 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:20,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:10:20,272 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:20,391 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 22:10:20,391 INFO L628 ElimStorePlain]: treesize reduction 25, result has 77.1 percent of original size [2021-03-10 22:10:20,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:10:20,393 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:224, output treesize:84 [2021-03-10 22:10:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:10:20,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:20,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 22:10:20,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403331483] [2021-03-10 22:10:20,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:20,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:20,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:20,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:20,663 INFO L87 Difference]: Start difference. First operand 956 states and 3363 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:21,163 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-10 22:10:21,472 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-03-10 22:10:21,814 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-03-10 22:10:22,095 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-03-10 22:10:22,423 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-03-10 22:10:22,633 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-03-10 22:10:22,877 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-03-10 22:10:22,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:23,000 INFO L93 Difference]: Finished difference Result 2033 states and 6645 transitions. [2021-03-10 22:10:23,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:10:23,000 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:10:23,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:23,003 INFO L225 Difference]: With dead ends: 2033 [2021-03-10 22:10:23,003 INFO L226 Difference]: Without dead ends: 1928 [2021-03-10 22:10:23,003 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2207.7ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:10:23,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-03-10 22:10:23,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 967. [2021-03-10 22:10:23,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 3.518633540372671) internal successors, (3399), 966 states have internal predecessors, (3399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:23,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 3399 transitions. [2021-03-10 22:10:23,016 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 3399 transitions. Word has length 21 [2021-03-10 22:10:23,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:23,016 INFO L480 AbstractCegarLoop]: Abstraction has 967 states and 3399 transitions. [2021-03-10 22:10:23,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:23,016 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 3399 transitions. [2021-03-10 22:10:23,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:10:23,017 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:23,017 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:23,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8089,682 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:23,218 INFO L428 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:23,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:23,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1264433973, now seen corresponding path program 40 times [2021-03-10 22:10:23,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:23,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491854870] [2021-03-10 22:10:23,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:23,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491854870] [2021-03-10 22:10:23,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255281479] [2021-03-10 22:10:23,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:23,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:10:23,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:23,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:10:23,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:23,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:23,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:23,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:10:23,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:23,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:23,686 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:23,689 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:23,690 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:23,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:23,695 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:23,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:23,700 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:23,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:10:23,705 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:23,822 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 22:10:23,823 INFO L628 ElimStorePlain]: treesize reduction 25, result has 77.1 percent of original size [2021-03-10 22:10:23,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:10:23,824 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:202, output treesize:84 [2021-03-10 22:10:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:10:24,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:24,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 22:10:24,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204089874] [2021-03-10 22:10:24,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:24,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:24,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:24,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:24,108 INFO L87 Difference]: Start difference. First operand 967 states and 3399 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:24,693 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-03-10 22:10:24,853 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 22:10:25,227 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-03-10 22:10:25,600 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-03-10 22:10:25,825 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-03-10 22:10:26,066 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-03-10 22:10:26,357 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-03-10 22:10:26,583 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2021-03-10 22:10:26,809 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-03-10 22:10:26,991 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2021-03-10 22:10:27,232 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-03-10 22:10:27,447 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2021-03-10 22:10:27,660 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-03-10 22:10:27,974 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-03-10 22:10:27,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:27,990 INFO L93 Difference]: Finished difference Result 1695 states and 5453 transitions. [2021-03-10 22:10:27,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:10:27,991 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:10:27,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:27,993 INFO L225 Difference]: With dead ends: 1695 [2021-03-10 22:10:27,993 INFO L226 Difference]: Without dead ends: 1626 [2021-03-10 22:10:27,993 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 3773.1ms TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:10:27,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-03-10 22:10:28,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 981. [2021-03-10 22:10:28,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 3.5326530612244897) internal successors, (3462), 980 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:28,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 3462 transitions. [2021-03-10 22:10:28,007 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 3462 transitions. Word has length 21 [2021-03-10 22:10:28,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:28,007 INFO L480 AbstractCegarLoop]: Abstraction has 981 states and 3462 transitions. [2021-03-10 22:10:28,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:28,007 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 3462 transitions. [2021-03-10 22:10:28,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:10:28,008 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:28,008 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:28,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 683 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8105 [2021-03-10 22:10:28,209 INFO L428 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:28,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:28,209 INFO L82 PathProgramCache]: Analyzing trace with hash 308381829, now seen corresponding path program 41 times [2021-03-10 22:10:28,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:28,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582741132] [2021-03-10 22:10:28,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:28,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:28,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582741132] [2021-03-10 22:10:28,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501832764] [2021-03-10 22:10:28,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:28,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:10:28,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:28,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:10:28,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:28,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:28,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:28,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:10:28,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:28,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:28,576 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:28,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:28,580 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:28,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:10:28,583 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:28,692 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-03-10 22:10:28,692 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.7 percent of original size [2021-03-10 22:10:28,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:10:28,693 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:136, output treesize:84 [2021-03-10 22:10:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:29,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:29,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-03-10 22:10:29,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094417647] [2021-03-10 22:10:29,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:10:29,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:29,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:10:29,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:10:29,078 INFO L87 Difference]: Start difference. First operand 981 states and 3462 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:29,698 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-10 22:10:29,971 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-03-10 22:10:30,313 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-03-10 22:10:30,666 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-10 22:10:30,911 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-03-10 22:10:31,258 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-03-10 22:10:31,440 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-03-10 22:10:31,761 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2021-03-10 22:10:32,098 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-03-10 22:10:32,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:32,161 INFO L93 Difference]: Finished difference Result 2055 states and 6701 transitions. [2021-03-10 22:10:32,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:10:32,162 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:10:32,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:32,165 INFO L225 Difference]: With dead ends: 2055 [2021-03-10 22:10:32,165 INFO L226 Difference]: Without dead ends: 1956 [2021-03-10 22:10:32,165 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 2883.5ms TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:10:32,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2021-03-10 22:10:32,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 984. [2021-03-10 22:10:32,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 3.5289928789420144) internal successors, (3469), 983 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:32,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 3469 transitions. [2021-03-10 22:10:32,181 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 3469 transitions. Word has length 21 [2021-03-10 22:10:32,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:32,181 INFO L480 AbstractCegarLoop]: Abstraction has 984 states and 3469 transitions. [2021-03-10 22:10:32,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:32,181 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 3469 transitions. [2021-03-10 22:10:32,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:10:32,182 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:32,182 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:32,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8119,684 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:32,383 INFO L428 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:32,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:32,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1589103349, now seen corresponding path program 42 times [2021-03-10 22:10:32,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:32,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531000722] [2021-03-10 22:10:32,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:32,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531000722] [2021-03-10 22:10:32,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374660094] [2021-03-10 22:10:32,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:32,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:10:32,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:32,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:10:32,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:32,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:32,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:32,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:10:32,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:32,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:32,758 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:32,760 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:32,761 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:32,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:32,767 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:32,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:32,772 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:32,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:10:32,777 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:32,894 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 22:10:32,895 INFO L628 ElimStorePlain]: treesize reduction 25, result has 77.1 percent of original size [2021-03-10 22:10:32,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:10:32,896 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:202, output treesize:84 [2021-03-10 22:10:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:10:33,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:33,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 22:10:33,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596602214] [2021-03-10 22:10:33,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:33,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:33,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:33,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:33,219 INFO L87 Difference]: Start difference. First operand 984 states and 3469 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:33,814 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-10 22:10:34,184 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-03-10 22:10:34,489 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-03-10 22:10:34,784 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-03-10 22:10:35,056 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-03-10 22:10:35,361 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-03-10 22:10:35,587 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-03-10 22:10:35,839 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-03-10 22:10:36,259 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-03-10 22:10:36,506 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-03-10 22:10:36,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:36,824 INFO L93 Difference]: Finished difference Result 2209 states and 7117 transitions. [2021-03-10 22:10:36,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:10:36,825 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:10:36,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:36,828 INFO L225 Difference]: With dead ends: 2209 [2021-03-10 22:10:36,828 INFO L226 Difference]: Without dead ends: 2107 [2021-03-10 22:10:36,828 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 3328.6ms TimeCoverageRelationStatistics Valid=313, Invalid=1019, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:10:36,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2021-03-10 22:10:36,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 991. [2021-03-10 22:10:36,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 3.536363636363636) internal successors, (3501), 990 states have internal predecessors, (3501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:36,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 3501 transitions. [2021-03-10 22:10:36,843 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 3501 transitions. Word has length 21 [2021-03-10 22:10:36,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:36,843 INFO L480 AbstractCegarLoop]: Abstraction has 991 states and 3501 transitions. [2021-03-10 22:10:36,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:36,844 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 3501 transitions. [2021-03-10 22:10:36,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:10:36,845 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:36,845 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:37,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 685 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8133 [2021-03-10 22:10:37,045 INFO L428 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:37,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:37,045 INFO L82 PathProgramCache]: Analyzing trace with hash 831786613, now seen corresponding path program 43 times [2021-03-10 22:10:37,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:37,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612784328] [2021-03-10 22:10:37,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:37,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612784328] [2021-03-10 22:10:37,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010201295] [2021-03-10 22:10:37,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:37,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:10:37,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:37,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:37,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:37,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:10:37,441 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:37,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:37,446 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:37,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:37,452 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:37,455 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:37,456 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:37,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:37,462 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:37,465 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:37,466 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:37,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:10:37,471 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:37,571 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 22:10:37,572 INFO L628 ElimStorePlain]: treesize reduction 23, result has 78.5 percent of original size [2021-03-10 22:10:37,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:10:37,573 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:220, output treesize:84 [2021-03-10 22:10:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:10:37,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:37,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 22:10:37,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079413425] [2021-03-10 22:10:37,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:37,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:37,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:37,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:37,914 INFO L87 Difference]: Start difference. First operand 991 states and 3501 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:38,546 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-03-10 22:10:38,855 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-03-10 22:10:39,200 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-03-10 22:10:39,544 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-03-10 22:10:39,784 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-03-10 22:10:40,048 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-03-10 22:10:40,242 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-03-10 22:10:40,566 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-03-10 22:10:40,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:40,725 INFO L93 Difference]: Finished difference Result 2124 states and 6911 transitions. [2021-03-10 22:10:40,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:10:40,726 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:10:40,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:40,729 INFO L225 Difference]: With dead ends: 2124 [2021-03-10 22:10:40,729 INFO L226 Difference]: Without dead ends: 2061 [2021-03-10 22:10:40,729 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 2588.4ms TimeCoverageRelationStatistics Valid=233, Invalid=823, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:10:40,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-03-10 22:10:40,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 982. [2021-03-10 22:10:40,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 3.5310907237512743) internal successors, (3464), 981 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:40,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 3464 transitions. [2021-03-10 22:10:40,744 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 3464 transitions. Word has length 21 [2021-03-10 22:10:40,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:40,744 INFO L480 AbstractCegarLoop]: Abstraction has 982 states and 3464 transitions. [2021-03-10 22:10:40,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:40,744 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 3464 transitions. [2021-03-10 22:10:40,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:10:40,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:40,745 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:40,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 686 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8146 [2021-03-10 22:10:40,946 INFO L428 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:40,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:40,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1286169317, now seen corresponding path program 44 times [2021-03-10 22:10:40,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:40,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159394406] [2021-03-10 22:10:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:41,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:41,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159394406] [2021-03-10 22:10:41,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504594819] [2021-03-10 22:10:41,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:41,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:41,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:41,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:10:41,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:41,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:41,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:41,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:41,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:41,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:41,422 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:41,425 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:41,426 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:41,430 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:41,431 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:41,435 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:41,436 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:41,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:41,441 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:41,444 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:41,445 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:41,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:41,450 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:41,534 INFO L628 ElimStorePlain]: treesize reduction 19, result has 74.7 percent of original size [2021-03-10 22:10:41,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:10:41,535 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:216, output treesize:56 [2021-03-10 22:10:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:10:41,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:41,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 22:10:41,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905497119] [2021-03-10 22:10:41,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:41,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:41,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:41,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:41,721 INFO L87 Difference]: Start difference. First operand 982 states and 3464 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:42,450 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-03-10 22:10:42,594 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-03-10 22:10:42,922 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-03-10 22:10:43,089 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 22:10:43,271 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-03-10 22:10:43,567 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-03-10 22:10:43,734 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 22:10:43,893 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-03-10 22:10:44,330 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-03-10 22:10:44,476 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 22:10:44,705 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-03-10 22:10:44,949 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2021-03-10 22:10:45,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:45,189 INFO L93 Difference]: Finished difference Result 2179 states and 7057 transitions. [2021-03-10 22:10:45,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:10:45,190 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:10:45,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:45,193 INFO L225 Difference]: With dead ends: 2179 [2021-03-10 22:10:45,193 INFO L226 Difference]: Without dead ends: 2002 [2021-03-10 22:10:45,193 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 3120.1ms TimeCoverageRelationStatistics Valid=307, Invalid=1333, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:10:45,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2021-03-10 22:10:45,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1006. [2021-03-10 22:10:45,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 3.546268656716418) internal successors, (3564), 1005 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:45,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3564 transitions. [2021-03-10 22:10:45,209 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3564 transitions. Word has length 21 [2021-03-10 22:10:45,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:45,209 INFO L480 AbstractCegarLoop]: Abstraction has 1006 states and 3564 transitions. [2021-03-10 22:10:45,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:45,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3564 transitions. [2021-03-10 22:10:45,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:10:45,210 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:45,210 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:45,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8162,687 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:45,410 INFO L428 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:45,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:45,411 INFO L82 PathProgramCache]: Analyzing trace with hash -961499941, now seen corresponding path program 45 times [2021-03-10 22:10:45,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:45,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314390141] [2021-03-10 22:10:45,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:45,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314390141] [2021-03-10 22:10:45,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096804770] [2021-03-10 22:10:45,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:45,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:10:45,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:45,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:10:45,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:45,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:45,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:45,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:10:45,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:45,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:45,888 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:45,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-10 22:10:45,894 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:45,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:10:45,901 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:45,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:45,907 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:45,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:10:45,913 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:45,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:45,919 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:45,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:45,925 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:45,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-03-10 22:10:45,931 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:45,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:45,937 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:45,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:10:45,943 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:45,948 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:45,949 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:45,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:45,955 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:45,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:10:45,961 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:45,965 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:45,966 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:46,176 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-10 22:10:46,177 INFO L628 ElimStorePlain]: treesize reduction 127, result has 52.3 percent of original size [2021-03-10 22:10:46,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-03-10 22:10:46,178 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:535, output treesize:139 [2021-03-10 22:10:46,304 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 22:10:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:46,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:46,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-03-10 22:10:46,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508698174] [2021-03-10 22:10:46,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:10:46,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:46,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:10:46,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:10:46,576 INFO L87 Difference]: Start difference. First operand 1006 states and 3564 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:47,470 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-03-10 22:10:47,794 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-03-10 22:10:48,072 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-03-10 22:10:48,218 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-03-10 22:10:48,389 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 22:10:48,581 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-03-10 22:10:48,886 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-03-10 22:10:49,068 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-03-10 22:10:49,232 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-03-10 22:10:49,384 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 22:10:49,530 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-10 22:10:49,691 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-10 22:10:49,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:49,787 INFO L93 Difference]: Finished difference Result 1567 states and 5136 transitions. [2021-03-10 22:10:49,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:10:49,788 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:10:49,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:49,790 INFO L225 Difference]: With dead ends: 1567 [2021-03-10 22:10:49,790 INFO L226 Difference]: Without dead ends: 1519 [2021-03-10 22:10:49,790 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 3027.3ms TimeCoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:10:49,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-03-10 22:10:49,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1006. [2021-03-10 22:10:49,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 3.546268656716418) internal successors, (3564), 1005 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:49,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3564 transitions. [2021-03-10 22:10:49,803 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3564 transitions. Word has length 21 [2021-03-10 22:10:49,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:49,803 INFO L480 AbstractCegarLoop]: Abstraction has 1006 states and 3564 transitions. [2021-03-10 22:10:49,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:49,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3564 transitions. [2021-03-10 22:10:49,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:10:49,804 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:49,804 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:50,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8176,688 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:50,013 INFO L428 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:50,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:50,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1283808219, now seen corresponding path program 46 times [2021-03-10 22:10:50,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:50,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060951920] [2021-03-10 22:10:50,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:50,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060951920] [2021-03-10 22:10:50,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374559821] [2021-03-10 22:10:50,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:50,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:10:50,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:50,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:10:50,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:50,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:50,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:50,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:50,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:50,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:50,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:50,595 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:50,596 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:50,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:50,601 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:50,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:50,606 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:50,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:50,610 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:50,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:50,615 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:50,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:50,619 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:50,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:50,623 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:50,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:50,628 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:50,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:50,632 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:50,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:50,637 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:50,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:50,640 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:50,719 INFO L628 ElimStorePlain]: treesize reduction 124, result has 31.1 percent of original size [2021-03-10 22:10:50,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:10:50,720 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 1 variables, input treesize:328, output treesize:56 [2021-03-10 22:10:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:50,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:50,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-10 22:10:50,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835337969] [2021-03-10 22:10:50,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:10:50,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:50,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:10:50,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:10:50,886 INFO L87 Difference]: Start difference. First operand 1006 states and 3564 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:51,406 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-03-10 22:10:51,675 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 22:10:52,099 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 22:10:52,269 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 22:10:52,434 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-03-10 22:10:52,687 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-03-10 22:10:52,872 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-03-10 22:10:53,145 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-03-10 22:10:53,360 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-03-10 22:10:53,575 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-03-10 22:10:53,766 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-03-10 22:10:54,069 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-03-10 22:10:54,224 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-03-10 22:10:54,537 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-03-10 22:10:54,693 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-03-10 22:10:54,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:54,788 INFO L93 Difference]: Finished difference Result 2254 states and 7149 transitions. [2021-03-10 22:10:54,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 22:10:54,789 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:10:54,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:54,792 INFO L225 Difference]: With dead ends: 2254 [2021-03-10 22:10:54,792 INFO L226 Difference]: Without dead ends: 2167 [2021-03-10 22:10:54,792 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 3581.7ms TimeCoverageRelationStatistics Valid=318, Invalid=1574, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 22:10:54,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2021-03-10 22:10:54,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 1016. [2021-03-10 22:10:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 3.555665024630542) internal successors, (3609), 1015 states have internal predecessors, (3609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:54,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 3609 transitions. [2021-03-10 22:10:54,807 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 3609 transitions. Word has length 21 [2021-03-10 22:10:54,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:54,807 INFO L480 AbstractCegarLoop]: Abstraction has 1016 states and 3609 transitions. [2021-03-10 22:10:54,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:54,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 3609 transitions. [2021-03-10 22:10:54,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:10:54,808 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:54,808 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:55,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8192,689 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:55,009 INFO L428 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:55,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:55,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1718816677, now seen corresponding path program 47 times [2021-03-10 22:10:55,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:55,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503906229] [2021-03-10 22:10:55,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:55,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:55,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503906229] [2021-03-10 22:10:55,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207027894] [2021-03-10 22:10:55,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:55,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:10:55,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:55,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:10:55,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:55,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:55,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:55,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:55,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:55,473 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:55,474 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:55,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:55,478 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:55,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:55,482 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:55,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:55,485 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:55,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:55,488 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:55,535 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-03-10 22:10:55,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:10:55,536 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-03-10 22:10:55,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:55,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:55,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-03-10 22:10:55,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30824444] [2021-03-10 22:10:55,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:55,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:55,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:55,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:55,632 INFO L87 Difference]: Start difference. First operand 1016 states and 3609 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:56,324 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-03-10 22:10:56,613 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-03-10 22:10:56,744 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 22:10:56,958 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-10 22:10:57,284 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-03-10 22:10:57,547 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 22:10:57,894 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 22:10:58,086 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 22:10:58,470 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-03-10 22:10:58,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:58,500 INFO L93 Difference]: Finished difference Result 1757 states and 5715 transitions. [2021-03-10 22:10:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:10:58,501 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:10:58,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:58,503 INFO L225 Difference]: With dead ends: 1757 [2021-03-10 22:10:58,503 INFO L226 Difference]: Without dead ends: 1596 [2021-03-10 22:10:58,503 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 2484.1ms TimeCoverageRelationStatistics Valid=256, Invalid=934, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:10:58,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-03-10 22:10:58,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1029. [2021-03-10 22:10:58,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 3.559338521400778) internal successors, (3659), 1028 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3659 transitions. [2021-03-10 22:10:58,516 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3659 transitions. Word has length 21 [2021-03-10 22:10:58,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:58,516 INFO L480 AbstractCegarLoop]: Abstraction has 1029 states and 3659 transitions. [2021-03-10 22:10:58,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:58,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3659 transitions. [2021-03-10 22:10:58,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:10:58,517 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:58,517 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:58,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 690 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8209 [2021-03-10 22:10:58,718 INFO L428 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:58,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:58,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1304544747, now seen corresponding path program 48 times [2021-03-10 22:10:58,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:58,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040551662] [2021-03-10 22:10:58,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:58,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040551662] [2021-03-10 22:10:58,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479005832] [2021-03-10 22:10:58,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:59,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:10:59,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:59,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:10:59,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:59,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:59,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:59,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:59,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:59,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:59,317 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:59,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:59,322 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:59,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:59,328 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:59,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:59,333 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:59,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:59,339 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:59,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:10:59,344 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:59,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:10:59,350 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:59,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:10:59,355 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:59,438 INFO L628 ElimStorePlain]: treesize reduction 84, result has 40.0 percent of original size [2021-03-10 22:10:59,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:10:59,439 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 1 variables, input treesize:226, output treesize:56 [2021-03-10 22:10:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:10:59,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:59,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-10 22:10:59,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772112521] [2021-03-10 22:10:59,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:10:59,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:59,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:10:59,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:10:59,603 INFO L87 Difference]: Start difference. First operand 1029 states and 3659 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:00,345 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-10 22:11:00,758 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-03-10 22:11:00,924 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-10 22:11:01,089 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 22:11:01,434 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 22:11:01,588 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-10 22:11:01,747 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-03-10 22:11:01,972 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-03-10 22:11:02,217 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-03-10 22:11:02,384 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-10 22:11:02,606 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-03-10 22:11:02,743 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-03-10 22:11:02,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:02,942 INFO L93 Difference]: Finished difference Result 2052 states and 6611 transitions. [2021-03-10 22:11:02,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:11:02,943 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:11:02,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:02,946 INFO L225 Difference]: With dead ends: 2052 [2021-03-10 22:11:02,946 INFO L226 Difference]: Without dead ends: 1944 [2021-03-10 22:11:02,946 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 3066.4ms TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:11:02,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-03-10 22:11:02,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1028. [2021-03-10 22:11:02,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 3.5559883154819865) internal successors, (3652), 1027 states have internal predecessors, (3652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:02,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 3652 transitions. [2021-03-10 22:11:02,965 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 3652 transitions. Word has length 21 [2021-03-10 22:11:02,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:02,965 INFO L480 AbstractCegarLoop]: Abstraction has 1028 states and 3652 transitions. [2021-03-10 22:11:02,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:02,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 3652 transitions. [2021-03-10 22:11:02,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:11:02,967 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:02,967 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:03,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8219,691 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:03,167 INFO L428 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:03,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:03,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1914839603, now seen corresponding path program 49 times [2021-03-10 22:11:03,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:03,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535707009] [2021-03-10 22:11:03,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:03,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535707009] [2021-03-10 22:11:03,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257314307] [2021-03-10 22:11:03,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:03,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:03,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:11:03,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:03,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:11:03,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:11:03,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:11:03,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:11:03,687 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:11:03,692 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:11:03,698 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:11:03,703 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:11:03,709 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:11:03,715 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:11:03,720 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:03,802 INFO L628 ElimStorePlain]: treesize reduction 84, result has 40.0 percent of original size [2021-03-10 22:11:03,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:11:03,803 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 1 variables, input treesize:226, output treesize:56 [2021-03-10 22:11:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:11:03,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:03,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 22:11:03,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685406025] [2021-03-10 22:11:03,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:03,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:03,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:03,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:03,962 INFO L87 Difference]: Start difference. First operand 1028 states and 3652 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:04,689 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 22:11:04,833 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 22:11:05,070 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-10 22:11:05,312 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-10 22:11:05,693 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-03-10 22:11:05,882 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-10 22:11:06,088 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-10 22:11:06,240 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-10 22:11:06,616 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-03-10 22:11:06,775 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-03-10 22:11:06,937 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 22:11:07,131 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-03-10 22:11:07,275 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-03-10 22:11:07,415 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-03-10 22:11:07,803 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-03-10 22:11:07,946 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-03-10 22:11:08,200 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-03-10 22:11:08,544 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-03-10 22:11:08,757 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-03-10 22:11:08,899 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-03-10 22:11:08,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:08,978 INFO L93 Difference]: Finished difference Result 1839 states and 5784 transitions. [2021-03-10 22:11:08,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 22:11:08,979 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:11:08,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:08,981 INFO L225 Difference]: With dead ends: 1839 [2021-03-10 22:11:08,981 INFO L226 Difference]: Without dead ends: 1527 [2021-03-10 22:11:08,981 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 4592.4ms TimeCoverageRelationStatistics Valid=438, Invalid=2214, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 22:11:08,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2021-03-10 22:11:08,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1030. [2021-03-10 22:11:08,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 3.5383867832847424) internal successors, (3641), 1029 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:08,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 3641 transitions. [2021-03-10 22:11:08,994 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 3641 transitions. Word has length 21 [2021-03-10 22:11:08,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:08,994 INFO L480 AbstractCegarLoop]: Abstraction has 1030 states and 3641 transitions. [2021-03-10 22:11:08,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:08,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 3641 transitions. [2021-03-10 22:11:08,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:11:08,996 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:08,996 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:09,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 692 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8241 [2021-03-10 22:11:09,196 INFO L428 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:09,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:09,196 INFO L82 PathProgramCache]: Analyzing trace with hash -2022278031, now seen corresponding path program 50 times [2021-03-10 22:11:09,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:09,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878174425] [2021-03-10 22:11:09,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:09,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:09,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878174425] [2021-03-10 22:11:09,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198806508] [2021-03-10 22:11:09,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:09,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:09,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:09,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:11:09,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:09,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:11:09,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:11:09,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:11:09,746 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:11:09,751 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:11:09,756 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:11:09,761 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:11:09,766 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:09,838 INFO L628 ElimStorePlain]: treesize reduction 61, result has 39.0 percent of original size [2021-03-10 22:11:09,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:11:09,840 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:167, output treesize:39 [2021-03-10 22:11:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:11:09,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:09,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 22:11:09,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413332123] [2021-03-10 22:11:09,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:09,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:09,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:09,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:09,974 INFO L87 Difference]: Start difference. First operand 1030 states and 3641 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:10,612 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-10 22:11:10,887 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-03-10 22:11:11,023 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-10 22:11:11,245 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-10 22:11:11,477 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-03-10 22:11:11,735 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-03-10 22:11:12,113 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-03-10 22:11:12,279 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 22:11:12,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:12,280 INFO L93 Difference]: Finished difference Result 1569 states and 5084 transitions. [2021-03-10 22:11:12,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:11:12,280 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:11:12,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:12,282 INFO L225 Difference]: With dead ends: 1569 [2021-03-10 22:11:12,282 INFO L226 Difference]: Without dead ends: 1542 [2021-03-10 22:11:12,282 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 2164.6ms TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:11:12,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2021-03-10 22:11:12,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1030. [2021-03-10 22:11:12,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 3.5383867832847424) internal successors, (3641), 1029 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:12,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 3641 transitions. [2021-03-10 22:11:12,297 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 3641 transitions. Word has length 21 [2021-03-10 22:11:12,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:12,297 INFO L480 AbstractCegarLoop]: Abstraction has 1030 states and 3641 transitions. [2021-03-10 22:11:12,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:12,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 3641 transitions. [2021-03-10 22:11:12,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:11:12,298 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:12,298 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:12,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 693 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8261 [2021-03-10 22:11:12,498 INFO L428 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:12,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:12,498 INFO L82 PathProgramCache]: Analyzing trace with hash 243766657, now seen corresponding path program 51 times [2021-03-10 22:11:12,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:12,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860928234] [2021-03-10 22:11:12,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:12,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860928234] [2021-03-10 22:11:12,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791263403] [2021-03-10 22:11:12,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:12,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:11:12,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:12,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:11:12,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:12,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:11:12,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:12,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:11:12,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:12,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:11:12,916 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:12,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:11:12,921 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:12,924 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:12,925 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:12,986 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-03-10 22:11:12,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:11:12,987 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-03-10 22:11:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:13,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:13,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-03-10 22:11:13,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68456801] [2021-03-10 22:11:13,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:11:13,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:13,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:11:13,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:11:13,128 INFO L87 Difference]: Start difference. First operand 1030 states and 3641 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:13,960 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-10 22:11:14,253 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-10 22:11:14,460 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-10 22:11:14,649 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-03-10 22:11:15,103 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-03-10 22:11:15,294 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-03-10 22:11:15,470 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-10 22:11:15,658 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-10 22:11:15,849 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-10 22:11:16,043 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-03-10 22:11:16,161 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-10 22:11:16,420 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-10 22:11:16,606 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 22:11:16,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:16,751 INFO L93 Difference]: Finished difference Result 2260 states and 7168 transitions. [2021-03-10 22:11:16,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 22:11:16,752 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:11:16,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:16,754 INFO L225 Difference]: With dead ends: 2260 [2021-03-10 22:11:16,754 INFO L226 Difference]: Without dead ends: 1987 [2021-03-10 22:11:16,755 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 3198.2ms TimeCoverageRelationStatistics Valid=327, Invalid=1313, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 22:11:16,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-03-10 22:11:16,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1019. [2021-03-10 22:11:16,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 3.519646365422397) internal successors, (3583), 1018 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:16,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3583 transitions. [2021-03-10 22:11:16,770 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3583 transitions. Word has length 21 [2021-03-10 22:11:16,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:16,770 INFO L480 AbstractCegarLoop]: Abstraction has 1019 states and 3583 transitions. [2021-03-10 22:11:16,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:16,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3583 transitions. [2021-03-10 22:11:16,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:11:16,771 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:16,771 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:16,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8274,694 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:16,972 INFO L428 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:16,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:16,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1693212237, now seen corresponding path program 52 times [2021-03-10 22:11:16,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:16,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586035180] [2021-03-10 22:11:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:17,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586035180] [2021-03-10 22:11:17,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326720513] [2021-03-10 22:11:17,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:17,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:11:17,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:17,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 22:11:17,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:11:17,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:17,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 22:11:17,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462979039] [2021-03-10 22:11:17,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:17,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:17,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:17,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:17,537 INFO L87 Difference]: Start difference. First operand 1019 states and 3583 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:18,039 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-10 22:11:18,255 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-10 22:11:18,546 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-03-10 22:11:18,809 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-03-10 22:11:18,992 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-03-10 22:11:19,141 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-03-10 22:11:19,652 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 22:11:19,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:19,733 INFO L93 Difference]: Finished difference Result 1504 states and 4862 transitions. [2021-03-10 22:11:19,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:11:19,734 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:11:19,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:19,736 INFO L225 Difference]: With dead ends: 1504 [2021-03-10 22:11:19,736 INFO L226 Difference]: Without dead ends: 1456 [2021-03-10 22:11:19,737 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2086.7ms TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:11:19,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-03-10 22:11:19,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1029. [2021-03-10 22:11:19,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 3.5136186770428015) internal successors, (3612), 1028 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:19,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3612 transitions. [2021-03-10 22:11:19,750 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3612 transitions. Word has length 21 [2021-03-10 22:11:19,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:19,750 INFO L480 AbstractCegarLoop]: Abstraction has 1029 states and 3612 transitions. [2021-03-10 22:11:19,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:19,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3612 transitions. [2021-03-10 22:11:19,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 22:11:19,752 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:19,752 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:19,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 695 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8286 [2021-03-10 22:11:19,952 INFO L428 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:19,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:19,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1122810741, now seen corresponding path program 53 times [2021-03-10 22:11:19,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:19,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919978586] [2021-03-10 22:11:19,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:20,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919978586] [2021-03-10 22:11:20,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300672519] [2021-03-10 22:11:20,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:20,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:11:20,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:20,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 22:11:20,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:20,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:11:20,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:20,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:11:20,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:20,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:20,380 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:20,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:11:20,385 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:20,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:11:20,390 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:20,452 INFO L628 ElimStorePlain]: treesize reduction 11, result has 73.2 percent of original size [2021-03-10 22:11:20,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:11:20,453 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:101, output treesize:30 [2021-03-10 22:11:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:11:20,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:20,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-03-10 22:11:20,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038257303] [2021-03-10 22:11:20,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:11:20,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:20,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:11:20,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:11:20,553 INFO L87 Difference]: Start difference. First operand 1029 states and 3612 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:21,413 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 22:11:21,564 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-03-10 22:11:21,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:21,646 INFO L93 Difference]: Finished difference Result 1552 states and 5027 transitions. [2021-03-10 22:11:21,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:11:21,647 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 22:11:21,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:21,649 INFO L225 Difference]: With dead ends: 1552 [2021-03-10 22:11:21,649 INFO L226 Difference]: Without dead ends: 1492 [2021-03-10 22:11:21,649 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 913.9ms TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:11:21,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-03-10 22:11:21,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1015. [2021-03-10 22:11:21,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 3.5236686390532546) internal successors, (3573), 1014 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:21,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3573 transitions. [2021-03-10 22:11:21,661 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3573 transitions. Word has length 21 [2021-03-10 22:11:21,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:21,662 INFO L480 AbstractCegarLoop]: Abstraction has 1015 states and 3573 transitions. [2021-03-10 22:11:21,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:21,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3573 transitions. [2021-03-10 22:11:21,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:11:21,663 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:21,663 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:21,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8295,696 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:21,863 INFO L428 AbstractCegarLoop]: === Iteration 697 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:21,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:21,863 INFO L82 PathProgramCache]: Analyzing trace with hash 711794691, now seen corresponding path program 641 times [2021-03-10 22:11:21,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:21,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837645284] [2021-03-10 22:11:21,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:21,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837645284] [2021-03-10 22:11:21,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778142907] [2021-03-10 22:11:21,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:22,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:11:22,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:22,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:11:22,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:22,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:11:22,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:22,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:11:22,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:22,211 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 22:11:22,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:11:22,212 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 22:11:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:22,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:22,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 22:11:22,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475795139] [2021-03-10 22:11:22,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:11:22,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:22,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:11:22,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:11:22,274 INFO L87 Difference]: Start difference. First operand 1015 states and 3573 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:22,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:22,810 INFO L93 Difference]: Finished difference Result 1537 states and 5102 transitions. [2021-03-10 22:11:22,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:11:22,811 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:11:22,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:22,813 INFO L225 Difference]: With dead ends: 1537 [2021-03-10 22:11:22,813 INFO L226 Difference]: Without dead ends: 1467 [2021-03-10 22:11:22,813 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 340.4ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:11:22,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2021-03-10 22:11:22,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1001. [2021-03-10 22:11:22,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 1000 states have (on average 3.531) internal successors, (3531), 1000 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:22,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 3531 transitions. [2021-03-10 22:11:22,826 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 3531 transitions. Word has length 22 [2021-03-10 22:11:22,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:22,826 INFO L480 AbstractCegarLoop]: Abstraction has 1001 states and 3531 transitions. [2021-03-10 22:11:22,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 3531 transitions. [2021-03-10 22:11:22,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:11:22,827 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:22,827 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:23,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8307,697 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:23,027 INFO L428 AbstractCegarLoop]: === Iteration 698 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:23,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:23,028 INFO L82 PathProgramCache]: Analyzing trace with hash -955884418, now seen corresponding path program 642 times [2021-03-10 22:11:23,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:23,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513417664] [2021-03-10 22:11:23,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:23,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513417664] [2021-03-10 22:11:23,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458361579] [2021-03-10 22:11:23,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:23,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:11:23,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:23,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:11:23,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:23,664 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:23,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:23,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:23,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:11:23,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:23,694 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-03-10 22:11:23,695 INFO L518 ElimStorePlain]: Eliminatee v_prenex_216 vanished before elimination [2021-03-10 22:11:23,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:11:23,697 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-03-10 22:11:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:23,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:23,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:11:23,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194199079] [2021-03-10 22:11:23,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:11:23,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:23,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:11:23,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:11:23,793 INFO L87 Difference]: Start difference. First operand 1001 states and 3531 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:24,310 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2021-03-10 22:11:24,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:24,929 INFO L93 Difference]: Finished difference Result 1428 states and 4727 transitions. [2021-03-10 22:11:24,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:24,930 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:11:24,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:24,932 INFO L225 Difference]: With dead ends: 1428 [2021-03-10 22:11:24,933 INFO L226 Difference]: Without dead ends: 1428 [2021-03-10 22:11:24,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1103.6ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:11:24,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-03-10 22:11:24,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1023. [2021-03-10 22:11:24,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 3.50880626223092) internal successors, (3586), 1022 states have internal predecessors, (3586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:24,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 3586 transitions. [2021-03-10 22:11:24,946 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 3586 transitions. Word has length 22 [2021-03-10 22:11:24,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:24,946 INFO L480 AbstractCegarLoop]: Abstraction has 1023 states and 3586 transitions. [2021-03-10 22:11:24,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:24,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 3586 transitions. [2021-03-10 22:11:24,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:11:24,947 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:24,948 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:25,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8311,698 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:25,148 INFO L428 AbstractCegarLoop]: === Iteration 699 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:25,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:25,148 INFO L82 PathProgramCache]: Analyzing trace with hash 202759112, now seen corresponding path program 643 times [2021-03-10 22:11:25,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:25,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882920919] [2021-03-10 22:11:25,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:25,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:25,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882920919] [2021-03-10 22:11:25,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072202432] [2021-03-10 22:11:25,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:25,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:11:25,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:25,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:25,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:25,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-03-10 22:11:25,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:25,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:11:25,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:25,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:25,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:25,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:25,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:11:25,792 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:25,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:11:25,795 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:25,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:25,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:11:25,814 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:73, output treesize:6 [2021-03-10 22:11:25,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:25,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:25,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:11:25,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574660592] [2021-03-10 22:11:25,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:11:25,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:25,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:11:25,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:11:25,895 INFO L87 Difference]: Start difference. First operand 1023 states and 3586 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:26,943 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-03-10 22:11:27,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:27,125 INFO L93 Difference]: Finished difference Result 1480 states and 4848 transitions. [2021-03-10 22:11:27,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:27,125 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:11:27,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:27,127 INFO L225 Difference]: With dead ends: 1480 [2021-03-10 22:11:27,127 INFO L226 Difference]: Without dead ends: 1480 [2021-03-10 22:11:27,127 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1076.6ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:11:27,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-03-10 22:11:27,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1026. [2021-03-10 22:11:27,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1025 states have (on average 3.509268292682927) internal successors, (3597), 1025 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:27,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 3597 transitions. [2021-03-10 22:11:27,140 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 3597 transitions. Word has length 22 [2021-03-10 22:11:27,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:27,140 INFO L480 AbstractCegarLoop]: Abstraction has 1026 states and 3597 transitions. [2021-03-10 22:11:27,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:27,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 3597 transitions. [2021-03-10 22:11:27,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:11:27,141 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:27,141 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:27,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 699 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8332 [2021-03-10 22:11:27,342 INFO L428 AbstractCegarLoop]: === Iteration 700 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:27,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:27,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1291148610, now seen corresponding path program 644 times [2021-03-10 22:11:27,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:27,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666533373] [2021-03-10 22:11:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:27,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666533373] [2021-03-10 22:11:27,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213916755] [2021-03-10 22:11:27,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:27,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:27,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:27,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:11:27,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:28,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:28,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-03-10 22:11:28,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:28,032 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-03-10 22:11:28,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:28,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:11:28,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:28,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:28,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:11:28,048 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-03-10 22:11:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:28,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:28,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:11:28,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104102140] [2021-03-10 22:11:28,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:11:28,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:28,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:11:28,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:11:28,142 INFO L87 Difference]: Start difference. First operand 1026 states and 3597 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:28,726 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2021-03-10 22:11:28,893 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-03-10 22:11:29,117 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-03-10 22:11:29,314 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2021-03-10 22:11:29,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:29,354 INFO L93 Difference]: Finished difference Result 1437 states and 4745 transitions. [2021-03-10 22:11:29,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:29,355 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:11:29,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:29,357 INFO L225 Difference]: With dead ends: 1437 [2021-03-10 22:11:29,357 INFO L226 Difference]: Without dead ends: 1431 [2021-03-10 22:11:29,357 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1246.5ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:11:29,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2021-03-10 22:11:29,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 1018. [2021-03-10 22:11:29,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 3.5132743362831858) internal successors, (3573), 1017 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:29,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 3573 transitions. [2021-03-10 22:11:29,371 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 3573 transitions. Word has length 22 [2021-03-10 22:11:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:29,371 INFO L480 AbstractCegarLoop]: Abstraction has 1018 states and 3573 transitions. [2021-03-10 22:11:29,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:29,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 3573 transitions. [2021-03-10 22:11:29,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:11:29,372 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:29,372 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:29,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 700 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8350 [2021-03-10 22:11:29,572 INFO L428 AbstractCegarLoop]: === Iteration 701 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:29,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:29,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1296850700, now seen corresponding path program 645 times [2021-03-10 22:11:29,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:29,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465273722] [2021-03-10 22:11:29,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:29,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465273722] [2021-03-10 22:11:29,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923283729] [2021-03-10 22:11:29,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:29,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:11:29,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:29,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:11:29,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:30,369 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-10 22:11:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:30,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:30,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:11:30,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407981470] [2021-03-10 22:11:30,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:11:30,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:30,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:11:30,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:11:30,474 INFO L87 Difference]: Start difference. First operand 1018 states and 3573 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:31,403 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2021-03-10 22:11:31,562 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-03-10 22:11:31,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:31,729 INFO L93 Difference]: Finished difference Result 1407 states and 4653 transitions. [2021-03-10 22:11:31,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:31,730 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:11:31,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:31,731 INFO L225 Difference]: With dead ends: 1407 [2021-03-10 22:11:31,731 INFO L226 Difference]: Without dead ends: 1407 [2021-03-10 22:11:31,732 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1365.4ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:11:31,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-03-10 22:11:31,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1024. [2021-03-10 22:11:31,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 3.5141739980449658) internal successors, (3595), 1023 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:31,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 3595 transitions. [2021-03-10 22:11:31,744 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 3595 transitions. Word has length 22 [2021-03-10 22:11:31,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:31,744 INFO L480 AbstractCegarLoop]: Abstraction has 1024 states and 3595 transitions. [2021-03-10 22:11:31,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:31,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 3595 transitions. [2021-03-10 22:11:31,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:11:31,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:31,745 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:31,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 701 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8367 [2021-03-10 22:11:31,946 INFO L428 AbstractCegarLoop]: === Iteration 702 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:31,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:31,946 INFO L82 PathProgramCache]: Analyzing trace with hash -197057022, now seen corresponding path program 646 times [2021-03-10 22:11:31,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:31,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671753924] [2021-03-10 22:11:31,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:32,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671753924] [2021-03-10 22:11:32,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43977609] [2021-03-10 22:11:32,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:32,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:11:32,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:32,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:11:32,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:32,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:32,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:11:32,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827336027] [2021-03-10 22:11:32,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:11:32,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:32,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:11:32,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:11:32,735 INFO L87 Difference]: Start difference. First operand 1024 states and 3595 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:33,450 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2021-03-10 22:11:33,802 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-03-10 22:11:34,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:34,077 INFO L93 Difference]: Finished difference Result 1413 states and 4660 transitions. [2021-03-10 22:11:34,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:34,077 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:11:34,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:34,079 INFO L225 Difference]: With dead ends: 1413 [2021-03-10 22:11:34,079 INFO L226 Difference]: Without dead ends: 1407 [2021-03-10 22:11:34,080 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1355.4ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:11:34,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-03-10 22:11:34,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1021. [2021-03-10 22:11:34,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 3.5137254901960784) internal successors, (3584), 1020 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:34,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 3584 transitions. [2021-03-10 22:11:34,092 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 3584 transitions. Word has length 22 [2021-03-10 22:11:34,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:34,093 INFO L480 AbstractCegarLoop]: Abstraction has 1021 states and 3584 transitions. [2021-03-10 22:11:34,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:34,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 3584 transitions. [2021-03-10 22:11:34,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:11:34,094 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:34,094 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:34,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8383,702 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:34,294 INFO L428 AbstractCegarLoop]: === Iteration 703 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:34,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:34,294 INFO L82 PathProgramCache]: Analyzing trace with hash 340798556, now seen corresponding path program 647 times [2021-03-10 22:11:34,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:34,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549704060] [2021-03-10 22:11:34,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:34,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549704060] [2021-03-10 22:11:34,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728047068] [2021-03-10 22:11:34,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:34,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:11:34,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:34,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:11:34,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:35,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:35,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:11:35,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840108413] [2021-03-10 22:11:35,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:11:35,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:35,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:11:35,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:11:35,152 INFO L87 Difference]: Start difference. First operand 1021 states and 3584 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:35,503 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2021-03-10 22:11:35,753 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2021-03-10 22:11:36,006 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 31 [2021-03-10 22:11:36,342 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-03-10 22:11:36,661 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2021-03-10 22:11:36,856 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-03-10 22:11:36,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:36,874 INFO L93 Difference]: Finished difference Result 1371 states and 4565 transitions. [2021-03-10 22:11:36,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:36,875 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:11:36,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:36,877 INFO L225 Difference]: With dead ends: 1371 [2021-03-10 22:11:36,877 INFO L226 Difference]: Without dead ends: 1359 [2021-03-10 22:11:36,877 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1732.2ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:11:36,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-03-10 22:11:36,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1013. [2021-03-10 22:11:36,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 3.5177865612648223) internal successors, (3560), 1012 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:36,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3560 transitions. [2021-03-10 22:11:36,895 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3560 transitions. Word has length 22 [2021-03-10 22:11:36,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:36,895 INFO L480 AbstractCegarLoop]: Abstraction has 1013 states and 3560 transitions. [2021-03-10 22:11:36,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:36,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3560 transitions. [2021-03-10 22:11:36,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:11:36,896 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:36,896 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:37,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 703 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8401 [2021-03-10 22:11:37,097 INFO L428 AbstractCegarLoop]: === Iteration 704 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:37,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:37,097 INFO L82 PathProgramCache]: Analyzing trace with hash 853951560, now seen corresponding path program 648 times [2021-03-10 22:11:37,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:37,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399147628] [2021-03-10 22:11:37,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:37,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399147628] [2021-03-10 22:11:37,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308275187] [2021-03-10 22:11:37,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:37,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:11:37,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:37,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:11:37,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:37,823 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-10 22:11:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:38,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:38,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:11:38,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877484801] [2021-03-10 22:11:38,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:11:38,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:38,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:11:38,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:11:38,062 INFO L87 Difference]: Start difference. First operand 1013 states and 3560 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:38,851 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2021-03-10 22:11:39,250 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2021-03-10 22:11:39,484 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2021-03-10 22:11:39,673 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 34 [2021-03-10 22:11:39,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:39,722 INFO L93 Difference]: Finished difference Result 1404 states and 4642 transitions. [2021-03-10 22:11:39,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:39,723 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:11:39,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:39,725 INFO L225 Difference]: With dead ends: 1404 [2021-03-10 22:11:39,725 INFO L226 Difference]: Without dead ends: 1404 [2021-03-10 22:11:39,725 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1787.4ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:11:39,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-03-10 22:11:39,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1022. [2021-03-10 22:11:39,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.5190989226248774) internal successors, (3593), 1021 states have internal predecessors, (3593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:39,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3593 transitions. [2021-03-10 22:11:39,737 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3593 transitions. Word has length 22 [2021-03-10 22:11:39,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:39,737 INFO L480 AbstractCegarLoop]: Abstraction has 1022 states and 3593 transitions. [2021-03-10 22:11:39,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:39,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3593 transitions. [2021-03-10 22:11:39,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:11:39,738 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:39,738 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:39,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8419,704 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:39,938 INFO L428 AbstractCegarLoop]: === Iteration 705 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:39,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:39,939 INFO L82 PathProgramCache]: Analyzing trace with hash -639956162, now seen corresponding path program 649 times [2021-03-10 22:11:39,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:39,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785143962] [2021-03-10 22:11:39,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:40,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785143962] [2021-03-10 22:11:40,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342067348] [2021-03-10 22:11:40,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:40,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:11:40,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:40,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:40,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:11:40,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772228991] [2021-03-10 22:11:40,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:11:40,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:40,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:11:40,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:11:40,859 INFO L87 Difference]: Start difference. First operand 1022 states and 3593 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:41,665 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2021-03-10 22:11:41,913 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2021-03-10 22:11:42,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:42,292 INFO L93 Difference]: Finished difference Result 1410 states and 4649 transitions. [2021-03-10 22:11:42,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:42,293 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:11:42,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:42,295 INFO L225 Difference]: With dead ends: 1410 [2021-03-10 22:11:42,295 INFO L226 Difference]: Without dead ends: 1404 [2021-03-10 22:11:42,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1471.4ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:11:42,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-03-10 22:11:42,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1019. [2021-03-10 22:11:42,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 3.518664047151277) internal successors, (3582), 1018 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:42,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3582 transitions. [2021-03-10 22:11:42,308 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3582 transitions. Word has length 22 [2021-03-10 22:11:42,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:42,308 INFO L480 AbstractCegarLoop]: Abstraction has 1019 states and 3582 transitions. [2021-03-10 22:11:42,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:42,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3582 transitions. [2021-03-10 22:11:42,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:11:42,309 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:42,309 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:42,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8438,705 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:42,510 INFO L428 AbstractCegarLoop]: === Iteration 706 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:42,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:42,510 INFO L82 PathProgramCache]: Analyzing trace with hash -102100584, now seen corresponding path program 650 times [2021-03-10 22:11:42,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:42,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102036132] [2021-03-10 22:11:42,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:42,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102036132] [2021-03-10 22:11:42,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397289960] [2021-03-10 22:11:42,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:42,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:42,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:42,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:11:42,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:43,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:43,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:43,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:11:43,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867850327] [2021-03-10 22:11:43,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:11:43,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:43,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:11:43,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:11:43,477 INFO L87 Difference]: Start difference. First operand 1019 states and 3582 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:44,436 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2021-03-10 22:11:44,735 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2021-03-10 22:11:45,016 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2021-03-10 22:11:45,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:45,190 INFO L93 Difference]: Finished difference Result 1374 states and 4567 transitions. [2021-03-10 22:11:45,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:45,191 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:11:45,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:45,193 INFO L225 Difference]: With dead ends: 1374 [2021-03-10 22:11:45,193 INFO L226 Difference]: Without dead ends: 1362 [2021-03-10 22:11:45,193 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1787.2ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:11:45,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-03-10 22:11:45,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1016. [2021-03-10 22:11:45,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 3.518226600985222) internal successors, (3571), 1015 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:45,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 3571 transitions. [2021-03-10 22:11:45,205 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 3571 transitions. Word has length 22 [2021-03-10 22:11:45,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:45,205 INFO L480 AbstractCegarLoop]: Abstraction has 1016 states and 3571 transitions. [2021-03-10 22:11:45,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:45,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 3571 transitions. [2021-03-10 22:11:45,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:11:45,207 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:45,207 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:45,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 706 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8452 [2021-03-10 22:11:45,407 INFO L428 AbstractCegarLoop]: === Iteration 707 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:45,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:45,407 INFO L82 PathProgramCache]: Analyzing trace with hash -608446850, now seen corresponding path program 651 times [2021-03-10 22:11:45,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:45,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902118419] [2021-03-10 22:11:45,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:45,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902118419] [2021-03-10 22:11:45,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410338770] [2021-03-10 22:11:45,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:45,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:11:45,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:45,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:11:45,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:46,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:46,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:11:46,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389456589] [2021-03-10 22:11:46,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:11:46,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:46,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:11:46,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:11:46,306 INFO L87 Difference]: Start difference. First operand 1016 states and 3571 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:47,243 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-03-10 22:11:47,647 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2021-03-10 22:11:47,839 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-03-10 22:11:47,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:47,994 INFO L93 Difference]: Finished difference Result 1365 states and 4543 transitions. [2021-03-10 22:11:47,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:47,995 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:11:47,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:47,997 INFO L225 Difference]: With dead ends: 1365 [2021-03-10 22:11:47,997 INFO L226 Difference]: Without dead ends: 1347 [2021-03-10 22:11:47,997 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1731.5ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:11:47,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-03-10 22:11:48,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1016. [2021-03-10 22:11:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 3.515270935960591) internal successors, (3568), 1015 states have internal predecessors, (3568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 3568 transitions. [2021-03-10 22:11:48,009 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 3568 transitions. Word has length 22 [2021-03-10 22:11:48,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:48,009 INFO L480 AbstractCegarLoop]: Abstraction has 1016 states and 3568 transitions. [2021-03-10 22:11:48,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:48,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 3568 transitions. [2021-03-10 22:11:48,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:11:48,011 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:48,011 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:48,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 707 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8466 [2021-03-10 22:11:48,211 INFO L428 AbstractCegarLoop]: === Iteration 708 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:48,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:48,211 INFO L82 PathProgramCache]: Analyzing trace with hash -835991344, now seen corresponding path program 652 times [2021-03-10 22:11:48,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:48,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961880299] [2021-03-10 22:11:48,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:48,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961880299] [2021-03-10 22:11:48,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066699531] [2021-03-10 22:11:48,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:48,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:11:48,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:48,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:11:48,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:49,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:49,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:11:49,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982341254] [2021-03-10 22:11:49,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:11:49,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:49,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:11:49,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:11:49,192 INFO L87 Difference]: Start difference. First operand 1016 states and 3568 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:49,684 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2021-03-10 22:11:49,959 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2021-03-10 22:11:50,258 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2021-03-10 22:11:50,515 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2021-03-10 22:11:50,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:50,716 INFO L93 Difference]: Finished difference Result 1468 states and 4799 transitions. [2021-03-10 22:11:50,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:50,716 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:11:50,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:50,718 INFO L225 Difference]: With dead ends: 1468 [2021-03-10 22:11:50,718 INFO L226 Difference]: Without dead ends: 1468 [2021-03-10 22:11:50,718 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1708.4ms TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:11:50,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-03-10 22:11:50,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1028. [2021-03-10 22:11:50,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 3.5170399221032134) internal successors, (3612), 1027 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:50,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 3612 transitions. [2021-03-10 22:11:50,731 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 3612 transitions. Word has length 22 [2021-03-10 22:11:50,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:50,731 INFO L480 AbstractCegarLoop]: Abstraction has 1028 states and 3612 transitions. [2021-03-10 22:11:50,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:50,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 3612 transitions. [2021-03-10 22:11:50,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:11:50,732 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:50,732 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:50,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8485,708 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:50,933 INFO L428 AbstractCegarLoop]: === Iteration 709 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:50,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:50,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1965068230, now seen corresponding path program 653 times [2021-03-10 22:11:50,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:50,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931468975] [2021-03-10 22:11:50,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:51,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931468975] [2021-03-10 22:11:51,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219829923] [2021-03-10 22:11:51,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:51,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:11:51,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:51,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:11:51,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:51,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:51,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:51,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:11:51,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814312397] [2021-03-10 22:11:51,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:11:51,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:51,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:11:51,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:11:51,896 INFO L87 Difference]: Start difference. First operand 1028 states and 3612 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:52,662 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-03-10 22:11:52,901 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-03-10 22:11:53,147 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-03-10 22:11:53,433 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-03-10 22:11:53,805 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-03-10 22:11:53,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:53,870 INFO L93 Difference]: Finished difference Result 1474 states and 4806 transitions. [2021-03-10 22:11:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:53,871 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:11:53,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:53,873 INFO L225 Difference]: With dead ends: 1474 [2021-03-10 22:11:53,873 INFO L226 Difference]: Without dead ends: 1468 [2021-03-10 22:11:53,873 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1974.1ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:11:53,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-03-10 22:11:53,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1025. [2021-03-10 22:11:53,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 3.5166015625) internal successors, (3601), 1024 states have internal predecessors, (3601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:53,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 3601 transitions. [2021-03-10 22:11:53,887 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 3601 transitions. Word has length 22 [2021-03-10 22:11:53,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:53,887 INFO L480 AbstractCegarLoop]: Abstraction has 1025 states and 3601 transitions. [2021-03-10 22:11:53,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:53,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 3601 transitions. [2021-03-10 22:11:53,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:11:53,888 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:53,888 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:54,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8502,709 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:54,088 INFO L428 AbstractCegarLoop]: === Iteration 710 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:54,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:54,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1792043488, now seen corresponding path program 654 times [2021-03-10 22:11:54,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:54,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023855239] [2021-03-10 22:11:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:54,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023855239] [2021-03-10 22:11:54,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331222500] [2021-03-10 22:11:54,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:54,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:11:54,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:54,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:11:54,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:54,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:54,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:11:54,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424189806] [2021-03-10 22:11:54,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:11:54,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:54,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:11:54,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:11:54,950 INFO L87 Difference]: Start difference. First operand 1025 states and 3601 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:55,590 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-03-10 22:11:55,832 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-03-10 22:11:56,082 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2021-03-10 22:11:56,342 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2021-03-10 22:11:56,607 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-03-10 22:11:56,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:56,641 INFO L93 Difference]: Finished difference Result 1438 states and 4724 transitions. [2021-03-10 22:11:56,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:56,643 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:11:56,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:56,645 INFO L225 Difference]: With dead ends: 1438 [2021-03-10 22:11:56,645 INFO L226 Difference]: Without dead ends: 1426 [2021-03-10 22:11:56,645 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1778.2ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:11:56,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-03-10 22:11:56,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1022. [2021-03-10 22:11:56,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.516160626836435) internal successors, (3590), 1021 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:56,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3590 transitions. [2021-03-10 22:11:56,658 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3590 transitions. Word has length 22 [2021-03-10 22:11:56,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:56,658 INFO L480 AbstractCegarLoop]: Abstraction has 1022 states and 3590 transitions. [2021-03-10 22:11:56,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:56,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3590 transitions. [2021-03-10 22:11:56,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:11:56,660 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:56,660 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:56,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8523,710 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:56,860 INFO L428 AbstractCegarLoop]: === Iteration 711 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:56,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:56,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1996577542, now seen corresponding path program 655 times [2021-03-10 22:11:56,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:56,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673377458] [2021-03-10 22:11:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:57,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673377458] [2021-03-10 22:11:57,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139679716] [2021-03-10 22:11:57,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:57,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:11:57,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:57,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:57,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:11:57,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264708256] [2021-03-10 22:11:57,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:11:57,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:57,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:11:57,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:11:57,732 INFO L87 Difference]: Start difference. First operand 1022 states and 3590 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:58,075 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2021-03-10 22:11:58,575 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-03-10 22:11:58,920 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-03-10 22:11:59,355 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 58 [2021-03-10 22:11:59,668 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-03-10 22:11:59,995 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-03-10 22:12:00,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:00,031 INFO L93 Difference]: Finished difference Result 1435 states and 4713 transitions. [2021-03-10 22:12:00,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:12:00,032 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:00,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:00,034 INFO L225 Difference]: With dead ends: 1435 [2021-03-10 22:12:00,034 INFO L226 Difference]: Without dead ends: 1417 [2021-03-10 22:12:00,034 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2340.6ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:00,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-03-10 22:12:00,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1019. [2021-03-10 22:12:00,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 3.5157170923379173) internal successors, (3579), 1018 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3579 transitions. [2021-03-10 22:12:00,047 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3579 transitions. Word has length 22 [2021-03-10 22:12:00,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:00,047 INFO L480 AbstractCegarLoop]: Abstraction has 1019 states and 3579 transitions. [2021-03-10 22:12:00,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:00,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3579 transitions. [2021-03-10 22:12:00,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:00,048 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:00,048 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:00,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8537,711 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:00,249 INFO L428 AbstractCegarLoop]: === Iteration 712 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:00,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:00,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1258153956, now seen corresponding path program 656 times [2021-03-10 22:12:00,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:00,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127299914] [2021-03-10 22:12:00,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:00,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:00,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127299914] [2021-03-10 22:12:00,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560590049] [2021-03-10 22:12:00,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:00,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:12:00,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:00,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:00,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:01,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:01,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:12:01,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358093408] [2021-03-10 22:12:01,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:12:01,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:01,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:12:01,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:12:01,071 INFO L87 Difference]: Start difference. First operand 1019 states and 3579 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:01,417 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2021-03-10 22:12:01,867 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-03-10 22:12:02,244 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-03-10 22:12:02,541 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2021-03-10 22:12:02,872 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-03-10 22:12:03,211 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2021-03-10 22:12:03,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:03,255 INFO L93 Difference]: Finished difference Result 1426 states and 4689 transitions. [2021-03-10 22:12:03,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:12:03,256 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:03,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:03,258 INFO L225 Difference]: With dead ends: 1426 [2021-03-10 22:12:03,258 INFO L226 Difference]: Without dead ends: 1402 [2021-03-10 22:12:03,258 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2203.3ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:03,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2021-03-10 22:12:03,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1019. [2021-03-10 22:12:03,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 3.512770137524558) internal successors, (3576), 1018 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:03,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3576 transitions. [2021-03-10 22:12:03,271 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3576 transitions. Word has length 22 [2021-03-10 22:12:03,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:03,271 INFO L480 AbstractCegarLoop]: Abstraction has 1019 states and 3576 transitions. [2021-03-10 22:12:03,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:03,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3576 transitions. [2021-03-10 22:12:03,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:03,273 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:03,273 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:03,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 712 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8555 [2021-03-10 22:12:03,473 INFO L428 AbstractCegarLoop]: === Iteration 713 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:03,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:03,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1290765059, now seen corresponding path program 657 times [2021-03-10 22:12:03,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:03,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527576514] [2021-03-10 22:12:03,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:03,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527576514] [2021-03-10 22:12:03,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182951509] [2021-03-10 22:12:03,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:03,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:12:03,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:03,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:03,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:03,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:03,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:03,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:12:03,835 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:03,862 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 22:12:03,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:12:03,863 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 22:12:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:03,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:03,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 22:12:03,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285235311] [2021-03-10 22:12:03,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:12:03,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:03,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:12:03,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:12:03,938 INFO L87 Difference]: Start difference. First operand 1019 states and 3576 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:04,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:04,969 INFO L93 Difference]: Finished difference Result 1447 states and 4836 transitions. [2021-03-10 22:12:04,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:12:04,970 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:04,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:04,972 INFO L225 Difference]: With dead ends: 1447 [2021-03-10 22:12:04,972 INFO L226 Difference]: Without dead ends: 1377 [2021-03-10 22:12:04,973 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 671.2ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:12:04,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2021-03-10 22:12:04,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1012. [2021-03-10 22:12:04,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 3.5084075173095943) internal successors, (3547), 1011 states have internal predecessors, (3547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:04,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 3547 transitions. [2021-03-10 22:12:04,985 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 3547 transitions. Word has length 22 [2021-03-10 22:12:04,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:04,985 INFO L480 AbstractCegarLoop]: Abstraction has 1012 states and 3547 transitions. [2021-03-10 22:12:04,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:04,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 3547 transitions. [2021-03-10 22:12:04,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:04,986 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:04,986 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:05,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8574,713 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:05,187 INFO L428 AbstractCegarLoop]: === Iteration 714 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:05,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:05,187 INFO L82 PathProgramCache]: Analyzing trace with hash -8767304, now seen corresponding path program 658 times [2021-03-10 22:12:05,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:05,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921829499] [2021-03-10 22:12:05,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:05,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:05,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921829499] [2021-03-10 22:12:05,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400010613] [2021-03-10 22:12:05,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:05,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:12:05,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:05,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:05,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:05,919 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_280, v_prenex_282], 1=[v_prenex_284, nondet_0]} [2021-03-10 22:12:05,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:12:05,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:06,025 INFO L628 ElimStorePlain]: treesize reduction 49, result has 52.4 percent of original size [2021-03-10 22:12:06,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:12:06,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:06,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:06,072 INFO L518 ElimStorePlain]: Eliminatee v_prenex_284 vanished before elimination [2021-03-10 22:12:06,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:12:06,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:06,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:06,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:06,083 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:06,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:06,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:12:06,121 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:108, output treesize:6 [2021-03-10 22:12:06,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:06,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:06,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:12:06,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835861412] [2021-03-10 22:12:06,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:12:06,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:06,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:12:06,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:12:06,229 INFO L87 Difference]: Start difference. First operand 1012 states and 3547 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:06,656 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-03-10 22:12:07,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:07,667 INFO L93 Difference]: Finished difference Result 1482 states and 4864 transitions. [2021-03-10 22:12:07,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:12:07,668 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:07,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:07,670 INFO L225 Difference]: With dead ends: 1482 [2021-03-10 22:12:07,670 INFO L226 Difference]: Without dead ends: 1482 [2021-03-10 22:12:07,671 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1241.5ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:07,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-03-10 22:12:07,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1027. [2021-03-10 22:12:07,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 3.4951267056530213) internal successors, (3586), 1026 states have internal predecessors, (3586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:07,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3586 transitions. [2021-03-10 22:12:07,684 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3586 transitions. Word has length 22 [2021-03-10 22:12:07,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:07,684 INFO L480 AbstractCegarLoop]: Abstraction has 1027 states and 3586 transitions. [2021-03-10 22:12:07,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:07,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3586 transitions. [2021-03-10 22:12:07,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:07,685 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:07,686 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:07,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8579,714 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:07,886 INFO L428 AbstractCegarLoop]: === Iteration 715 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:07,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:07,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1149876226, now seen corresponding path program 659 times [2021-03-10 22:12:07,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:07,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449374960] [2021-03-10 22:12:07,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:08,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:08,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449374960] [2021-03-10 22:12:08,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318267530] [2021-03-10 22:12:08,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:08,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:12:08,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:08,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:08,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:08,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:08,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:08,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:08,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:08,560 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:08,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:08,585 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-03-10 22:12:08,585 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:12:08,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:12:08,587 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-03-10 22:12:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:08,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:08,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:12:08,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451499233] [2021-03-10 22:12:08,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:12:08,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:08,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:12:08,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:12:08,718 INFO L87 Difference]: Start difference. First operand 1027 states and 3586 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:09,138 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-03-10 22:12:09,418 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2021-03-10 22:12:10,040 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 22:12:10,215 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-03-10 22:12:10,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:10,320 INFO L93 Difference]: Finished difference Result 1534 states and 4985 transitions. [2021-03-10 22:12:10,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:12:10,321 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:10,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:10,324 INFO L225 Difference]: With dead ends: 1534 [2021-03-10 22:12:10,324 INFO L226 Difference]: Without dead ends: 1534 [2021-03-10 22:12:10,324 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1357.8ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:10,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-03-10 22:12:10,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1030. [2021-03-10 22:12:10,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 3.4956268221574343) internal successors, (3597), 1029 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:10,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 3597 transitions. [2021-03-10 22:12:10,338 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 3597 transitions. Word has length 22 [2021-03-10 22:12:10,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:10,338 INFO L480 AbstractCegarLoop]: Abstraction has 1030 states and 3597 transitions. [2021-03-10 22:12:10,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:10,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 3597 transitions. [2021-03-10 22:12:10,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:10,339 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:10,339 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:10,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8594,715 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:10,543 INFO L428 AbstractCegarLoop]: === Iteration 716 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:10,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:10,543 INFO L82 PathProgramCache]: Analyzing trace with hash -344031496, now seen corresponding path program 660 times [2021-03-10 22:12:10,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:10,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298137563] [2021-03-10 22:12:10,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:10,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298137563] [2021-03-10 22:12:10,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700748805] [2021-03-10 22:12:10,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:10,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:12:10,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:10,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:10,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:11,322 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_294, v_prenex_295], 1=[v_prenex_298, nondet_0]} [2021-03-10 22:12:11,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:12:11,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,433 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-03-10 22:12:11,434 INFO L628 ElimStorePlain]: treesize reduction 49, result has 52.4 percent of original size [2021-03-10 22:12:11,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:12:11,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:11,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:12:11,488 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:11,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:11,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:11,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:11,530 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:12:11,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:12:11,533 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:108, output treesize:6 [2021-03-10 22:12:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:11,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:11,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:12:11,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448135645] [2021-03-10 22:12:11,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:12:11,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:11,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:12:11,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:12:11,646 INFO L87 Difference]: Start difference. First operand 1030 states and 3597 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:12,204 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2021-03-10 22:12:12,759 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 22:12:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:12,987 INFO L93 Difference]: Finished difference Result 1491 states and 4882 transitions. [2021-03-10 22:12:12,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:12:12,989 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:12,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:12,991 INFO L225 Difference]: With dead ends: 1491 [2021-03-10 22:12:12,991 INFO L226 Difference]: Without dead ends: 1485 [2021-03-10 22:12:12,991 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1301.4ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:12,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1485 states. [2021-03-10 22:12:13,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1485 to 1022. [2021-03-10 22:12:13,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.4995102840352597) internal successors, (3573), 1021 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:13,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3573 transitions. [2021-03-10 22:12:13,005 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3573 transitions. Word has length 22 [2021-03-10 22:12:13,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:13,005 INFO L480 AbstractCegarLoop]: Abstraction has 1022 states and 3573 transitions. [2021-03-10 22:12:13,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:13,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3573 transitions. [2021-03-10 22:12:13,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:13,006 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:13,006 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:13,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 716 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8611 [2021-03-10 22:12:13,206 INFO L428 AbstractCegarLoop]: === Iteration 717 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:13,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:13,207 INFO L82 PathProgramCache]: Analyzing trace with hash -2050999482, now seen corresponding path program 661 times [2021-03-10 22:12:13,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:13,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058793433] [2021-03-10 22:12:13,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:13,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058793433] [2021-03-10 22:12:13,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578495113] [2021-03-10 22:12:13,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:13,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:13,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:14,120 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-10 22:12:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:14,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:14,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:12:14,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294053046] [2021-03-10 22:12:14,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:12:14,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:14,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:12:14,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:12:14,287 INFO L87 Difference]: Start difference. First operand 1022 states and 3573 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:14,900 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2021-03-10 22:12:15,481 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2021-03-10 22:12:15,661 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 22:12:15,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:15,932 INFO L93 Difference]: Finished difference Result 1434 states and 4717 transitions. [2021-03-10 22:12:15,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:12:15,933 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:15,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:15,935 INFO L225 Difference]: With dead ends: 1434 [2021-03-10 22:12:15,935 INFO L226 Difference]: Without dead ends: 1434 [2021-03-10 22:12:15,935 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1706.2ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:15,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2021-03-10 22:12:15,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1028. [2021-03-10 22:12:15,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 3.5004868549172348) internal successors, (3595), 1027 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:15,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 3595 transitions. [2021-03-10 22:12:15,954 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 3595 transitions. Word has length 22 [2021-03-10 22:12:15,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:15,955 INFO L480 AbstractCegarLoop]: Abstraction has 1028 states and 3595 transitions. [2021-03-10 22:12:15,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:15,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 3595 transitions. [2021-03-10 22:12:15,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:15,956 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:15,956 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:16,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8627,717 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:16,156 INFO L428 AbstractCegarLoop]: === Iteration 718 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:16,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:16,157 INFO L82 PathProgramCache]: Analyzing trace with hash 750060092, now seen corresponding path program 662 times [2021-03-10 22:12:16,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:16,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359239840] [2021-03-10 22:12:16,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:16,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:16,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359239840] [2021-03-10 22:12:16,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598745018] [2021-03-10 22:12:16,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:16,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:12:16,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:16,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:16,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:17,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:17,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:12:17,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742972077] [2021-03-10 22:12:17,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:12:17,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:17,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:12:17,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:12:17,124 INFO L87 Difference]: Start difference. First operand 1028 states and 3595 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:17,689 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2021-03-10 22:12:18,219 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2021-03-10 22:12:18,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:18,499 INFO L93 Difference]: Finished difference Result 1440 states and 4724 transitions. [2021-03-10 22:12:18,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:12:18,500 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:18,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:18,502 INFO L225 Difference]: With dead ends: 1440 [2021-03-10 22:12:18,502 INFO L226 Difference]: Without dead ends: 1434 [2021-03-10 22:12:18,502 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1425.3ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:18,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2021-03-10 22:12:18,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1025. [2021-03-10 22:12:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 3.5) internal successors, (3584), 1024 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 3584 transitions. [2021-03-10 22:12:18,515 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 3584 transitions. Word has length 22 [2021-03-10 22:12:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:18,515 INFO L480 AbstractCegarLoop]: Abstraction has 1025 states and 3584 transitions. [2021-03-10 22:12:18,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:18,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 3584 transitions. [2021-03-10 22:12:18,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:18,516 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:18,516 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:18,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 718 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8644 [2021-03-10 22:12:18,716 INFO L428 AbstractCegarLoop]: === Iteration 719 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:18,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:18,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1287915670, now seen corresponding path program 663 times [2021-03-10 22:12:18,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:18,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254890274] [2021-03-10 22:12:18,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:18,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254890274] [2021-03-10 22:12:18,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335782882] [2021-03-10 22:12:18,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:19,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:12:19,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:19,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:19,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:19,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:19,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:12:19,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855063689] [2021-03-10 22:12:19,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:12:19,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:19,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:12:19,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:12:19,696 INFO L87 Difference]: Start difference. First operand 1025 states and 3584 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:20,305 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2021-03-10 22:12:20,562 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 32 [2021-03-10 22:12:20,973 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2021-03-10 22:12:21,349 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2021-03-10 22:12:21,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:21,509 INFO L93 Difference]: Finished difference Result 1398 states and 4629 transitions. [2021-03-10 22:12:21,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:12:21,509 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:21,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:21,511 INFO L225 Difference]: With dead ends: 1398 [2021-03-10 22:12:21,512 INFO L226 Difference]: Without dead ends: 1386 [2021-03-10 22:12:21,512 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1874.6ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:21,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-03-10 22:12:21,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1017. [2021-03-10 22:12:21,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 3.5039370078740157) internal successors, (3560), 1016 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:21,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 3560 transitions. [2021-03-10 22:12:21,524 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 3560 transitions. Word has length 22 [2021-03-10 22:12:21,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:21,525 INFO L480 AbstractCegarLoop]: Abstraction has 1017 states and 3560 transitions. [2021-03-10 22:12:21,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:21,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 3560 transitions. [2021-03-10 22:12:21,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:21,526 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:21,526 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:21,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 719 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8663 [2021-03-10 22:12:21,726 INFO L428 AbstractCegarLoop]: === Iteration 720 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:21,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:21,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1801068674, now seen corresponding path program 664 times [2021-03-10 22:12:21,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:21,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920046486] [2021-03-10 22:12:21,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:21,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920046486] [2021-03-10 22:12:21,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869834322] [2021-03-10 22:12:21,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:22,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:12:22,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:22,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:22,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:22,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:22,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:12:22,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377606784] [2021-03-10 22:12:22,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:12:22,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:22,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:12:22,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:12:22,641 INFO L87 Difference]: Start difference. First operand 1017 states and 3560 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:23,536 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2021-03-10 22:12:23,779 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-03-10 22:12:24,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:24,115 INFO L93 Difference]: Finished difference Result 1423 states and 4685 transitions. [2021-03-10 22:12:24,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:12:24,116 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:24,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:24,118 INFO L225 Difference]: With dead ends: 1423 [2021-03-10 22:12:24,118 INFO L226 Difference]: Without dead ends: 1423 [2021-03-10 22:12:24,118 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1517.1ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:24,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-03-10 22:12:24,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1026. [2021-03-10 22:12:24,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1025 states have (on average 3.5053658536585366) internal successors, (3593), 1025 states have internal predecessors, (3593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:24,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 3593 transitions. [2021-03-10 22:12:24,130 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 3593 transitions. Word has length 22 [2021-03-10 22:12:24,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:24,131 INFO L480 AbstractCegarLoop]: Abstraction has 1026 states and 3593 transitions. [2021-03-10 22:12:24,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:24,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 3593 transitions. [2021-03-10 22:12:24,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:24,132 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:24,132 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:24,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8680,720 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:24,332 INFO L428 AbstractCegarLoop]: === Iteration 721 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:24,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:24,332 INFO L82 PathProgramCache]: Analyzing trace with hash 307160952, now seen corresponding path program 665 times [2021-03-10 22:12:24,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:24,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088290843] [2021-03-10 22:12:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:24,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:24,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088290843] [2021-03-10 22:12:24,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083514705] [2021-03-10 22:12:24,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 721 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 721 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:24,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:12:24,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:24,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:24,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:25,068 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-10 22:12:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:25,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:25,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:12:25,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271659985] [2021-03-10 22:12:25,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:12:25,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:25,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:12:25,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:12:25,281 INFO L87 Difference]: Start difference. First operand 1026 states and 3593 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:25,892 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2021-03-10 22:12:26,323 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-03-10 22:12:26,608 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-03-10 22:12:26,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:26,956 INFO L93 Difference]: Finished difference Result 1429 states and 4692 transitions. [2021-03-10 22:12:26,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:12:26,956 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:26,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:26,958 INFO L225 Difference]: With dead ends: 1429 [2021-03-10 22:12:26,958 INFO L226 Difference]: Without dead ends: 1423 [2021-03-10 22:12:26,959 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1693.4ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:26,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-03-10 22:12:26,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1023. [2021-03-10 22:12:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 3.5048923679060664) internal successors, (3582), 1022 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:26,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 3582 transitions. [2021-03-10 22:12:26,972 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 3582 transitions. Word has length 22 [2021-03-10 22:12:26,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:26,972 INFO L480 AbstractCegarLoop]: Abstraction has 1023 states and 3582 transitions. [2021-03-10 22:12:26,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:26,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 3582 transitions. [2021-03-10 22:12:26,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:26,973 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:26,973 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:27,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 721 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8694 [2021-03-10 22:12:27,173 INFO L428 AbstractCegarLoop]: === Iteration 722 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:27,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:27,173 INFO L82 PathProgramCache]: Analyzing trace with hash 845016530, now seen corresponding path program 666 times [2021-03-10 22:12:27,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:27,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791153894] [2021-03-10 22:12:27,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:27,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791153894] [2021-03-10 22:12:27,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293015933] [2021-03-10 22:12:27,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:27,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:12:27,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:27,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:27,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:28,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:28,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:12:28,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585600772] [2021-03-10 22:12:28,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:12:28,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:28,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:12:28,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:12:28,054 INFO L87 Difference]: Start difference. First operand 1023 states and 3582 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:28,682 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2021-03-10 22:12:29,108 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2021-03-10 22:12:29,379 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-03-10 22:12:29,639 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-03-10 22:12:29,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:29,783 INFO L93 Difference]: Finished difference Result 1393 states and 4610 transitions. [2021-03-10 22:12:29,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:12:29,783 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:29,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:29,786 INFO L225 Difference]: With dead ends: 1393 [2021-03-10 22:12:29,786 INFO L226 Difference]: Without dead ends: 1381 [2021-03-10 22:12:29,786 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1707.2ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:29,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-03-10 22:12:29,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1020. [2021-03-10 22:12:29,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 3.50441609421001) internal successors, (3571), 1019 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:29,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 3571 transitions. [2021-03-10 22:12:29,799 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 3571 transitions. Word has length 22 [2021-03-10 22:12:29,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:29,799 INFO L480 AbstractCegarLoop]: Abstraction has 1020 states and 3571 transitions. [2021-03-10 22:12:29,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:29,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 3571 transitions. [2021-03-10 22:12:29,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:29,800 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:29,801 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:30,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8715,722 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:30,001 INFO L428 AbstractCegarLoop]: === Iteration 723 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:30,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:30,001 INFO L82 PathProgramCache]: Analyzing trace with hash 338670264, now seen corresponding path program 667 times [2021-03-10 22:12:30,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:30,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535961587] [2021-03-10 22:12:30,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:30,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535961587] [2021-03-10 22:12:30,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274152692] [2021-03-10 22:12:30,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:30,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:30,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:30,778 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-03-10 22:12:30,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:30,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:30,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:12:30,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375831405] [2021-03-10 22:12:30,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:12:30,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:30,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:12:30,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:12:30,962 INFO L87 Difference]: Start difference. First operand 1020 states and 3571 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:31,545 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2021-03-10 22:12:31,960 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 64 [2021-03-10 22:12:32,334 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2021-03-10 22:12:32,524 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-03-10 22:12:32,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:32,658 INFO L93 Difference]: Finished difference Result 1384 states and 4586 transitions. [2021-03-10 22:12:32,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:12:32,659 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:32,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:32,661 INFO L225 Difference]: With dead ends: 1384 [2021-03-10 22:12:32,661 INFO L226 Difference]: Without dead ends: 1366 [2021-03-10 22:12:32,661 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1740.8ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:32,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-03-10 22:12:32,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1012. [2021-03-10 22:12:32,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 3.5084075173095943) internal successors, (3547), 1011 states have internal predecessors, (3547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:32,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 3547 transitions. [2021-03-10 22:12:32,673 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 3547 transitions. Word has length 22 [2021-03-10 22:12:32,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:32,673 INFO L480 AbstractCegarLoop]: Abstraction has 1012 states and 3547 transitions. [2021-03-10 22:12:32,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:32,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 3547 transitions. [2021-03-10 22:12:32,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:32,674 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:32,674 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:32,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8735,723 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:32,874 INFO L428 AbstractCegarLoop]: === Iteration 724 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:32,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:32,875 INFO L82 PathProgramCache]: Analyzing trace with hash 184852519, now seen corresponding path program 668 times [2021-03-10 22:12:32,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:32,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098152760] [2021-03-10 22:12:32,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:32,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098152760] [2021-03-10 22:12:32,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619055040] [2021-03-10 22:12:32,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:33,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:12:33,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:33,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:33,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:33,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:33,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:33,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:12:33,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:33,277 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-03-10 22:12:33,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:12:33,278 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-03-10 22:12:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:33,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:33,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 22:12:33,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812546898] [2021-03-10 22:12:33,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:12:33,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:33,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:12:33,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:12:33,361 INFO L87 Difference]: Start difference. First operand 1012 states and 3547 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:34,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:34,053 INFO L93 Difference]: Finished difference Result 1438 states and 4796 transitions. [2021-03-10 22:12:34,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:12:34,054 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:34,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:34,056 INFO L225 Difference]: With dead ends: 1438 [2021-03-10 22:12:34,056 INFO L226 Difference]: Without dead ends: 1368 [2021-03-10 22:12:34,056 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 468.7ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:12:34,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2021-03-10 22:12:34,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1019. [2021-03-10 22:12:34,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 3.512770137524558) internal successors, (3576), 1018 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:34,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3576 transitions. [2021-03-10 22:12:34,069 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3576 transitions. Word has length 22 [2021-03-10 22:12:34,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:34,069 INFO L480 AbstractCegarLoop]: Abstraction has 1019 states and 3576 transitions. [2021-03-10 22:12:34,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:34,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3576 transitions. [2021-03-10 22:12:34,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:34,070 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:34,070 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:34,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 724 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8753 [2021-03-10 22:12:34,270 INFO L428 AbstractCegarLoop]: === Iteration 725 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:34,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:34,271 INFO L82 PathProgramCache]: Analyzing trace with hash -407865598, now seen corresponding path program 669 times [2021-03-10 22:12:34,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:34,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666218996] [2021-03-10 22:12:34,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:34,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:34,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666218996] [2021-03-10 22:12:34,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690405772] [2021-03-10 22:12:34,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:34,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:12:34,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:34,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:34,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:35,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:35,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-03-10 22:12:35,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:35,062 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-03-10 22:12:35,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:35,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:35,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:35,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:35,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:12:35,075 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-03-10 22:12:35,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:35,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:35,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:12:35,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848351347] [2021-03-10 22:12:35,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:12:35,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:35,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:12:35,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:12:35,157 INFO L87 Difference]: Start difference. First operand 1019 states and 3576 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:35,513 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-03-10 22:12:35,736 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-03-10 22:12:36,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:36,467 INFO L93 Difference]: Finished difference Result 1484 states and 4880 transitions. [2021-03-10 22:12:36,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:12:36,468 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:36,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:36,470 INFO L225 Difference]: With dead ends: 1484 [2021-03-10 22:12:36,470 INFO L226 Difference]: Without dead ends: 1484 [2021-03-10 22:12:36,470 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1255.3ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:36,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2021-03-10 22:12:36,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1029. [2021-03-10 22:12:36,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 3.5038910505836576) internal successors, (3602), 1028 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:36,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3602 transitions. [2021-03-10 22:12:36,484 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3602 transitions. Word has length 22 [2021-03-10 22:12:36,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:36,484 INFO L480 AbstractCegarLoop]: Abstraction has 1029 states and 3602 transitions. [2021-03-10 22:12:36,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:36,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3602 transitions. [2021-03-10 22:12:36,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:36,485 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:36,485 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:36,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8758,725 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:36,686 INFO L428 AbstractCegarLoop]: === Iteration 726 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:36,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:36,686 INFO L82 PathProgramCache]: Analyzing trace with hash 750777932, now seen corresponding path program 670 times [2021-03-10 22:12:36,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:36,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628924815] [2021-03-10 22:12:36,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:36,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628924815] [2021-03-10 22:12:36,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920315665] [2021-03-10 22:12:36,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:37,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:12:37,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:37,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:37,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:37,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:37,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:37,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:37,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:37,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:37,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:37,446 INFO L628 ElimStorePlain]: treesize reduction 46, result has 22.0 percent of original size [2021-03-10 22:12:37,446 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:12:37,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:12:37,447 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:84, output treesize:6 [2021-03-10 22:12:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:37,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:37,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:12:37,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536298639] [2021-03-10 22:12:37,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:12:37,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:37,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:12:37,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:12:37,527 INFO L87 Difference]: Start difference. First operand 1029 states and 3602 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:38,246 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-03-10 22:12:38,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:38,759 INFO L93 Difference]: Finished difference Result 1536 states and 5001 transitions. [2021-03-10 22:12:38,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:12:38,760 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:38,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:38,762 INFO L225 Difference]: With dead ends: 1536 [2021-03-10 22:12:38,762 INFO L226 Difference]: Without dead ends: 1536 [2021-03-10 22:12:38,762 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1202.1ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:38,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-03-10 22:12:38,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1032. [2021-03-10 22:12:38,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 3.504364694471387) internal successors, (3613), 1031 states have internal predecessors, (3613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:38,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 3613 transitions. [2021-03-10 22:12:38,782 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 3613 transitions. Word has length 22 [2021-03-10 22:12:38,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:38,782 INFO L480 AbstractCegarLoop]: Abstraction has 1032 states and 3613 transitions. [2021-03-10 22:12:38,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:38,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 3613 transitions. [2021-03-10 22:12:38,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:38,783 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:38,783 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:38,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 726 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8775 [2021-03-10 22:12:38,984 INFO L428 AbstractCegarLoop]: === Iteration 727 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:38,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:38,984 INFO L82 PathProgramCache]: Analyzing trace with hash -743129790, now seen corresponding path program 671 times [2021-03-10 22:12:38,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:38,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350273959] [2021-03-10 22:12:38,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:39,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:39,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350273959] [2021-03-10 22:12:39,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449573836] [2021-03-10 22:12:39,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:39,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:12:39,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:39,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:39,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:39,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:39,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-03-10 22:12:39,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:39,741 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-03-10 22:12:39,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:39,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:39,745 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:39,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:39,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:12:39,753 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-03-10 22:12:39,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:39,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:39,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:12:39,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885013599] [2021-03-10 22:12:39,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:12:39,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:39,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:12:39,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:12:39,828 INFO L87 Difference]: Start difference. First operand 1032 states and 3613 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:41,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:41,014 INFO L93 Difference]: Finished difference Result 1493 states and 4898 transitions. [2021-03-10 22:12:41,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:12:41,015 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:41,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:41,017 INFO L225 Difference]: With dead ends: 1493 [2021-03-10 22:12:41,017 INFO L226 Difference]: Without dead ends: 1487 [2021-03-10 22:12:41,017 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1142.3ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:41,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-03-10 22:12:41,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1024. [2021-03-10 22:12:41,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 3.5083088954056696) internal successors, (3589), 1023 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:41,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 3589 transitions. [2021-03-10 22:12:41,031 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 3589 transitions. Word has length 22 [2021-03-10 22:12:41,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:41,031 INFO L480 AbstractCegarLoop]: Abstraction has 1024 states and 3589 transitions. [2021-03-10 22:12:41,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:41,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 3589 transitions. [2021-03-10 22:12:41,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:41,032 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:41,032 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:41,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8791,727 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:41,232 INFO L428 AbstractCegarLoop]: === Iteration 728 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:41,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:41,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1844869520, now seen corresponding path program 672 times [2021-03-10 22:12:41,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:41,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573859790] [2021-03-10 22:12:41,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:41,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:41,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573859790] [2021-03-10 22:12:41,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956424531] [2021-03-10 22:12:41,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:41,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:12:41,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:41,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:41,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:42,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:42,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:12:42,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978980066] [2021-03-10 22:12:42,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:12:42,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:42,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:12:42,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:12:42,188 INFO L87 Difference]: Start difference. First operand 1024 states and 3589 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:43,184 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-03-10 22:12:43,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:43,520 INFO L93 Difference]: Finished difference Result 1436 states and 4733 transitions. [2021-03-10 22:12:43,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:12:43,521 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:43,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:43,523 INFO L225 Difference]: With dead ends: 1436 [2021-03-10 22:12:43,523 INFO L226 Difference]: Without dead ends: 1436 [2021-03-10 22:12:43,523 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1384.2ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:43,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2021-03-10 22:12:43,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1030. [2021-03-10 22:12:43,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 3.509232264334305) internal successors, (3611), 1029 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:43,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 3611 transitions. [2021-03-10 22:12:43,536 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 3611 transitions. Word has length 22 [2021-03-10 22:12:43,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:43,536 INFO L480 AbstractCegarLoop]: Abstraction has 1030 states and 3611 transitions. [2021-03-10 22:12:43,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:43,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 3611 transitions. [2021-03-10 22:12:43,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:43,537 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:43,537 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:43,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 728 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8808 [2021-03-10 22:12:43,737 INFO L428 AbstractCegarLoop]: === Iteration 729 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:43,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:43,737 INFO L82 PathProgramCache]: Analyzing trace with hash 350961798, now seen corresponding path program 673 times [2021-03-10 22:12:43,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:43,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476320331] [2021-03-10 22:12:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:43,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476320331] [2021-03-10 22:12:43,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190349884] [2021-03-10 22:12:43,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 729 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 729 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:44,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:44,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:44,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:44,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:12:44,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093307571] [2021-03-10 22:12:44,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:12:44,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:44,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:12:44,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:12:44,669 INFO L87 Difference]: Start difference. First operand 1030 states and 3611 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:45,829 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 69 [2021-03-10 22:12:46,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:46,177 INFO L93 Difference]: Finished difference Result 1442 states and 4740 transitions. [2021-03-10 22:12:46,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:12:46,178 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:46,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:46,180 INFO L225 Difference]: With dead ends: 1442 [2021-03-10 22:12:46,180 INFO L226 Difference]: Without dead ends: 1436 [2021-03-10 22:12:46,180 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1482.4ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:46,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2021-03-10 22:12:46,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1027. [2021-03-10 22:12:46,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 3.508771929824561) internal successors, (3600), 1026 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:46,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3600 transitions. [2021-03-10 22:12:46,193 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3600 transitions. Word has length 22 [2021-03-10 22:12:46,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:46,193 INFO L480 AbstractCegarLoop]: Abstraction has 1027 states and 3600 transitions. [2021-03-10 22:12:46,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:46,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3600 transitions. [2021-03-10 22:12:46,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:46,194 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:46,194 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:46,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8825,729 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:46,394 INFO L428 AbstractCegarLoop]: === Iteration 730 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:46,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:46,395 INFO L82 PathProgramCache]: Analyzing trace with hash 888817376, now seen corresponding path program 674 times [2021-03-10 22:12:46,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:46,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458357903] [2021-03-10 22:12:46,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:46,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458357903] [2021-03-10 22:12:46,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847706389] [2021-03-10 22:12:46,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:46,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:12:46,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:46,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:46,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:47,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:47,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:12:47,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206968425] [2021-03-10 22:12:47,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:12:47,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:47,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:12:47,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:12:47,335 INFO L87 Difference]: Start difference. First operand 1027 states and 3600 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:48,150 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2021-03-10 22:12:48,599 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 69 [2021-03-10 22:12:48,959 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 59 [2021-03-10 22:12:49,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:49,119 INFO L93 Difference]: Finished difference Result 1400 states and 4645 transitions. [2021-03-10 22:12:49,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:12:49,120 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:49,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:49,122 INFO L225 Difference]: With dead ends: 1400 [2021-03-10 22:12:49,122 INFO L226 Difference]: Without dead ends: 1388 [2021-03-10 22:12:49,122 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1811.4ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:49,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-03-10 22:12:49,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1019. [2021-03-10 22:12:49,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 3.512770137524558) internal successors, (3576), 1018 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:49,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3576 transitions. [2021-03-10 22:12:49,134 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3576 transitions. Word has length 22 [2021-03-10 22:12:49,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:49,134 INFO L480 AbstractCegarLoop]: Abstraction has 1019 states and 3576 transitions. [2021-03-10 22:12:49,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:49,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3576 transitions. [2021-03-10 22:12:49,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:49,135 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:49,135 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:49,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 730 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8841 [2021-03-10 22:12:49,336 INFO L428 AbstractCegarLoop]: === Iteration 731 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:49,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:49,336 INFO L82 PathProgramCache]: Analyzing trace with hash -875925571, now seen corresponding path program 675 times [2021-03-10 22:12:49,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:49,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460332765] [2021-03-10 22:12:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:49,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460332765] [2021-03-10 22:12:49,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464933868] [2021-03-10 22:12:49,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 731 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 731 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:49,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:12:49,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:49,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:49,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:49,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:12:49,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:49,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:49,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:49,772 INFO L628 ElimStorePlain]: treesize reduction 15, result has 57.1 percent of original size [2021-03-10 22:12:49,772 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:12:49,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:12:49,773 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:54, output treesize:20 [2021-03-10 22:12:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:49,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:49,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 22:12:49,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037835463] [2021-03-10 22:12:49,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:12:49,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:49,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:12:49,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:12:49,902 INFO L87 Difference]: Start difference. First operand 1019 states and 3576 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:50,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:50,914 INFO L93 Difference]: Finished difference Result 1541 states and 5047 transitions. [2021-03-10 22:12:50,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:12:50,915 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:50,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:50,917 INFO L225 Difference]: With dead ends: 1541 [2021-03-10 22:12:50,917 INFO L226 Difference]: Without dead ends: 1471 [2021-03-10 22:12:50,917 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 678.7ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:12:50,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2021-03-10 22:12:50,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1026. [2021-03-10 22:12:50,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1025 states have (on average 3.5239024390243903) internal successors, (3612), 1025 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:50,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 3612 transitions. [2021-03-10 22:12:50,930 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 3612 transitions. Word has length 22 [2021-03-10 22:12:50,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:50,930 INFO L480 AbstractCegarLoop]: Abstraction has 1026 states and 3612 transitions. [2021-03-10 22:12:50,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:50,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 3612 transitions. [2021-03-10 22:12:50,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:50,931 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:50,931 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:51,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8857,731 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:51,132 INFO L428 AbstractCegarLoop]: === Iteration 732 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:51,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:51,132 INFO L82 PathProgramCache]: Analyzing trace with hash 133449592, now seen corresponding path program 676 times [2021-03-10 22:12:51,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:51,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371017001] [2021-03-10 22:12:51,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:51,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371017001] [2021-03-10 22:12:51,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783145378] [2021-03-10 22:12:51,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 732 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 732 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:51,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:12:51,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:51,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:51,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:51,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:51,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-03-10 22:12:51,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:51,890 INFO L628 ElimStorePlain]: treesize reduction 21, result has 78.4 percent of original size [2021-03-10 22:12:51,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:51,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:51,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:51,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:51,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:12:51,943 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:51,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:51,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:12:51,949 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:52,002 INFO L628 ElimStorePlain]: treesize reduction 13, result has 74.5 percent of original size [2021-03-10 22:12:52,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:12:52,004 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-03-10 22:12:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:52,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:52,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:12:52,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413127611] [2021-03-10 22:12:52,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:12:52,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:52,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:12:52,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:12:52,139 INFO L87 Difference]: Start difference. First operand 1026 states and 3612 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:53,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:53,254 INFO L93 Difference]: Finished difference Result 1650 states and 5369 transitions. [2021-03-10 22:12:53,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:12:53,255 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:53,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:53,258 INFO L225 Difference]: With dead ends: 1650 [2021-03-10 22:12:53,258 INFO L226 Difference]: Without dead ends: 1650 [2021-03-10 22:12:53,258 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1101.7ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:53,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-03-10 22:12:53,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1038. [2021-03-10 22:12:53,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 3.522661523625844) internal successors, (3653), 1037 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:53,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3653 transitions. [2021-03-10 22:12:53,273 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3653 transitions. Word has length 22 [2021-03-10 22:12:53,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:53,273 INFO L480 AbstractCegarLoop]: Abstraction has 1038 states and 3653 transitions. [2021-03-10 22:12:53,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:53,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3653 transitions. [2021-03-10 22:12:53,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:53,274 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:53,274 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:53,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 732 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8864 [2021-03-10 22:12:53,474 INFO L428 AbstractCegarLoop]: === Iteration 733 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:53,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:53,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1292093122, now seen corresponding path program 677 times [2021-03-10 22:12:53,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:53,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998431654] [2021-03-10 22:12:53,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:53,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998431654] [2021-03-10 22:12:53,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087043655] [2021-03-10 22:12:53,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 733 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 733 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:53,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:12:53,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:53,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:53,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:54,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:12:54,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,142 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:54,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,210 INFO L628 ElimStorePlain]: treesize reduction 46, result has 49.5 percent of original size [2021-03-10 22:12:54,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:54,215 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:54,241 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:12:54,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:12:54,242 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-03-10 22:12:54,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:54,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:54,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:12:54,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56789937] [2021-03-10 22:12:54,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:12:54,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:54,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:12:54,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:12:54,386 INFO L87 Difference]: Start difference. First operand 1038 states and 3653 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:55,032 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-03-10 22:12:55,415 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-03-10 22:12:55,583 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-10 22:12:55,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:55,677 INFO L93 Difference]: Finished difference Result 1682 states and 5428 transitions. [2021-03-10 22:12:55,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:12:55,678 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:55,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:55,681 INFO L225 Difference]: With dead ends: 1682 [2021-03-10 22:12:55,681 INFO L226 Difference]: Without dead ends: 1682 [2021-03-10 22:12:55,681 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1233.1ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:55,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-03-10 22:12:55,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1044. [2021-03-10 22:12:55,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.526366251198466) internal successors, (3678), 1043 states have internal predecessors, (3678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:55,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3678 transitions. [2021-03-10 22:12:55,697 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3678 transitions. Word has length 22 [2021-03-10 22:12:55,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:55,697 INFO L480 AbstractCegarLoop]: Abstraction has 1044 states and 3678 transitions. [2021-03-10 22:12:55,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:55,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3678 transitions. [2021-03-10 22:12:55,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:55,698 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:55,698 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:55,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 733 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8884 [2021-03-10 22:12:55,899 INFO L428 AbstractCegarLoop]: === Iteration 734 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:55,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:55,899 INFO L82 PathProgramCache]: Analyzing trace with hash -201814600, now seen corresponding path program 678 times [2021-03-10 22:12:55,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:55,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193282067] [2021-03-10 22:12:55,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:55,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:56,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:56,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193282067] [2021-03-10 22:12:56,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870098677] [2021-03-10 22:12:56,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 734 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 734 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:56,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:12:56,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:56,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:56,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:56,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:56,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:56,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:12:56,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:56,604 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:56,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:56,672 INFO L628 ElimStorePlain]: treesize reduction 46, result has 49.5 percent of original size [2021-03-10 22:12:56,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:56,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:56,677 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:56,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:56,712 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:12:56,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:12:56,714 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-03-10 22:12:56,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:56,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:56,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:12:56,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635616969] [2021-03-10 22:12:56,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:12:56,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:56,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:12:56,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:12:56,859 INFO L87 Difference]: Start difference. First operand 1044 states and 3678 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:58,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:58,031 INFO L93 Difference]: Finished difference Result 1639 states and 5319 transitions. [2021-03-10 22:12:58,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:12:58,032 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:58,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:58,034 INFO L225 Difference]: With dead ends: 1639 [2021-03-10 22:12:58,034 INFO L226 Difference]: Without dead ends: 1633 [2021-03-10 22:12:58,034 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1182.6ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:58,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2021-03-10 22:12:58,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1036. [2021-03-10 22:12:58,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 3.5304347826086957) internal successors, (3654), 1035 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:58,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3654 transitions. [2021-03-10 22:12:58,048 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3654 transitions. Word has length 22 [2021-03-10 22:12:58,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:58,048 INFO L480 AbstractCegarLoop]: Abstraction has 1036 states and 3654 transitions. [2021-03-10 22:12:58,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:58,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3654 transitions. [2021-03-10 22:12:58,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:58,050 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:58,050 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:58,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 734 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8909 [2021-03-10 22:12:58,250 INFO L428 AbstractCegarLoop]: === Iteration 735 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:58,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:58,250 INFO L82 PathProgramCache]: Analyzing trace with hash 543962077, now seen corresponding path program 679 times [2021-03-10 22:12:58,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:58,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560695247] [2021-03-10 22:12:58,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:58,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560695247] [2021-03-10 22:12:58,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853069518] [2021-03-10 22:12:58,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 735 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 735 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:58,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:12:58,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:58,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:12:58,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:58,595 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:58,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:58,632 INFO L628 ElimStorePlain]: treesize reduction 2, result has 93.1 percent of original size [2021-03-10 22:12:58,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:12:58,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:58,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:58,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:12:58,653 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:54, output treesize:20 [2021-03-10 22:12:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:58,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:58,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-10 22:12:58,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491776917] [2021-03-10 22:12:58,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:12:58,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:58,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:12:58,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:12:58,758 INFO L87 Difference]: Start difference. First operand 1036 states and 3654 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:59,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:59,837 INFO L93 Difference]: Finished difference Result 1553 states and 5061 transitions. [2021-03-10 22:12:59,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:12:59,838 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:12:59,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:59,840 INFO L225 Difference]: With dead ends: 1553 [2021-03-10 22:12:59,840 INFO L226 Difference]: Without dead ends: 1469 [2021-03-10 22:12:59,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 745.7ms TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:12:59,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2021-03-10 22:12:59,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1016. [2021-03-10 22:12:59,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 3.50935960591133) internal successors, (3562), 1015 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:59,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 3562 transitions. [2021-03-10 22:12:59,853 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 3562 transitions. Word has length 22 [2021-03-10 22:12:59,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:59,853 INFO L480 AbstractCegarLoop]: Abstraction has 1016 states and 3562 transitions. [2021-03-10 22:12:59,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:59,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 3562 transitions. [2021-03-10 22:12:59,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:12:59,855 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:59,855 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:00,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 735 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8930 [2021-03-10 22:13:00,055 INFO L428 AbstractCegarLoop]: === Iteration 736 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:00,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:00,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1952026690, now seen corresponding path program 680 times [2021-03-10 22:13:00,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:00,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204155059] [2021-03-10 22:13:00,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:00,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204155059] [2021-03-10 22:13:00,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036561526] [2021-03-10 22:13:00,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 736 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 736 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:00,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:13:00,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:00,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:13:00,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:00,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:00,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:00,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2021-03-10 22:13:00,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:00,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:13:00,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:00,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:00,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:13:00,931 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:00,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:00,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:13:00,938 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:01,060 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-10 22:13:01,060 INFO L628 ElimStorePlain]: treesize reduction 15, result has 82.8 percent of original size [2021-03-10 22:13:01,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:01,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:01,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:13:01,067 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:01,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:13:01,073 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:01,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:01,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:13:01,120 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:144, output treesize:22 [2021-03-10 22:13:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:01,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:01,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:13:01,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216243633] [2021-03-10 22:13:01,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:13:01,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:01,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:13:01,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:13:01,283 INFO L87 Difference]: Start difference. First operand 1016 states and 3562 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:02,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:02,549 INFO L93 Difference]: Finished difference Result 1573 states and 5152 transitions. [2021-03-10 22:13:02,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:13:02,551 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:13:02,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:02,553 INFO L225 Difference]: With dead ends: 1573 [2021-03-10 22:13:02,553 INFO L226 Difference]: Without dead ends: 1573 [2021-03-10 22:13:02,553 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1271.5ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:13:02,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2021-03-10 22:13:02,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 1012. [2021-03-10 22:13:02,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 3.5054401582591495) internal successors, (3544), 1011 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:02,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 3544 transitions. [2021-03-10 22:13:02,567 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 3544 transitions. Word has length 22 [2021-03-10 22:13:02,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:02,567 INFO L480 AbstractCegarLoop]: Abstraction has 1012 states and 3544 transitions. [2021-03-10 22:13:02,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:02,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 3544 transitions. [2021-03-10 22:13:02,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:13:02,568 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:02,568 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:02,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 736 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8939 [2021-03-10 22:13:02,768 INFO L428 AbstractCegarLoop]: === Iteration 737 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:02,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:02,768 INFO L82 PathProgramCache]: Analyzing trace with hash -709889214, now seen corresponding path program 681 times [2021-03-10 22:13:02,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:02,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847058843] [2021-03-10 22:13:02,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:02,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:02,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847058843] [2021-03-10 22:13:02,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146733651] [2021-03-10 22:13:02,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 737 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 737 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:03,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:13:03,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:03,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 22:13:03,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:03,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:13:03,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:03,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:03,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:13:03,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:03,640 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 22:13:03,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:03,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:03,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:03,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-10 22:13:03,648 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:03,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:13:03,654 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:03,763 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 22:13:03,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:03,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:03,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:03,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-03-10 22:13:03,771 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:03,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:03,775 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:03,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:03,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:13:03,857 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:174, output treesize:61 [2021-03-10 22:13:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:04,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:04,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-03-10 22:13:04,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453752436] [2021-03-10 22:13:04,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:13:04,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:04,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:13:04,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:13:04,160 INFO L87 Difference]: Start difference. First operand 1012 states and 3544 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:05,032 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-03-10 22:13:05,268 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-10 22:13:05,601 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-03-10 22:13:05,964 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-03-10 22:13:06,192 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-03-10 22:13:06,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:06,244 INFO L93 Difference]: Finished difference Result 1541 states and 5061 transitions. [2021-03-10 22:13:06,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:13:06,245 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:13:06,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:06,247 INFO L225 Difference]: With dead ends: 1541 [2021-03-10 22:13:06,247 INFO L226 Difference]: Without dead ends: 1520 [2021-03-10 22:13:06,247 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2038.4ms TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:13:06,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-03-10 22:13:06,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1013. [2021-03-10 22:13:06,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 3.507905138339921) internal successors, (3550), 1012 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:06,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3550 transitions. [2021-03-10 22:13:06,261 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3550 transitions. Word has length 22 [2021-03-10 22:13:06,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:06,261 INFO L480 AbstractCegarLoop]: Abstraction has 1013 states and 3550 transitions. [2021-03-10 22:13:06,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:06,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3550 transitions. [2021-03-10 22:13:06,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:13:06,262 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:06,262 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:06,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8959,737 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:06,462 INFO L428 AbstractCegarLoop]: === Iteration 738 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:06,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:06,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1627941126, now seen corresponding path program 682 times [2021-03-10 22:13:06,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:06,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763988287] [2021-03-10 22:13:06,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:06,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763988287] [2021-03-10 22:13:06,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940809013] [2021-03-10 22:13:06,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 738 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 738 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:06,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:13:06,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:06,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:13:06,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:07,233 INFO L446 ElimStorePlain]: Different costs {0=[nondet_0, v_prenex_402, v_prenex_403], 1=[v_prenex_404, v_prenex_407, v_prenex_409]} [2021-03-10 22:13:07,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:13:07,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:07,458 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-03-10 22:13:07,458 INFO L628 ElimStorePlain]: treesize reduction 61, result has 70.5 percent of original size [2021-03-10 22:13:07,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:13:07,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:07,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:07,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:13:07,568 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:07,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:07,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:13:07,669 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:07,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:07,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:13:07,675 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:07,825 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-03-10 22:13:07,826 INFO L628 ElimStorePlain]: treesize reduction 15, result has 87.1 percent of original size [2021-03-10 22:13:07,826 INFO L518 ElimStorePlain]: Eliminatee v_prenex_407 vanished before elimination [2021-03-10 22:13:07,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:13:07,832 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:07,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:07,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:13:07,838 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:07,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:07,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:13:07,906 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:212, output treesize:29 [2021-03-10 22:13:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:08,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:08,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:13:08,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295478241] [2021-03-10 22:13:08,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:13:08,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:08,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:13:08,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:13:08,080 INFO L87 Difference]: Start difference. First operand 1013 states and 3550 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:09,176 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-10 22:13:09,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:09,349 INFO L93 Difference]: Finished difference Result 1487 states and 4931 transitions. [2021-03-10 22:13:09,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:13:09,350 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:13:09,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:09,352 INFO L225 Difference]: With dead ends: 1487 [2021-03-10 22:13:09,352 INFO L226 Difference]: Without dead ends: 1487 [2021-03-10 22:13:09,353 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1243.7ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:13:09,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-03-10 22:13:09,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1006. [2021-03-10 22:13:09,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 3.5024875621890548) internal successors, (3520), 1005 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:09,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3520 transitions. [2021-03-10 22:13:09,365 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3520 transitions. Word has length 22 [2021-03-10 22:13:09,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:09,366 INFO L480 AbstractCegarLoop]: Abstraction has 1006 states and 3520 transitions. [2021-03-10 22:13:09,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:09,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3520 transitions. [2021-03-10 22:13:09,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:13:09,367 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:09,367 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:09,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8978,738 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:09,567 INFO L428 AbstractCegarLoop]: === Iteration 739 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:09,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:09,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1378076080, now seen corresponding path program 683 times [2021-03-10 22:13:09,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:09,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984440386] [2021-03-10 22:13:09,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:09,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984440386] [2021-03-10 22:13:09,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618624370] [2021-03-10 22:13:09,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 739 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 739 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:09,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:13:09,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:09,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:13:09,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:10,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:10,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:10,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:13:10,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:10,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:10,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:10,348 INFO L628 ElimStorePlain]: treesize reduction 46, result has 49.5 percent of original size [2021-03-10 22:13:10,348 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:13:10,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:10,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:13:10,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:10,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:10,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:13:10,381 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-03-10 22:13:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:10,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:10,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:13:10,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752998369] [2021-03-10 22:13:10,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:13:10,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:10,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:13:10,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:13:10,552 INFO L87 Difference]: Start difference. First operand 1006 states and 3520 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:11,520 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-03-10 22:13:11,708 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-03-10 22:13:11,888 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-03-10 22:13:11,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:11,968 INFO L93 Difference]: Finished difference Result 1597 states and 5215 transitions. [2021-03-10 22:13:11,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:13:11,969 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:13:11,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:11,972 INFO L225 Difference]: With dead ends: 1597 [2021-03-10 22:13:11,972 INFO L226 Difference]: Without dead ends: 1597 [2021-03-10 22:13:11,972 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1295.1ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:13:11,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-03-10 22:13:11,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1014. [2021-03-10 22:13:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 3.510365251727542) internal successors, (3556), 1013 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:11,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 3556 transitions. [2021-03-10 22:13:11,986 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 3556 transitions. Word has length 22 [2021-03-10 22:13:11,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:11,986 INFO L480 AbstractCegarLoop]: Abstraction has 1014 states and 3556 transitions. [2021-03-10 22:13:11,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:11,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 3556 transitions. [2021-03-10 22:13:11,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:13:11,987 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:11,987 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:12,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 739 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8995 [2021-03-10 22:13:12,188 INFO L428 AbstractCegarLoop]: === Iteration 740 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:12,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:12,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1422983494, now seen corresponding path program 684 times [2021-03-10 22:13:12,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:12,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762875549] [2021-03-10 22:13:12,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:12,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762875549] [2021-03-10 22:13:12,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814952477] [2021-03-10 22:13:12,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 740 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 740 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:12,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:13:12,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:12,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:13:12,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:12,909 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_420, v_prenex_422], 1=[nondet_0, v_prenex_423, v_prenex_425]} [2021-03-10 22:13:12,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:12,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:13,057 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-03-10 22:13:13,058 INFO L628 ElimStorePlain]: treesize reduction 72, result has 56.9 percent of original size [2021-03-10 22:13:13,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:13:13,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:13,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:13,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:13:13,136 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:13,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:13,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:13:13,141 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:13,223 INFO L628 ElimStorePlain]: treesize reduction 13, result has 81.7 percent of original size [2021-03-10 22:13:13,223 INFO L518 ElimStorePlain]: Eliminatee v_prenex_423 vanished before elimination [2021-03-10 22:13:13,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:13,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:13:13,228 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:13,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:13,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:13:13,265 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:186, output treesize:27 [2021-03-10 22:13:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:13,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:13,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:13:13,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001014709] [2021-03-10 22:13:13,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:13:13,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:13,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:13:13,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:13:13,424 INFO L87 Difference]: Start difference. First operand 1014 states and 3556 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:14,310 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-03-10 22:13:14,488 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-03-10 22:13:14,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:14,700 INFO L93 Difference]: Finished difference Result 1583 states and 5164 transitions. [2021-03-10 22:13:14,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:13:14,701 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:13:14,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:14,704 INFO L225 Difference]: With dead ends: 1583 [2021-03-10 22:13:14,704 INFO L226 Difference]: Without dead ends: 1577 [2021-03-10 22:13:14,704 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1273.1ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:13:14,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2021-03-10 22:13:14,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1011. [2021-03-10 22:13:14,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 3.50990099009901) internal successors, (3545), 1010 states have internal predecessors, (3545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:14,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 3545 transitions. [2021-03-10 22:13:14,717 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 3545 transitions. Word has length 22 [2021-03-10 22:13:14,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:14,717 INFO L480 AbstractCegarLoop]: Abstraction has 1011 states and 3545 transitions. [2021-03-10 22:13:14,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:14,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 3545 transitions. [2021-03-10 22:13:14,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:13:14,719 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:14,719 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:14,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 740 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9016 [2021-03-10 22:13:14,919 INFO L428 AbstractCegarLoop]: === Iteration 741 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:14,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:14,919 INFO L82 PathProgramCache]: Analyzing trace with hash -626675642, now seen corresponding path program 685 times [2021-03-10 22:13:14,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:14,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39359545] [2021-03-10 22:13:14,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:14,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:15,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39359545] [2021-03-10 22:13:15,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016765940] [2021-03-10 22:13:15,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 741 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 741 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:15,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:13:15,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:15,634 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_430, v_prenex_431, v_prenex_436], 1=[v_prenex_432, v_prenex_433, nondet_0]} [2021-03-10 22:13:15,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:13:15,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:15,855 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-03-10 22:13:15,855 INFO L628 ElimStorePlain]: treesize reduction 61, result has 70.4 percent of original size [2021-03-10 22:13:15,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:13:15,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:15,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:15,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:13:15,955 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:16,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:16,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:16,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:16,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:13:16,045 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:16,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:16,049 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:16,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:16,124 INFO L518 ElimStorePlain]: Eliminatee v_prenex_433 vanished before elimination [2021-03-10 22:13:16,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:16,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:16,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:13:16,131 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:16,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:13:16,137 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:16,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:16,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:13:16,205 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:212, output treesize:29 [2021-03-10 22:13:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:16,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:16,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:13:16,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279105020] [2021-03-10 22:13:16,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:13:16,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:16,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:13:16,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:13:16,389 INFO L87 Difference]: Start difference. First operand 1011 states and 3545 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:17,407 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-03-10 22:13:17,617 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-10 22:13:17,853 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-03-10 22:13:18,021 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-03-10 22:13:18,242 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2021-03-10 22:13:18,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:18,303 INFO L93 Difference]: Finished difference Result 1626 states and 5277 transitions. [2021-03-10 22:13:18,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:13:18,304 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:13:18,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:18,306 INFO L225 Difference]: With dead ends: 1626 [2021-03-10 22:13:18,306 INFO L226 Difference]: Without dead ends: 1605 [2021-03-10 22:13:18,306 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1682.1ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:13:18,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-03-10 22:13:18,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1007. [2021-03-10 22:13:18,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 3.503976143141153) internal successors, (3525), 1006 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:18,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 3525 transitions. [2021-03-10 22:13:18,319 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 3525 transitions. Word has length 22 [2021-03-10 22:13:18,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:18,319 INFO L480 AbstractCegarLoop]: Abstraction has 1007 states and 3525 transitions. [2021-03-10 22:13:18,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:18,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 3525 transitions. [2021-03-10 22:13:18,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:13:18,320 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:18,320 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:18,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9035,741 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:18,521 INFO L428 AbstractCegarLoop]: === Iteration 742 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:18,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:18,521 INFO L82 PathProgramCache]: Analyzing trace with hash -605939114, now seen corresponding path program 686 times [2021-03-10 22:13:18,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:18,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46972753] [2021-03-10 22:13:18,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:18,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46972753] [2021-03-10 22:13:18,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438099737] [2021-03-10 22:13:18,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 742 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 742 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:18,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:13:18,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:18,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:13:18,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:19,228 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_442, v_prenex_443, nondet_0], 1=[v_prenex_449, v_prenex_445, v_prenex_447]} [2021-03-10 22:13:19,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:13:19,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:19,457 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-03-10 22:13:19,458 INFO L628 ElimStorePlain]: treesize reduction 61, result has 70.4 percent of original size [2021-03-10 22:13:19,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:13:19,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:19,565 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-10 22:13:19,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:19,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:13:19,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:19,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:19,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:13:19,677 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:19,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:19,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:13:19,683 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:19,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:19,776 INFO L518 ElimStorePlain]: Eliminatee v_prenex_445 vanished before elimination [2021-03-10 22:13:19,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-03-10 22:13:19,782 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:19,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:19,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:13:19,788 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:19,930 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-10 22:13:19,930 INFO L628 ElimStorePlain]: treesize reduction 15, result has 85.6 percent of original size [2021-03-10 22:13:19,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:13:19,932 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:212, output treesize:29 [2021-03-10 22:13:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:20,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:20,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:13:20,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011360735] [2021-03-10 22:13:20,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:13:20,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:20,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:13:20,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:13:20,118 INFO L87 Difference]: Start difference. First operand 1007 states and 3525 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:21,041 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-03-10 22:13:21,257 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-03-10 22:13:21,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:21,719 INFO L93 Difference]: Finished difference Result 1532 states and 5031 transitions. [2021-03-10 22:13:21,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:13:21,720 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:13:21,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:21,722 INFO L225 Difference]: With dead ends: 1532 [2021-03-10 22:13:21,723 INFO L226 Difference]: Without dead ends: 1505 [2021-03-10 22:13:21,723 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1518.3ms TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:13:21,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-03-10 22:13:21,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1009. [2021-03-10 22:13:21,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 3.501984126984127) internal successors, (3530), 1008 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:21,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 3530 transitions. [2021-03-10 22:13:21,736 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 3530 transitions. Word has length 22 [2021-03-10 22:13:21,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:21,736 INFO L480 AbstractCegarLoop]: Abstraction has 1009 states and 3530 transitions. [2021-03-10 22:13:21,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:21,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 3530 transitions. [2021-03-10 22:13:21,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:13:21,737 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:21,737 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:21,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 742 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9053 [2021-03-10 22:13:21,937 INFO L428 AbstractCegarLoop]: === Iteration 743 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:21,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:21,937 INFO L82 PathProgramCache]: Analyzing trace with hash 674002882, now seen corresponding path program 687 times [2021-03-10 22:13:21,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:21,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596771607] [2021-03-10 22:13:21,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:22,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596771607] [2021-03-10 22:13:22,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288600937] [2021-03-10 22:13:22,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 743 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 743 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:22,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:13:22,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:22,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:13:22,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:22,885 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-03-10 22:13:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:23,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:23,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:13:23,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354371082] [2021-03-10 22:13:23,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:13:23,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:23,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:13:23,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:13:23,173 INFO L87 Difference]: Start difference. First operand 1009 states and 3530 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:24,254 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2021-03-10 22:13:24,643 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 81 [2021-03-10 22:13:25,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:25,083 INFO L93 Difference]: Finished difference Result 1443 states and 4782 transitions. [2021-03-10 22:13:25,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:13:25,084 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:13:25,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:25,086 INFO L225 Difference]: With dead ends: 1443 [2021-03-10 22:13:25,086 INFO L226 Difference]: Without dead ends: 1443 [2021-03-10 22:13:25,086 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1998.7ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:13:25,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-03-10 22:13:25,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1016. [2021-03-10 22:13:25,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 3.504433497536946) internal successors, (3557), 1015 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:25,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 3557 transitions. [2021-03-10 22:13:25,100 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 3557 transitions. Word has length 22 [2021-03-10 22:13:25,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:25,100 INFO L480 AbstractCegarLoop]: Abstraction has 1016 states and 3557 transitions. [2021-03-10 22:13:25,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:25,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 3557 transitions. [2021-03-10 22:13:25,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:13:25,101 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:25,101 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:25,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9071,743 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:25,301 INFO L428 AbstractCegarLoop]: === Iteration 744 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:25,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:25,301 INFO L82 PathProgramCache]: Analyzing trace with hash -819904840, now seen corresponding path program 688 times [2021-03-10 22:13:25,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:25,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120192002] [2021-03-10 22:13:25,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:25,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120192002] [2021-03-10 22:13:25,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058484295] [2021-03-10 22:13:25,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 744 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 744 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:25,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:13:25,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:25,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:13:25,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:26,201 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-03-10 22:13:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:26,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:26,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:13:26,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163724662] [2021-03-10 22:13:26,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:13:26,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:26,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:13:26,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:13:26,469 INFO L87 Difference]: Start difference. First operand 1016 states and 3557 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:27,487 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 99 [2021-03-10 22:13:27,863 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 93 [2021-03-10 22:13:28,055 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 22:13:28,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:28,261 INFO L93 Difference]: Finished difference Result 1449 states and 4789 transitions. [2021-03-10 22:13:28,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:13:28,262 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:13:28,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:28,264 INFO L225 Difference]: With dead ends: 1449 [2021-03-10 22:13:28,264 INFO L226 Difference]: Without dead ends: 1443 [2021-03-10 22:13:28,264 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1914.3ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:13:28,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-03-10 22:13:28,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1013. [2021-03-10 22:13:28,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 3.5039525691699605) internal successors, (3546), 1012 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:28,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3546 transitions. [2021-03-10 22:13:28,276 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3546 transitions. Word has length 22 [2021-03-10 22:13:28,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:28,276 INFO L480 AbstractCegarLoop]: Abstraction has 1013 states and 3546 transitions. [2021-03-10 22:13:28,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:28,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3546 transitions. [2021-03-10 22:13:28,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:13:28,277 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:28,277 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:28,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9094,744 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:28,477 INFO L428 AbstractCegarLoop]: === Iteration 745 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:28,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:28,478 INFO L82 PathProgramCache]: Analyzing trace with hash -282049262, now seen corresponding path program 689 times [2021-03-10 22:13:28,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:28,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104619511] [2021-03-10 22:13:28,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:28,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:28,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104619511] [2021-03-10 22:13:28,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353029161] [2021-03-10 22:13:28,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 745 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 745 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:28,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:13:28,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:28,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:13:28,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:29,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:29,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:13:29,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455135813] [2021-03-10 22:13:29,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:13:29,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:29,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:13:29,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:13:29,614 INFO L87 Difference]: Start difference. First operand 1013 states and 3546 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:30,741 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-03-10 22:13:31,267 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 81 [2021-03-10 22:13:31,657 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 50 [2021-03-10 22:13:31,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:31,808 INFO L93 Difference]: Finished difference Result 1413 states and 4707 transitions. [2021-03-10 22:13:31,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:13:31,809 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:13:31,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:31,811 INFO L225 Difference]: With dead ends: 1413 [2021-03-10 22:13:31,811 INFO L226 Difference]: Without dead ends: 1401 [2021-03-10 22:13:31,811 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2229.3ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:13:31,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-03-10 22:13:31,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1010. [2021-03-10 22:13:31,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 3.5034687809712586) internal successors, (3535), 1009 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:31,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 3535 transitions. [2021-03-10 22:13:31,823 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 3535 transitions. Word has length 22 [2021-03-10 22:13:31,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:31,823 INFO L480 AbstractCegarLoop]: Abstraction has 1010 states and 3535 transitions. [2021-03-10 22:13:31,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:31,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 3535 transitions. [2021-03-10 22:13:31,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:13:31,824 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:31,824 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:32,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 745 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9111 [2021-03-10 22:13:32,024 INFO L428 AbstractCegarLoop]: === Iteration 746 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:32,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:32,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1802387316, now seen corresponding path program 690 times [2021-03-10 22:13:32,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:32,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828260225] [2021-03-10 22:13:32,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:32,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828260225] [2021-03-10 22:13:32,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109527170] [2021-03-10 22:13:32,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 746 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 746 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:32,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:13:32,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:32,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:13:32,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:32,921 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-03-10 22:13:33,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:33,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:33,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:33,099 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-03-10 22:13:33,099 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:13:33,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:13:33,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-03-10 22:13:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:33,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:33,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:13:33,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906429356] [2021-03-10 22:13:33,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:13:33,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:33,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:13:33,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:13:33,231 INFO L87 Difference]: Start difference. First operand 1010 states and 3535 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:34,228 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 99 [2021-03-10 22:13:34,439 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-03-10 22:13:34,635 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-10 22:13:34,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:34,909 INFO L93 Difference]: Finished difference Result 1527 states and 4992 transitions. [2021-03-10 22:13:34,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:13:34,910 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:13:34,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:34,912 INFO L225 Difference]: With dead ends: 1527 [2021-03-10 22:13:34,912 INFO L226 Difference]: Without dead ends: 1527 [2021-03-10 22:13:34,912 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1749.3ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:13:34,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2021-03-10 22:13:34,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1018. [2021-03-10 22:13:34,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 3.511307767944936) internal successors, (3571), 1017 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:34,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 3571 transitions. [2021-03-10 22:13:34,925 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 3571 transitions. Word has length 22 [2021-03-10 22:13:34,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:34,925 INFO L480 AbstractCegarLoop]: Abstraction has 1018 states and 3571 transitions. [2021-03-10 22:13:34,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:34,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 3571 transitions. [2021-03-10 22:13:34,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:13:34,926 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:34,926 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:35,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9134,746 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:35,127 INFO L428 AbstractCegarLoop]: === Iteration 747 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:35,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:35,127 INFO L82 PathProgramCache]: Analyzing trace with hash 998672258, now seen corresponding path program 691 times [2021-03-10 22:13:35,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:35,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966189638] [2021-03-10 22:13:35,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:35,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966189638] [2021-03-10 22:13:35,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610086777] [2021-03-10 22:13:35,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 747 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 747 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:35,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:13:35,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:36,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:36,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:36,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:36,140 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-03-10 22:13:36,140 INFO L518 ElimStorePlain]: Eliminatee v_prenex_479 vanished before elimination [2021-03-10 22:13:36,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:13:36,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-03-10 22:13:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:36,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:36,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:13:36,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818290586] [2021-03-10 22:13:36,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:13:36,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:36,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:13:36,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:13:36,287 INFO L87 Difference]: Start difference. First operand 1018 states and 3571 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:36,923 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-03-10 22:13:37,433 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-03-10 22:13:37,663 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-03-10 22:13:38,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:38,096 INFO L93 Difference]: Finished difference Result 1533 states and 4993 transitions. [2021-03-10 22:13:38,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:13:38,097 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:13:38,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:38,100 INFO L225 Difference]: With dead ends: 1533 [2021-03-10 22:13:38,100 INFO L226 Difference]: Without dead ends: 1527 [2021-03-10 22:13:38,100 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1737.6ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:13:38,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2021-03-10 22:13:38,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1015. [2021-03-10 22:13:38,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 3.510848126232742) internal successors, (3560), 1014 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3560 transitions. [2021-03-10 22:13:38,113 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3560 transitions. Word has length 22 [2021-03-10 22:13:38,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:38,113 INFO L480 AbstractCegarLoop]: Abstraction has 1015 states and 3560 transitions. [2021-03-10 22:13:38,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:38,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3560 transitions. [2021-03-10 22:13:38,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:13:38,114 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:38,114 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:38,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9165,747 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:38,315 INFO L428 AbstractCegarLoop]: === Iteration 748 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:38,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:38,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1050986878, now seen corresponding path program 692 times [2021-03-10 22:13:38,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:38,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007361749] [2021-03-10 22:13:38,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:38,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007361749] [2021-03-10 22:13:38,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680111859] [2021-03-10 22:13:38,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 748 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 748 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:38,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:13:38,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:38,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 22:13:38,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:39,266 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-03-10 22:13:39,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:39,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:39,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:39,403 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-03-10 22:13:39,403 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-03-10 22:13:39,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:13:39,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-03-10 22:13:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:39,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:39,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-03-10 22:13:39,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356170270] [2021-03-10 22:13:39,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:13:39,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:39,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:13:39,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:13:39,552 INFO L87 Difference]: Start difference. First operand 1015 states and 3560 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:40,593 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 106 [2021-03-10 22:13:40,832 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-03-10 22:13:41,041 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-10 22:13:41,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:41,427 INFO L93 Difference]: Finished difference Result 1501 states and 4928 transitions. [2021-03-10 22:13:41,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:13:41,428 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:13:41,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:41,430 INFO L225 Difference]: With dead ends: 1501 [2021-03-10 22:13:41,430 INFO L226 Difference]: Without dead ends: 1501 [2021-03-10 22:13:41,431 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1908.9ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:13:41,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2021-03-10 22:13:41,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1011. [2021-03-10 22:13:41,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 3.504950495049505) internal successors, (3540), 1010 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:41,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 3540 transitions. [2021-03-10 22:13:41,449 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 3540 transitions. Word has length 22 [2021-03-10 22:13:41,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:41,449 INFO L480 AbstractCegarLoop]: Abstraction has 1011 states and 3540 transitions. [2021-03-10 22:13:41,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:41,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 3540 transitions. [2021-03-10 22:13:41,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:13:41,450 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:41,450 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:41,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 748 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9187 [2021-03-10 22:13:41,651 INFO L428 AbstractCegarLoop]: === Iteration 749 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:41,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:41,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1030250350, now seen corresponding path program 693 times [2021-03-10 22:13:41,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:41,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770661129] [2021-03-10 22:13:41,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:41,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770661129] [2021-03-10 22:13:41,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287458411] [2021-03-10 22:13:41,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 749 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 749 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:42,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:13:42,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:42,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:13:42,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:42,562 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 22:13:42,709 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_493, v_prenex_498, nondet_0], 1=[v_prenex_492, v_prenex_494, v_prenex_497]} [2021-03-10 22:13:42,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:13:42,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:42,960 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-10 22:13:42,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:42,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:13:42,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,222 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-10 22:13:43,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:43,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-03-10 22:13:43,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,437 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-03-10 22:13:43,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:43,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-10 22:13:43,444 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,458 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-10 22:13:43,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-03-10 22:13:43,460 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,678 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-10 22:13:43,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:43,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:43,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2021-03-10 22:13:43,701 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,707 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:43,708 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,899 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-10 22:13:43,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:43,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-03-10 22:13:43,907 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:43,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:43,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2021-03-10 22:13:43,925 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:44,239 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-03-10 22:13:44,239 INFO L628 ElimStorePlain]: treesize reduction 30, result has 85.7 percent of original size [2021-03-10 22:13:44,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-03-10 22:13:44,243 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:322, output treesize:133 [2021-03-10 22:13:44,411 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 22:13:44,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:44,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:44,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-03-10 22:13:44,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520543165] [2021-03-10 22:13:44,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:13:44,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:44,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:13:44,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:13:44,613 INFO L87 Difference]: Start difference. First operand 1011 states and 3540 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:45,042 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-03-10 22:13:45,290 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-03-10 22:13:45,550 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-03-10 22:13:45,931 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-03-10 22:13:46,329 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-03-10 22:13:46,756 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-03-10 22:13:47,254 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-03-10 22:13:47,906 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2021-03-10 22:13:48,463 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2021-03-10 22:13:49,081 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-03-10 22:13:49,564 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 Received shutdown request... [2021-03-10 22:13:49,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:13:49,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 749 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9202 [2021-03-10 22:13:49,825 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 22:13:49,828 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 22:13:49,828 INFO L202 PluginConnector]: Adding new model name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 10:13:49 BasicIcfg [2021-03-10 22:13:49,828 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 22:13:49,828 INFO L168 Benchmark]: Toolchain (without parser) took 888500.19 ms. Allocated memory was 255.9 MB in the beginning and 539.0 MB in the end (delta: 283.1 MB). Free memory was 236.9 MB in the beginning and 374.5 MB in the end (delta: -137.7 MB). Peak memory consumption was 147.1 MB. Max. memory is 16.0 GB. [2021-03-10 22:13:49,828 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 238.2 MB in the beginning and 238.0 MB in the end (delta: 179.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 22:13:49,828 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.14 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 234.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 22:13:49,828 INFO L168 Benchmark]: Boogie Preprocessor took 24.09 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 22:13:49,828 INFO L168 Benchmark]: RCFGBuilder took 444.69 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 221.2 MB in the end (delta: 12.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 16.0 GB. [2021-03-10 22:13:49,828 INFO L168 Benchmark]: TraceAbstraction took 888001.63 ms. Allocated memory was 255.9 MB in the beginning and 539.0 MB in the end (delta: 283.1 MB). Free memory was 220.5 MB in the beginning and 374.5 MB in the end (delta: -154.0 MB). Peak memory consumption was 129.3 MB. Max. memory is 16.0 GB. [2021-03-10 22:13:49,829 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 238.2 MB in the beginning and 238.0 MB in the end (delta: 179.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.14 ms. Allocated memory is still 255.9 MB. Free memory was 236.3 MB in the beginning and 234.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 24.09 ms. Allocated memory is still 255.9 MB. Free memory was 234.8 MB in the beginning and 233.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 444.69 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 221.2 MB in the end (delta: 12.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 888001.63 ms. Allocated memory was 255.9 MB in the beginning and 539.0 MB in the end (delta: 283.1 MB). Free memory was 220.5 MB in the beginning and 374.5 MB in the end (delta: -154.0 MB). Peak memory consumption was 129.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 114]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 114). Cancelled while BasicCegarLoop was constructing difference of abstraction (1011states) and FLOYD_HOARE automaton (currently 16 states, 20 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 32 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 887939.7ms, OverallIterations: 749, TraceHistogramMax: 3, EmptinessCheckTime: 419.1ms, AutomataDifference: 429759.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 38039 SDtfs, 76718 SDslu, 221438 SDs, 0 SdLazy, 263111 SolverSat, 6732 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 100493.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26257 GetRequests, 12176 SyntacticMatches, 461 SemanticMatches, 13619 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42069 ImplicationChecksByTransitivity, 414817.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1044occurred in iteration=733, InterpolantAutomatonStates: 8164, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4360.2ms AutomataMinimizationTime, 748 MinimizatonAttempts, 162292 StatesRemovedByMinimization, 747 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3516.1ms SsaConstructionTime, 8294.7ms SatisfiabilityAnalysisTime, 241623.0ms InterpolantComputationTime, 30325 NumberOfCodeBlocks, 30318 NumberOfCodeBlocksAsserted, 2198 NumberOfCheckSat, 28828 ConstructedInterpolants, 431 QuantifiedInterpolants, 269112 SizeOfPredicates, 6823 NumberOfNonLiveVariables, 69194 ConjunctsInSsa, 16152 ConjunctsInUnsatCore, 1497 InterpolantComputations, 3 PerfectInterpolantSequences, 1997/6764 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown